- Phase transfer catalyzed synthesis of o-ethoxyphenol under microwave irradiation
-
o-Chlorophenol reacted with ethanol in the presence of sodium hydroxide and phase transfer catalyst under microwave irradiation and gave o-ethoxyphenol conveniently within a few minutes, and the isolated yield of o-ethoxyphenol vary from 69% to 82%.
- Pang, Jun,Xi, Zuwei,Cao, Guoying,Yuan, Yuncheng
-
-
Read Online
- Hollow, mesoporous, eutectic Zn1?xMgxO nano-spheres as solid acid-base catalysts for the highly regio-selectiveO-methylation of 1,2-diphenols
-
The highly regio-selectiveO-methylation of catechol with dimethyl carbonate (DMC), catalyzed by a solid acid-base catalyst, is an environmentally friendly chemical process for industrial production of guaiacol. However, a guaiacol yield below 84% and high reaction temperature above 280 °C limit its industrial application. Here, hollow, mesoporous Zn1?xMgxO nano-spheres with a eutectic structure, denoted as Zn1?xMgxO HMNSs (x= 0.012-0.089), are facilely fabricatedviathe calcination of Mg2+/Zn2+ion-adsorbing carbon spheres at 500 °C in air. In theO-methylation of catechol with DMC at 180 °C, Zn1?xMgxO HMNSs (x= 0.052) afford guaiacol in 95.5% yield with a complete catechol conversion. Furthermore, 89.0-95.3% mono-ether yields with high 1,2-diphenol conversions (94.5-100%) are also obtained for the other 1,2-diphenols bearing -CH3and -Br groups. Moreover, a plausible mechanism for highly selectiveO-methylation of catechol with DMC is proposed, in which the single-site activation and double-site activation of phenolic hydroxyls by the basic oxygen of Mg-O afford guaiacol and veratrole, respectively.
- Liu, Jie,Ma, Xuebing,Wang, Xuri,Xie, Guangxin,Yin, Zuyong,Zhang, Jianing
-
p. 7454 - 7466
(2021/11/23)
-
- Thermodynamic analysis of liquid-phase dehydrogenation of o-ethoxycyclohexanol to guaethol
-
The standard molar enthalpies of formation, standard molar entropies and molar heat capacities of o-ethoxycyclohexanol and guaethol in liquid phase are calculated based on the Benson group contribution method. The function formulas of reaction enthalpy ch
- Liu, Yanlong,Zhang, Yadong,Feng, Junbo,Shi, Xiancai
-
p. 637 - 644
(2020/07/28)
-
- Method for simultaneously preparing 2-ethoxyphenol and 1,3-benzodioxolane-2-one
-
The invention belongs to the field of organic synthesis, and provides a method for simultaneously preparing 2-ethoxyphenol and 1,3-benzodioxolane-2-one. According to the preparation method, catechol and diethyl carbonate are subjected to transesterification under the action of a catalyst, so that the 2-ethoxyphenol and the 1,3-benzodioxolane-2-one can be obtained. The combined selectivity of the 2-ethoxyphenol and the 1,3-benzodioxolane-2-one can reach 97%, and the method has the advantages of high conversion rate, high selectivity, high economic benefit, environmental friendliness and the like.
- -
-
Paragraph 0024-0027
(2020/06/09)
-
- Highly selective conversion of guaiacol to: Tert -butylphenols in supercritical ethanol over a H2WO4 catalyst
-
The conversion of guaiacol is examined at 300 °C in supercritical ethanol over a H2WO4 catalyst. Guaiacol is consumed completely, meanwhile, 16.7% aromatic ethers and 80.0% alkylphenols are obtained. Interestingly, tert-butylphenols are produced mainly with a high selectivity of 71.8%, and the overall selectivity of 2,6-di-tert-butylphenol and 2,6-di-tert-butyl-4-ethylphenol is as high as 63.7%. The experimental results indicate that catechol and 2-ethoxyphenol are the intermediates. Meanwhile, the WO3 sites play an important role in the conversion of guaiacol and the Br?nsted acid sites on H2WO4 enhance the conversion and favour a high selectivity of the tert-butylphenols. The recycling tests show that the carbon deposition on the catalyst surface, the dehydration and partial reduction of the catalyst itself are responsible for the decay of the H2WO4 catalyst. Finally, the possible reaction pathways proposed involve the transetherification process and the alkylation process during guaiacol conversion.
