Vicarious nucleophilic substitution of hydrogen (VNS) in 1,4-naphthoquinone derivatives—competition between VNS and vinylic nucleophilic substitution (SNV)
作者:Mieczysław Mąkosza、Shamil Nizamov
DOI:10.1016/s0040-4020(01)00962-0
日期:2001.11
Carbanions of dimethyl chloromalonate, ethyl 2-chloroacetoacetate and dimethyl malonate react with naphthoquinone derivatives mainly via vicarious nucleophilic substitution or oxidative nucleophilic substitution of hydrogen processes. These reactions in 2-halo substituted naphthoquinones are generally faster processes than vinylic nucleophilic substitution of halogen (SNV). Introduction of one Cl substituent