A Three-Component Coupling Process Based on Vicarious Nucleophilic Substitution (VNS<sub>AR</sub>)−Alkylation Reactions: An Approach to Indoprofen and Derivatives
作者:Nicholas J. Lawrence、John Liddle、Simon. M. Bushell、David A. Jackson
DOI:10.1021/jo0159901
日期:2002.1.1
The intermediate anion derived from the vicarious nucleophilic substitution (VNS) of hydrogen reacts with a series of alkyl halides to generate the corresponding alpha-alkylated conventional VNS product in a one-pot process. This one-pot VNS-alkylation reaction offers a convenient route to a range alpha-substituted nitrobenzyl phosphine oxides, sulfones, and esters via a three-component coupling reaction
Vicarious nucleophilic substitution of hydrogen to the nitro group by tertiary carbanions of α-chloroalkyl phenyl sulphones1
作者:BogusŁaw Mudryk、MieczysŁaw Makosza
DOI:10.1016/s0040-4020(01)85108-5
日期:1988.1
The tertiary carbanions of α-chloroalkyl phenyl sulphones readily enter the vicarious nucleophilicsubstitution of hydrogen ortho to the nitro group with a number of 4- and 3- substitutednitrobenzenes, when potassium tert-butoxide/DMF base-solvent system at -40°C + -30°C is employed.