- Mai, Fuhang,Cui, Kai,Wen, Zhe,Wu, Kai,Yan, Fei,Chen, Mengmeng,Chen, Hong,Li, Yongdan
-
p. 2764 - 2771
(2019/02/01)
-
- A utilizes ethylene directly producing O-ethoxyl phenol method (by machine translation)
-
The invention relates to a use of ethylene in the direct production of O-ethoxyl phenol method, comprises the following steps: to join the catechol in the autoclave, the solvent, the main catalyst and the auxiliary catalyst, sealing the high-pressure autoclave, for most of the air in the pump coke, opening stirring and heating to 180 - 260 °C; the ethylene gas to make the kettle pressure reaches the 0.6 - 1.6 mpa, maintained at the pressure under the reaction 4 - 8 hours, after the reaction is completed through the pressure relief valve is not involved in the reaction of the released ethylene gas, lowering the temperature to 100 °C following, pressure-reducing filter and recycle catalyst; the reaction solution through the column chromatography recovery catechol and obtaining a product, or by reduced pressure distillation to remove the majority of the solvent to obtain catechol and product-based crude product, the crude product rectification to get the pure product O-ethoxy group phenol; the process of the invention is simple, short reaction route, the production efficiency is high, can reduce the production cost, and can reduce the generation of three wastes with the treatment cost, very environmental protection. (by machine translation)
- -
-
Paragraph 0023-0036
(2019/01/16)
-
- Direct oxidation of the C(sp2)-C(sp3) bond from benzyltrimethylsilanes to phenols
-
A novel pathway for direct conversion of benzylsilanes to phenols by oxidation with Na2S2O8 and oxygen is efficiently developed under mild and neutral conditions. The reaction shows good functional group tolerance to afford phenols in moderate yields. The possible mechanism is proposed based on the isotopic labeling trials.
- Li, Wei,Gao, Guolin,Gao, Yuan,Yang, Chao,Xia, Wujiong
-
supporting information
p. 5291 - 5293
(2017/07/10)
-
- METHOD FOR PREPARING P-HYDROXYMANDELIC COMPOUNDS IN STIRRED REACTORS
-
The process allows the preparation of a p-hydroxymandelic compound, comprising at least one step of condensation of at least one aromatic compound bearing at least one hydroxyl group and whose para position is free, with glyoxylic acid, the condensation reaction being performed in at least one reactor equipped with at least one mixing means, the specific mixing power being between 0.1 kW/m3 and 15 kW/m3. In addition, the invention also relates to a process for preparing a 4-hydroxyaromatic aldehyde by oxidation of this p-hydroxymandelic compound.
- -
-
-
- Preparation method for converting ortho-position ethyl vanillin into ethoxyphenol
-
The invention belongs to the field of organic synthesis and particularly relates to a preparation method for converting ortho-position ethyl vanillin into ethoxyphenol. The method comprises the following steps: 1, adding an appropriate amount of ortho-position ethyl vanillin into a reaction kettle, and heating the ortho-position ethyl vanillin so that the ortho-position ethyl vanillin can be molten to be in the liquid state; 2, starting stirring, and adding a composite catalyst into the reaction kettle; 3, conducting heating and raising the temperature to 120-160 DEG C, conducting a reaction, and conducting a backflow reaction for 1-5 hours; 4, conducting press filtering, and recycling the composite catalyst; 5, conducting simple distillation on filtrate, so that a product, namely ethoxyphenol, is obtained, wherein the mass ratio of the ortho-position ethyl vanillin to the ethoxyphenol is 1: (0.01-0.07). By means of the preparation method, the problem that at present, ortho-position ethyl vanillin cannot be disposed is solved, an ethyl vanillin manufacturer can synthesize ortho-position ethyl vanillin into ethoxyphenol independently by means of the method, accumulation of ortho-position ethyl vanillin is reduced, it is beneficial to cycle use of chemical raw materials, and environmental pollution is reduced.
