- Synthesis of 2-γ-N-(aminoethyl)aminopropyl-2-methyl-6-alkyl(aryl,H)-1,3-dioxa-6- aza-2-silacyclooctanes
-
Some new 2-γ-N-(aminoethyl)aminopropyl-2-methyl-1,3-dioxa-6-aza-2- silacyclooctane and 2-γ-N-(aminoethyl)aminopropyl-2-methyl-6-alkyl(aryl)-1,3-dioxa-6-aza- 2-silacyclooctanes have been synthesized from γ-chloropropyldimethoxymethyl silane by ethylenediamine substitution and diethanolamine or N-alkyl(aryl)diethanolamines substitution. The resulting silocanes have been characterized by elemental analyses, IR, and 1H NMR.
- Yang,Lin,Li
-
-
Read Online
- High-yield industrial synthesis method N - n-butyl diethanol amine
-
The invention discloses a high-yield industrial synthesis method N - n-butyl diethanol amine, which belongs to the field of synthesis of a bonding agent, and sequentially comprises the following steps: (1) adding diethanolamine, bromon-butane and an acid-binding agent into a solvent and refluxing. (2) The reaction system was filtered while hot, and the filtrate was distilled under reduced pressure to recover the solvent. (3) The solvent-removed mixture is rectified to obtain the desired product. The compound solid propellant bonding agent is simple and convenient to synthesize and operate, high in yield, low in cost and the like, and is suitable for improving the elongation and low-temperature mechanical properties of the solid propellant more effectively by using AP as an oxidizing agent-based composite solid propellant bonding agent.
- -
-
Paragraph 0016-0020
(2021/09/29)
-
- A butyl diethanolamine synthetic method
-
The invention belongs to the field of organic synthesis, in particular relates to a butyl diethanolamine synthetic method, comprises the following steps: (1) diethanolamine with butyraldehyde reaction generates a second ethanol butyl imine; (2) two ethanol-butyl imine reacts with hydrogen to produce butyl diethanolamine. The method of the invention the catalyst that is used for ordinary, cheap and easy to obtain. The hydrogen reduction adopting the common high-pressure autoclave (pressure 10.0 mpa) equipment of the price is cheap, easily purchased. The method of the invention has industrial application value. The products of this invention have high yield, and high purity of the product. Synthesis method of the invention the process is simple, easy separation for products. By a simple fractionation can realize the separation of the product.
- -
-
Paragraph 0039; 0040; 0043; 0044
(2019/06/30)
-
- METHOD FOR PRODUCING CIS- AND TRANS-ENRICHED MDACH
-
A process for preparing trans-enriched MDACH, including: distilling an MDACH starting mixture in the presence of an auxiliary, which is an organic compound having a molar mass of 62 to 500 g/mol, a boiling point at least 5° C. above the boiling point of cis,cis-2,6-diamino-1-methylcyclohexane, and 2 to 4 functional groups, each of which is independently an alcohol group or a primary, secondary or tertiary amino group. The MDACH starting mixture includes 0 to 100% by weight of 2,4-MDACH and 0 to 100% by weight of 2,6-MDACH, based on the total amount of MDACH present in the MDACH starting mixture. The MDACH starting mixture includes both trans and cis isomers. Trans-enriched MDACH includes 0 to 100% by weight of 2,4-MDACH and 0 to 100% by weight of 2,6-MDACH, where the proportion of trans isomers in the mixture is higher than the proportion of trans isomers in the MDACH starting mixture.
- -
-
-
- Synthesis and characterization of rhenium(III) complexes with (Ph2PCH2CH2)2NR diphosphinoamine ligands
-
The synthesis and characterization of a new series of neutral, six-coordinated compounds [ReIIIX3(PNPR)], where X is Cl or Br and PNPR is a diphosphinoamine having the general formula (Ph2PCH2CH2)2NR (R = H, CH3, CH2CH3, CH2CH2CH3, CH2CH2CH2CH3 and CH2CH2OCH3) are reported. Stable [ReIIIX3(PNPR)] complexes were synthesized, in variable yields, starting from precursors where the metal was in different oxidation states (iii and v), by ligand-exchange and/or redox-substitution reactions. The compounds were characterized by elemental analysis, proton NMR spectroscopy, cyclic voltammetry, UV/vis spectroscopy, positive-ion electrospray ionization mass spectrometry (ESI(+)-MS) and X-ray diffraction analysis. Although the formulation of the complexes allows either meridional or facial isomers, the latter arrangement was prevalent both in the solid and solution states. Only [ReCl3(PNPH)] showed a meridional configuration both in solution and in the crystalline state. [ReBr3(PNPme)] prefers the meridional configuration in the crystalline state and the facial one in solution. While ESI(+)-MS and voltammetric data seem to indicate some dependency from the nature of the alkyl substituent at the nitrogen, the available structural data of the complexes show only slight differences both for angles and bond lengths upon change of the alkyl chain tethered to the nitrogen.
