Alpha-Alkylation by SN1-Type ReactionsAlpha-Alkylation by SN1-Type ReactionsBrønsted acidscarbocationschiral thioureasenamine catalysisLewis acidsorganocatalysisThis chapter contains sections titled: * SN1-Type Nucleophilic Reaction by Generation of Carbocations * Organocatalytic Stereoselective SN1-Type Rea...
Shim, Ruthenium-catalyzed regioselective alpha-alkylation of ketones with primary alcohols, Tetrahedron Lett., 2002, 43, 7987-7989.Chan Sik Cho,Bok Tae Kim,Myung Jin Lee,Tae-Jeong Kim,Sang Chul Shim. Ruthenium-Catalyzed Regioselectiveα-Alkylation of Ketones: The First Alkyl-Group Transfer from...
摘要: A process for alkylating the alpha position of the 8-acyl side chain in mevinolin and analogs thereof is disclosed. The process proceeds with a single charge of base and alkyl halide to give products with a pharmaceutically acceptable purity....
The direct α-alkylation of ketones with alcohols has emerged as a new green protocol to construct CC bonds with H2O as the sole byproduct. In this work, a very simple and convenient Pd/C catalytic system for the direct α-alkylation of ketones with primary alcohols in pure water is develo...
phase transfer catalysis;asymmetric catalysis;salen complexes;alkylation;amino acids 1. Introduction Chiral salen transition metal complexes have a significant role in the stereoselective synthesis being efficient chiral catalysts usable in a plethora of asymmetric transformations [1,2,3,4]. Their simple ...
Note: If you have problems viewing the PDF, please make sure you have the latest version of Adobe Acrobat. Back to full textHome Search Services Contact us © 2004-2024 FreePatentsOnline.com. All rights reserved. Privacy Policy & Terms of Use....
摘要: A process for the alpha -monoalkylation of arylacetonitriles, arylacetoesters and arylacetic acids with dialkyl carbonates in liquid phase, in the presence of bases at temperatures ranging from about 100 DEG C to about 270 DEG C.收藏...
青云英语翻译 请在下面的文本框内输入文字,然后点击开始翻译按钮进行翻译,如果您看不到结果,请重新翻译!Alkylation of 5-substituted tetrazoles with .alpha.-chlorocarbonyl compounds选择语言:从 到 翻译结果1翻译结果2 翻译结果3翻译结果4翻译结果5 翻译结果1复制译文编辑译文朗读译文返回顶部 5 - 取代四唑与。
ChemInform Abstract: REDUCTION AND REDUCTIVE ALKYLATION OF ALPHA-TERT.-BUTYLTHIO CARBONYL COMPOUNDS, AN EFFICIENT METHOD FOR STEPWISE ALPHA-ALKYLATION OF ESTERS... S.,KAMATA,S.,... - 《Chemischer Informationsdienst》 被引量: 0发表: 1974年 ChemInform Abstract: REDUCTION AND REDUCTIVE ALKYLATION OF ...
(thio)urea alpha-aminoalkylation with isobut - yraldehyde and sec aminesN,N'-disubstd. (thio)ureas, useful as vulcanisation accelerators, rubber stabilisers, textile assistants and lubricating oil additives, have formula X=C(NH-CH(CH-(CH3)2)NRR')2 (where R and R' are 1-4C alkyl or...