- -
-
Paragraph 0057; 0058; 0059; 0060; 0061; 0062; 0063; 0064
(2016/10/10)
-
- In the cleaving org. compd. ether bond
-
PROBLEM TO BE SOLVED: To provide a cleavage method of a methyl ether bond in an organic compound for cleaving the methyl ether bond in the organic compound which is usable as various synthesis methods for organic compounds without especially using a solvent or a post-treatment agent. SOLUTION: The method is characterized in that an organic compound having a methyl ether bond is contacted with hydrogen iodide gas at room temperature without dissolving a solvent so that the methyl ether bond is cleaved. COPYRIGHT: (C)2013,JPOandINPIT
- -
-
Paragraph 0069-0072
(2016/12/22)
-
- Selective catalytic conversion of guaiacol to phenols over a molybdenum carbide catalyst
-
An activated carbon supported α-molybdenum carbide catalyst (α-MoC1-x/AC) showed remarkable activity in the selective deoxygenation of guaiacol to substituted mono-phenols in low carbon number alcohol solvents. Combined selectivities of up to 85% for phenol and alkylphenols were obtained at 340°C for α-MoC1-x/AC at 87% conversion in supercritical ethanol. The reaction occurs via consecutive demethylation followed by a dehydroxylation route instead of a direct demethoxygenation pathway.
- Ma, Rui,Cui, Kai,Yang, Le,Ma, Xiaolei,Li, Yongdan
-
supporting information
p. 10299 - 10301
(2015/06/25)
-
- Transetherification of guaiacol to o-ethoxyphenol with gamma Al 2O3 as a catalyst in supercritical ethanol
-
The production of chemicals from lignin and lignin depolymerisation products is a promising alternative route to replace fossil fuels. Transetherification of guaiacol, a lignin derived model compound, to o-ethoxyphenol with γ-Al2O3 as the catalyst in supercritical ethanol has been investigated. The best reaction condition is 280°C for 3 h, giving a yield of 42% with a selectivity of 86%. A reaction pathway is also proposed. Besides, this work provides an example for producing a longer chain ether from a short chain ether.
- Yang, Le,Seshan,Li, Yongdan
-
-
- Dialkoxybenzene and dialkoxyallylbenzene feeding and oviposition deterrents against the cabbage looper, trichoplusia ni: Potential insect behavior control agents
-
The antifeedant, oviposition deterrent, and toxic effects of individual dialkoxybenzene compounds/sets and of hydroxy- or alkoxy-substituted allylbenzenes, obtained through Claisen rearrangement of substituted allyloxybenzenes, were assessed against the cabbage looper, Trichoplusia ni, in laboratory bioassays. Most of the compounds/sets strongly deterred larval feeding, with some exhibiting mild toxic and oviposition deterrent effects as well. Some of the compounds/sets were more active than the commercial insect repellent, DEET (N,N-diethyl-m-toluamide), as both feeding and oviposition deterrents against the cabbage looper. On the basis of the obtained oviposition data a general hypothesis was proposed regarding the oviposition sites: one binding mode with the alkyl and allyl groups on the same side of the benzene ring resulted in deterrence, the other with alkyl and allyl groups on opposite sides of the benzene ring resulted in stimulation. The results suggest some structure-activity relationships useful in improving the efficacy of the compounds and designing new, nontoxic insect control agents for agriculture.
- Akhtar, Yasmin,Yu, Yang,Isman, Murray B.,Plettner, Erika
-
scheme or table
p. 4983 - 4991
(2011/08/06)
-
- METHODS AND COMPOSITIONS FOR CONTROL OF GYPSY MOTHS, Lymanria dispar
-
The invention provides in part dialkoxybenzene and eugenol compounds for controlling infestation by a Lymantria dispar, and methods thereof. The compounds include a compound of Formula I: where R1 may be methyl, ethyl, propyl, n-butyl, isopentyl (3-methylbutyl) or allyl; R2 may be at positions 2, 3 or 4 and may be H, methyl, ethyl, propyl, n-butyl, isopentyl (3-methylbutyl) or allyl; and R3 may be optionally present at positions 2, 3 and 4, and is allyl; with the provisos that when R2 is at position 2, R3 if present is at position 3, or when R2 is at to position 3, R3 if present is at positions 2 or 4, or when R2 is at position 4, R3 if present is at position 2; or of Formula II: where R1 may be methyl, ethyl, propyl, n-butyl, isopentyl (3-methylbutyl) or allyl; or mixtures thereof.
- -
-
Page/Page column 10
(2010/08/07)
-
- METHODS AND COMPOSITIONS FOR CONTROL OF CABBAGE LOOPER, Trichoplusia ni
-
The invention provides in part dialkoxybenzene compounds for controlling infestation by a Trichoplusia ni, and methods thereof. The compounds include a compound of Formula I: where R1 may be methyl, ethyl, propyl, n-butyl, isopentyl(3-methylbutyl) or allyl; R2 may be at positions 2, 3 or 4 and may be H, methyl, ethyl, propyl, n-butyl, isopentyl(3-methylbutyl) or allyl; and R3 may be optionally present at positions 2, 3 and 4, and is allyl; except that when R2 is at position 2, R3 if present is at position 3, and when R2 is at position 3, R3 if present is at positions 2 or 4, and when R2 is at position 4, R3 if present is at position 2, and when R2 is at position 4 and R3, if present, has reacted with an OH group at position 1 in a Markovnikov sense, then R3 becomes R4, a dihydrofuran.