- Salvarese, Nicola,Refosco, Fiorenzo,Seraglia, Roberta,Roverso, Marco,Dolmella, Alessandro,Bolzati, Cristina
-
supporting information
p. 9180 - 9191
(2017/07/24)
-
- Alkynyl quaternary ammonium salt multifunctional surfactants and preparation method thereof
-
The invention discloses a series of alkynyl quaternary ammonium salt multifunctional surfactants and a preparation method thereof. A structural formula of quaternary ammonium salt is shown in the description, wherein R represents a C4-C22 linear, branched or cycloalkyl, aryl or alkenyl group. The preparation method comprises the following steps: (1) carrying out alkylation on ethanol amine under alkaline and acetonitrile reflux conditions by virtue of bromo-hydrocarbon; and (2) carrying out further alkylation on tertiary amine under an ethanol reflux condition by virtue of propargyl bromide, so as to obtain alkynyl quaternary ammonium salt, namely reddish brown semitransparent viscous liquid or solid. The alkynyl quaternary ammonium salt multifunctional surfactants have very high surface activity, good corrosion resistance and excellent viscoelasticity, the preparation method is simple and feasible, the raw material cost is low, the operation is easy, the yield is high, and the surfactants are environmentally friendly.
- -
-
Paragraph 0032-0038
(2017/05/02)
-
- Aza-crown ether complex cation ionic liquids: Preparation and applications in organic reactions
-
Aza-crown ether complex cation ionic liquids (aCECILs) were devised, fabricated, and characterized by using NMR spectroscopy, MS, thermogravimetric differential thermal analysis (TG-DTA), elemental analysis and physical properties. These new and room-temperature ILs were utilized as catalysts in various organic reactions, such as the cycloaddition reaction of CO2 to epoxides, esterification of acetic acid and alcohols, the condensation reaction of aniline and propylene carbonate, and Friedel-Crafts alkylation of indole with aldehydes were investigated carefully. In these reactions, the ionic liquid exhibited cooperative catalytic activity between the anion and cation. In addition, the aza-[18-C-6HK][HSO4]2 was the best acidic catalyst in the reactions of esterification and Friedel-Crafts alkylation under mild reaction conditions. Jewel in the crown: Nine new and room-temperature aza-crown ether complex ionic liquids (aCECILs) composed of multiple cations and anions were fabricated through a convenient procedure (see scheme). Some of them were used as catalysts in various organic reactions, such as the cycloaddition reaction of CO2 to propylene oxide, esterification of acetic acid and alcohols, the condensation of aniline and propylene carbonate, and Friedel-Crafts alkylation of indole with aldehydes.
- Song, Yingying,Cheng, Chen,Jing, Huanwang
-
p. 12894 - 12900
(2015/03/30)
-
- Process For Preparing Alkylalkanolamines
-
The present invention relates to a process for preparing alkylalkanolamines, comprising the reaction of a carbonyl-based compound with a hydroxylalkylamine, in the presence of hydrogen and a catalyst.
- -
-
Page/Page column 7
(2012/05/20)
-
- Process for preparing esterquats
-
A process for preparing an esterquat composition comprising (a) reacting a tertiary amine according to formula I: wherein R1represents a C3-C6hydrocarbon group, R2represents a C3-C6hydrocarbon group, a —R4—OH group or a —CH2[CH(OH)]nCH2OR5group, if R2represents a C3-C6hydrocarbon group, R3represents a —R4—OH group or a —CH2[CH(OH)]nCH2OR5group, if R2represents a —R4—OH group, R3represents a —R4—OH group or a —CH2[CH(OH)]nCH2OR5group, if R2represents a —CH2[CH(OH)]nCH2OR5group, R3represents a —CH2[CH(OH)]nCH2OR5group, R4represents a C2-C4hydrocarbon group, n is 1-4, and R5represents H or a C1-C30hydrocarbon group, with a C3-C6hydrocarbyl halide or a di(C3-C6) hydrocarbyl sulfate, followed by (b) reaction with a C8-C30acid halide, with the proviso that at least one hydroxy group is esterified. Additionally, there are compositions comprising this esterquat and the use of such compositions as a gas hydrate growth inhibitor.
- -
-
-
- Catalyst and the amination of alcohols under hydrogenating conditions
-
Catalysts whose active material contains, in addition to from 20 to 85% by weight, calculated as ZrO2, of oxygen-containing zirconium compounds, from 1 to 30% by weight, calculated as CuO, of oxygen-containing compounds of copper and from 1 to 40% by weight each, calculated as CoO or NiO, respectively, of oxygen-containing compounds of cobalt and of nickel are used for the amination of alcohols under hydrogenating conditions.
- -
-
-
- Synthesis and Mesogenic Properties of N-n-alkyl-N'-(4-n-Pentyloxyphenyl)-Piperazines
-
The N-n-alkyl-N'-(4-n-pentyloxyphenyl)-piperazines (4) exhibit ordered smectic phases at temperatures below 100 deg C.For 3, 4, 5 and 6 carbons in the alkyl chain, two smectic phases are present and for 7, 8 and 9 carbons only one smectic phase is present.The ΔH values for 4, 5, 6 and 7 carbons are anomalous.From optical and X-ray data, the smectic phases are identified as probably smectic E and B phases.
- Zuniga, H.,Bartulin, J.,Ramirez, A.,Muller, H.,Taylor, T. R.
-
p. 131 - 140
(2007/10/02)
-
- LARIAT ETHERS. 3. MACROCYCLIC POLYETHERS BEARING DONOR GROUPS ON FLEXIBLE ARMS ATTACHED AT A NITROGEN PIVOT POINT
-
The binding of lariat ethers utilizing a nitrogen pivot atom for the donor sidearm is enhanced considerably relative to the carbon-based systems and this may be explicable in terms of diminished "sidedness."
- Schultz, Rose Ann,Dishong, Dennis M.,Gokel, George W.
-
p. 2623 - 2626
(2007/10/02)
-
