Homolytic Substitution and Carbenoidic Reactions in the Preparation of Benzimidazole Derivatives of Pharmaceutical Interest: Synthesis and Properties of (2-Cycloalkyl-1-benzimidazolyl)-N,N-diethylacetamides
作者:Roberto Pellicciari、Renata Fringuelli、Benedetto Natalini、Leonardo Brucato、Anna Rita Contessa
DOI:10.1002/ardp.19853180503
日期:——
7a–d are (i) the homolytic cycloalkylation of benzimidazole, in which the silver‐catalyzed oxidative decarboxylation of the cycloalkanecarboxylic acids 1a–d by peroxydisulfate is used as a source of alkyl radicals, and (ii) the N‐alkylation of benzimidazole by the ethoxycarbonylcarbenoid generated by the copper bronze‐catalyzed decomposition of ethyl diazoacetate.
描述了(2-环烷基-1-苯并咪唑基)-N,N-二乙基乙酰胺7a-e的制备和初步生物学评价。制备化合物 7a - d 的关键步骤是 (i) 苯并咪唑的均裂环烷基化,其中银催化的环烷羧酸 1a - d 被过二硫酸盐氧化脱羧作为烷基自由基的来源,以及 (ii) ) 由铜青铜生成的乙氧基羰基卡宾对苯并咪唑进行 N-烷基化-催化重氮乙酸乙酯分解。