- -
-
Page/Page column 9
(2010/07/04)
-
- Convenient and efficient preparation of ethyl 6-n-decyloxy-7-ethoxy-4- hydroxyquinoline-3-carboxylate
-
Ethyl 6-N-decyloxy-7-ethoxy-4-hydroxyquinoline-3-carboxylate has been synthesized from pyrocatechol in six steps and in 39.3% overall yield.
- Xu, Maoyou,Zhang, Jin,Wu, Xue,Sun, Juanjuan,Shi, Zhiqiang
-
experimental part
p. 992 - 997
(2010/05/18)
-
- Screening of dialkoxybenzenes and disubstituted cyclopentene derivatives against the cabbage looper, Trichoplusia ni, for the discovery of new feeding and oviposition deterrents
-
The antifeedant, oviposition deterrent, and toxic effects of dialkoxybenzene minilibraries and of disubstituted cyclopentene minilibraries (i.e., consisting of four to five compounds) along with their pure constituent compounds were assessed against third instar larvae and adults of the cabbage looper, Trichoplusia ni, in laboratory bioassays in a search for new insect control agents. These compounds mimic naturally occurring bioactive odorants and tastants and are relatively easily prepared from commodity chemicals. Most of these libraries strongly deterred larval feeding, with some exhibiting strong toxic and oviposition deterrent effects as well. Our results suggest some structure-function relationships within these libraries. Replacement of a methyl group with larger alkyl substituents increased the feeding deterrent effects in most cases. The presence of a free hydroxyl group, irrespective of the carbon framework or alkyl substituent, served to reduce feeding deterrent effects in all series of compounds. Further, exceeding a certain group size also generally had a detrimental effect. This information will be useful in designing new insect control agents for agriculture. Some of these libraries and compounds may have potential for development as commercial insecticides.
- Akhtar, Yasmin,Isman, Murray B.,Paduraru, Peggy M.,Nagabandi, Srinivas,Nair, Ranjeet,Plettner, Erika
-
scheme or table
p. 10323 - 10330
(2009/10/02)
-
- Novel proton type beta zeolite, preparation method thereof and process for preparing phenol compound using the same
-
Disclosed are a proton type β zeolite in which an acid site showing a desorption peak with a range of ±100° C. with a center of 330° C. exists in a spectrum measured by the ammonia temperature programmed desorption method (NH3-TPD), and an amount of a strong acid site showing a desorption peak of 500° C. or higher is controlled to 2.5 μmol/g or less, a method for preparing the same, and a process for preparing a phenol compound by oxidizing a benzene compound with a peroxide in the presence of the proton type β zeolite.
- -
-
-
- Monooxygenation of aromatic compounds by dioxygen with bioinspired systems using non-heme iron catalysts and tetrahydropterins: Comparison with other reducing agents and interesting regioselectivity favouring meta-hydroxylation
-
Monooxygenation of aromatic compounds by dioxygen in the presence of catalytic amounts of an iron(II) salt and tetrahydropterins as reducing agents occurs with a regioselectivity favouring meta-hydroxylation of arenes bearing an electron-donating substituent, such as anisole, phenetole, toluene, and ethylbenzene. Comparison of similar systems using various reducing agents showed that only tetrahydropterins and ascorbate led to such a major meta-hydroxylation. The tetrahydropterin- and ascorbate-dependent systems should be useful for the preparation of meta-hydroxylated metabolites of aromatic drugs, as shown here in the case of diclofenac.
- Mathieu, Delphine,Bartoli, Jean Fran?ois,Battioni, Pierrette,Mansuy, Daniel
-
p. 3855 - 3862
(2007/10/03)
-
- Process for functionalising a phenolic compound carrying an electron-donating group
-
The invention concerns a method for functionalizing a phenolic compound bearing an electron-donor group, in said group para position, inter alia a method for the amidoalkylation of a phenolic compound bearing an electron-donor group, and more particularly, a phenolic compound bearing an electron-donor group preferably, in the hydroxyl group ortho position. The method for functionalizing in para position with respect to an electron-donor group carried by a phenolic compound is characterised in that the phenolic compound bearing an electron-donor group is subjected to the following steps: a first step which consists of protecting the hydroxyl group in the form of a sulphonic ester function; a second step which consists in reacting the protected phenolic compound with an electrophilic reagent; optionally, a third step deprotecting the hydroxyl group.
