- High-efficiency preparation method of long-chain alkyl salicylaldehyde (by machine translation)
-
The invention provides a preparation method: a long-chain alkyl salicylaldehyde. The long-chain alkyl phenol and paraformaldehyde react under the conditions of organic amine, magnesium salt, solvent and temperature and the like, and corresponding long-chain alkyl salicylaldehyde. The conversion rate of the 96% method is equal to or higher, the product separation is convenient, the used magnesium salt is usually industrial waste, the cost is low, and the method is convenient to recycle and recycle. The obtained compound is an organic intermediate with important application value, and plays an important application in the field of non-ferrous metal smelting and surface active agents and the like. (by machine translation)
- -
-
Paragraph 0032-0035
(2019/10/01)
-
- A METHOD FOR THE PREPARATION OF ALKYLSALICYLALDEHYDE AND ALKYLSALICYLALDOXIME, AND USE THEREOF
-
The invention relates to an improved method for the preparation of alkylsalicylaldehyde or its corresponding metallic salts. The invention also relates to a method for the preparation of alkylsalicylaldoxime by reacting said alkylsalicylaldehyde or its corresponding metallic salts with hydroxylamine or its salt. The invention also relates to a method for extracting a metal in an aqueous solution containing dissolved metal.
- -
-
Page/Page column 14-15
(2017/02/09)
-
- Synthesis and antimicrobial screening of some novel chalcones and flavanones substituted with higher alkyl chains
-
As a part of our program to generate some novel flavonoid frameworks substituted with higher alkyl groups as possible antimicrobial agents, we have in total synthesized twelve novel chalcones (11-16) and their corresponding flavanones (17-22) substituted with either nonyl or dodecyl chains in ring B in very good to excellent yields. The synthesized compounds have been screened for their antimicrobial potential against six bacterial and four fungal strains. The tested compounds, in general, showed significant antibacterial and comparable antifungal activities. While the chalcone (16) with a dodecyl chain showed highly promising antibacterial activity against almost all the organisms tested, the chalcone (13) with nonyl chain showed promising antifungal activity against Candida rugosa and Aspergillus niger strains.
- Mallavadhani, Uppuluri Venkata,Sahoo, Laxmidhar,Kumar, Koochana Pranay,Murty, Upadyayula Suryanarayana
-
p. 2900 - 2908
(2014/05/06)
-
- Polyacidic multiloading metal extractants
-
Novel polynucleating, di- and tri-acidic ligands have been designed to increase the molar and mass transport efficiencies for the recovery of base metals by solvent extraction. The Royal Society of Chemistry.
- Gordon, Ross J.,Campbell, John,Henderson, David K.,Henry, Dorothy C. R.,Swart, Ronald M.,Tasker, Peter A.,White, Fraser J.,Wood, Jenny L.,Yellowlees, Lesley J.
-
supporting information; experimental part
p. 4801 - 4803
(2009/03/12)
-
- A NOVEL PROCESS FOR THE MANUFACTURE OF 5-NONYL SALICYLALDOXIME
-
The invention relates to a process for producing 5-nonyl salicylaldoxime that comprises of converting nonyl phenol to a 5-nonyl aldehyde in a two-step reaction using a novel catalyst mixture, followed by the oximation of the said aldehyde using hydroxylamine sulphate, and that the said catalytic process of aldehyde production is the main invention, in that the effective use of the catalyst mixture helps the reaction proceed at a faster and controlled rate which leads to a higher yield of aldehyde, as a result of complete conversion of all the reactants to the final products.
- -
-
Page/Page column 7-9
(2010/11/26)
-
- The synthesis of 2-hydroxymethyl derivatives of phenols
-
2-Hydroxymethylphenols have been prepared in good yield by reduction with sodium borohydride of the precursor aldehydes, obtained regiospecifically from reaction of phenols with paraformaldehyde in toluene containing stannic chloride and tri-n-butylamine. By contrast, reaction of phenols with either paraformaldehyde under anhydrous conditions or with aqueous formaldehyde results in formation of both the hydroxymethyl and the bishydroxymethyl derivatives. Cyclic acetals of the precursor aldehydes are readily accessible.
