The reaction of primary aromatic amines with alkylene carbonates for the selective synthesis of bis-N-(2-hydroxy)alkylanilines: the catalytic effect of phosphonium-based ionic liquids
Dichotomous Reactivity in the Reaction of Triethyl- and Triphenylphosphane HBr Salts with Dimethyl Acetals: A Novel Entry to α-Alkoxy-Functionalized Ylides and General Synthesis of Vinyl Ethers and Alkoxy Dienes
作者:Priyabrata Das、James McNulty
DOI:10.1002/ejoc.201000601
日期:2010.7
discovery of dichotomousreactivity in the reaction of trialkyl- vs. triphenylphosphaneHBrsalts with acetals allows entry to functionalized α-methoxy phosphonium salts and a novel process for tertiary phosphane methylation. The new protocol opens a generalentry to the synthesis of vinylethers and differentially substituted 1,3-dienes via Wittig reactions of the functionalized ylides derived from
[EN] DISILANE-, CARBODISILANE-AND OLIGOSILANE CLEAVAGE WITH CLEAVAGE COMPOUND ACTING AS CATALYST AND HYDROGENATION SOURCE<br/>[FR] CLIVAGE DE DISILANE, DE CARBODISILANE ET D'OLIGOSILANE AVEC UN COMPOSÉ DE CLIVAGE AGISSANT EN TANT QUE CATALYSEUR ET SOURCE D'HYDROGÉNATION
申请人:MOMENTIVE PERFORMANCE MAT INC
公开号:WO2019060481A1
公开(公告)日:2019-03-28
The invention relates to a process for the manufacture of monosilanes of formula (I): MexSiHyClz (I), comprising: the step of subjecting a silane substrate (methyldisilanes, methyloligosilanes, or carbodisilanes) to a cleavage reaction of the silicon-silicon bond(s) or the silicon- carbon bonds in silane substrates the reaction involving a cleavage compound selected from a quaternary Group 15 onium compound R4 QX, a heterocyclic amine, a heterocyclic ammonium halide, or a mixture of R3P and RX. The starting material disilanes to be cleaved has the formula (II): MemSi2HnClo (II) The starting material oligosilanes to be cleaved have the general formula (III): MepSiqHrCIs (II I), The starting material carbodisilanes to be cleaved have the general formula (IV): (MeaSiHbCle)-CH2-(MecSiHdClf) (IV)
[EN] SYNTHESIS OF ORGANOHALOSILANE MONOMERS FROM CONVENTIONALLY UNCLEAVABLE DIRECT PROCESS RESIDUE<br/>[FR] SYNTHÈSE DE MONOMÈRES ORGANOHALOSILANES À PARTIR D'UN RÉSIDU DE TRAITEMENT DIRECT CLASSIQUEMENT NON CLIVABLE
申请人:MOMENTIVE PERFORMANCE MAT INC
公开号:WO2013101619A1
公开(公告)日:2013-07-04
Disclosed herein is a catalytic process for the synthesis of organohalosilane monomers from tetraorganodihalodisilanes and other compounds that are not cleaved during the conventional hydrochlorination of Direct Process Residue. The process is characterized by the use of a catalyst containing (1) one or more heterocyclic amines and/or one or more heterocyclic ammonium halides, and (2) one or more quaternary Group 15 onium compounds.
PROCESS FOR THE PREPARATION OF ONIUM SALTS WITH ALKYL- OR ARYLSULFONATE ANIONS OR ALKYL- OR ARYLCARBOXYLATE ANIONS HAVING A LOW HALIDE CONTENT
申请人:Ignatyev Nikolai (Mykola)
公开号:US20090253905A1
公开(公告)日:2009-10-08
The invention relates to a method for producing onium salts comprising alkyl anions or aryl sulfonate anions or alkyl carboxylate anions or acryl carboxylate anions by reacting an onium halide with an alkyl silyl ester or trialkyl silyl ester of an alkyl sulfonic acid or aryl sulfonic acid or an alkyl carboxylic acid or aryl carboxylic acid or the anhydrides thereof.