- -
-
-
- Iron polynitroporphyrins bearing up to eight β-nitro groups as interesting new catalysts for H2O2-dependent hydrocarbon oxidation: Unusual regioselectivity in hydroxylation of alkoxybenzenes
-
A series of iron porphyrins bearing one to eight β-nitro substituents were synthesized and evaluated as catalysts for hydrocarbon oxidation with H2O2; iron porphyrins bearing five or six β-nitro groups were the best catalysts for cyclooctene epoxidation and adamantane or anisole hydroxylation without need of a cocatalyst, and led to very different regioselectivities with either H2O2 or PhIO as oxidants, as shown by an unusual ortho-hydroxylation of alkoxybenzenes highly favored in the H2O2-dependent oxidations.
- Bartoli,Barch,Palacio,Battioni,Mansuy
-
p. 1718 - 1719
(2007/10/03)
-
- Etherification of phenols catalysed by solid-liquid phase transfer catalyst PEG400 without solvent
-
Aromatic ethers were synthesised in excellent yields(above 86 %) and purity by the etherification of phenols with dimethyl sulfate or alkyl halides, catalysed by phase transfer catalyst PEG400 under solvent-free conditions, and the effects of some key reaction conditions were also studied.
- Cao, Yu-Qing,Pei, Ben-Gao
-
p. 1759 - 1766
(2007/10/03)
-
- O-alkylation of phenolic compounds via rare earth orthophosphate catalysts
-
Carbocyclic/aliphatic ethers, for example anisole, quaicol, guaethol, p-methoxyphenol and ethylene dioxybenzene, are selectively prepared, in good yield, by reacting a phenolic compound, for example a phenol, hydroquinone, pyrocatechin, naphthol, or the like, with an alcohol, for example methanol, ethanol, isopropanol, ethylene glycol, etc., in gaseous phase, in the presence of a catalytically effective amount of a trivalent rare earth metal orthophosphate, for example a lanthanum, cerium or samarium orthophosphate, optionally doped with an alkali or alkaline earth metal, preferably cesium.
- -
-
-
- Selective dealkylations of alkyl aryl ethers in heterogeneous basic media under microwave irradiation
-
Ethyl isoeugenol and 2-ethoxyanisole could be selectively deethylated using potassium t-butoxide in the presence of crown ether under solvent-free conditions. By addition of ethylene glycol, selectivity was reversed to demethylation. In both cases, strong enhancements were observed under focused microwaves.
- Oussaid, Abdelouahad,Thach, Le Ngoc,Loupy, Andre
-
p. 2451 - 2454
(2007/10/03)
-
- Syntheses of long-chain quaternary ammonium salts from fatty alcohols by microwave irradiation
-
The phase-transfer catalysts, long-chain quaternary ammonium salts, were rapidly synthesized from fatty alcohols by the reactions with hydrogen halides in the presence of trialkyl amines under microwave irradiation. The catalysts could be widely applied in a variety of quick and new organic reactions, whether by conventional heating or under microwave irradiation. The reaction efficiencies under microwave irradiation were higher than those obtained with conventional heating.
- Jiang,Hu,Pang,Yuan
-
p. 847 - 850
(2007/10/03)
-
- Process for the preparation of sulfonylureas
-
Herbicidal sulfonylureas of the formula I, STR1 in which X is --O--, --O--NR2 -- or --SO2 --NR2 --, Y is --N-- or CH, R1 is (substituted) alkyl, (substituted) alkenyl or (substituted) alkynyl, or else, where X=O, (substituted) phenyl, R2 is H, alkyl, alkenyl, alkynyl or cycloalkyl, R3, R4 are H, (substituted) alkyl or (substituted) alkoxy, halogen, alkylthio, alkylamino or dialkylamino and R5, R6 are H or alkyl, and their salts with acids or bases, are prepared by reacting compounds of the formula II STR2 with compounds of the formula III STR3
- -
-
-
- Acid-catalysed Aromatisation of Benzene cis-1,2-dihydrodiols: a Carbocation Transition State poorly stabilised by Resonance
-
Acid-catalysed dehydration of 3-substituted benzene cis-1,2-dihydrodiols exhibits a Hammett plot with ρ=-8.2, consistent with reaction via a benzenonium ion-like intermediate; however, correlation of +M resonance substituents such as Me and MeO by ?p rather than ?+ constants indicates a marked imbalance between resonance and inductive stabilisation of the transition state.