- Payne, Peter,Tyman, John H. P.,Mehet, Satinder K.,Ninagawa, Akira
-
p. 402 - 405
(2007/10/03)
-
- Zwitterionic macrocyclic metal sulfate extractants containing 3-dialkylaminomethylsalicylaldimine units
-
10,25-Di-tert-alkyl-14,21-dimethyl-3,6,14,21-tetraazatricyclo[21.3.1.18, 12]octacosa-1(27),2,6,8,10,12(28),23,25-octaene-27,28-diol macrocycles form Ni(II) and Cu(II) complexes in which the metal cation and the sulfate anion are bound in separated sites in a zwitterionic form of the ligand. The nonyl-substituted macrocycle shows a higher affinity for SO42- and a lower binding strength for Cu2+ than open chain analogues, the pH-dependences for which fall in ranges which allow loading of CuSO4 at pH ≈4 and easy stripping to recycle the ligand. X-Ray structure determinations of the Cu(II) and Ni(II) sulfate complexes of the tert-butyl substituted ligand suggest that the de-tuning of M2+-binding results from a distortion from planarity of the "salen" N2O22- donor set imposed by the incorporation of the hexamethylene strap in the ligand and reveal that the sulfate is bound as a hydrate in a 2:2:2:2, ligand-M2+-SO42--H2O, assembly.
- Plieger, Paul G.,Tasker, Peter A.,Galbraith, Stuart G.
-
p. 313 - 318
(2007/10/03)
-
- The separation and synthesis of lipidic 1,2- and 1,3-diols from natural phenolic lipids for the complexation and recovery of boron
-
A study has been made of the semi-synthesis of 1,3-diols (anacardic alcohols) from natural phenolic lipid resources from Anacardium occidentale and Anacardium giganteum which have given C15 and C11 derivatives, respectively. An isomeric 1,3-diol (isoanacardic alcohol) has been obtained from cardanol separated from technical cashew nut-shell liquid. Homologous1,3-diols have been synthesised from a range of synthetic 2-alkyl-, 3-alkyl- and 4-alkylphenols and from 6-alkylsalicylic acids. The natural 1,2-diol, urushiol, from Rhus vernicifera has been purified. All these lipidic compounds have been studied for their complexation and the potential recovery of boron as boric acid.
- Tyman, John H.P.,Mehet, Satinderjit K.
-
p. 177 - 199
(2007/10/03)
-
- Process for the preparation of 2-hydroxyarylaldehydes under reduced pressure
-
A method for the preparation of a 2-hydroxyarylaldehyde which comprises reacting a magnesium bis-hydrocarbyloxide, derived at least in part from a hydroxyaromatic compound having at least one free position ortho to the hydroxyl group, with formaldehyde or a formaldehyde-liberating compound under substantially anhydrous conditions at a pressure of from 50 to 700 mm Hg absolute.
- -
-
-
- Chemical process for the preparation of a 2-hydroxyarylaldehyde
-
A method for the preparation of a 2-hydroxyarylaldehyde which comprises reacting an aryloxymagnesium halide derived from a phenol having at least one free ortho position relative to the phenolic hydroxy group with formaldehyde or a formaldehyde-liberating compound under substantially anhydrous conditions in the presence of a polar organic solvent other than hexamethylphosphoramide or 1,3-dimethyl-3,4,5,6-2(1H)-pyrimidone.
- -
-
-
- Process for the preparation of 2-hydroxyarylaldehydes
-
A method for the preparation of a 2-hydroxyarylaldehyde which comprises reacting a magnesium bis-hydrocarbyloxide derived at least in part from a hydroxyaromatic compound having at least one free position ortho to the hydroxyl group with formaldehyde or formaldehyde-liberating compound under substantially anhydrous conditions.
- -
-
-
- Process for making 2-hydroxymandelic acid and 2-hydroxybenzaldehydes
-
A method for the preparation of a 2-hydroxymandelic acid of the formula STR1 wherein R represents an alkyl radical containing from 7 to 12 carbon atoms which comprises reacting glyoxylic acid with a phenol of the formula: STR2 under acid conditions. Oxidation of the 2-hydroxymandelic acid to the corresponding 2-hydroxybenzaldehyde is also described.
- -
-
-
- Process for preparing o-hydroxyarylaldehydes
-
A process for the manufacture of o-hydroxyarylaldehydes which comprises the steps of (1) oxidizing a 2-arylaminomethylphenol, optionally substituted in the phenolic ring by one or more alkyl groups, to the corresponding optionally substituted 2-hydroxybenzylidenearylamine which (2) is hydrolyzed to the corresponding optionally substituted o-hydroxybenzaldehyde.
- -
-
-