- Boyd, Derek R.,Blacker, John,Byrne, Briege,Dalton, Howard,Hand, Mark V.,et al.
-
p. 313 - 314
(2007/10/02)
-
- 16-Substituted polyunsaturated hexadecanoic fatty acids
-
Sixteen carbon atom carboxylic acids having 16-phenoxy or 16-phenylthio substituents, and 0, 1, or 4 triple bonds, methods of preparing them, and pharmaceutical preparations containing them. These compounds are useful as lipoxygenase inhibitors.
- -
-
-
- The Baeyer-Villiger Oxidation of Aromatic Aldehydes and Ketones with Hydrogen Peroxide Catalyzed by Selenium Compounds
-
A series of organoselenium compounds was investigated as activators of hydrogen peroxide in the Baeyer-Villiger oxidation.As a result, a convenient and cheap method for transformation of aromatic aldehydes, having polycondensed ring systems or electron-donating substituents, and polymethoxy derivatives of acetophenone, into phenols was elaborated.This method utilizes hydrogen peroxide activated by areneseleninic acids, as oxidizing agent.
- Syper, Ludwik
-
p. 167 - 172
(2007/10/02)
-
- Process for the preparation of 3,4-dialkoxyanilines
-
A new process for the production of 3,4-dialkoxyanilines in which the two alkyl groups are different from each other is disclosed. The process comprises the stepwise introduction of the alkyl groups in different stages of the process by converting pyrocatechol into its monoalkyl ether, coupling said monoalkyl ether with a phenyldiazonium salt, alkylating the 3-alkoxy-4-hydroxy-azobenzene obtained to form 3,4-dialkoxyazobenzene and reductively cleaving the latter to the corresponding 3,4-dialkoxyaniline. The 3,4-dialkoxyanilines obtainable by the new process are valuable intermediates for the preparation of 4-hydroxy-6,7-dialkoxy-3-quinoline carboxylic acid esters which are excellent coccidiostats.
- -
-
-
- Production of alkoxy phenolic compounds
-
Alkoxy phenols such as o-methoxyphenol (guaiacol) and o-ethoxyphenol are prepared from substituted cycloaliphatic ketones by dehydrogenation thereof in the presence of a Group VIII noble metal catalyst, preferably palladium supported on carbon, at a temperature of 150° C., to 250° C. The reaction is carried out neat or in the liquid phase using an alicyclic ester reaction solvent having a boiling point ranging from about 150° C., to 250° C. The substituted cycloaliphatic ketone reactant, such as 2-chlorocyclohexanone is prepared by chlorination of cyclohexanone with subsequent conversion of the 2-chlorocyclohexanone to the alkoxy-cyclohexanone compound which is dehydrogenated.
- -
-
-
- Method for the production of alkoxycyclohexanones
-
Alkoxy phenols such as o-methoxyphenol (guaiacol) and o-ethoxyphenol are prepared from substituted cycloaliphatic ketones by dehydrogenation thereof in the presence of a Group VIII noble metal catalyst, preferably palladium supported on carbon, at a temperature of 150° to 250° C. The reaction is carried out neat or in the liquid phase using an alicyclic ester reaction solvent having a boiling point ranging from about 150° to 250° C. The substituted cycloaliphatic ketone reactant, such as 2-chlorocyclohexanone is prepared by chlorination of cyclohexanone with subsequent conversion of the 2-chlorocyclohexanone to the alkoxy-cyclohexanone compound which is dehydrogenated.
- -
-
-
- Method for manufacture of dihydric phenols
-
Dihydric phenols are produced preferentially in high yields by having monohydric phenols or phenyl ethers oxidized by an organic peracid using, as a catalyst, at least one member selected from the group consisting of peracid stabilizers, polycarboxylic acids containing N or OH and possessed of a structure from which heavy metal ion-chelating property can theoretically be assumed, magnesium salts, sodium salts and potassium salts thereof, sodium salt, potassium salt and lower alkyl esters of phosphoric acid, and sodium salt and lower alkyl esters of pyrophosphoric acid.
- -
-
-