烷基化
化学
烷基
溴化苄
光催化
食腐动物
催化作用
溴化物
药物化学
光催化
激进的
组合化学
有机化学
光化学
作者
Shyamal Pramanik,Partha Pratim Mondal,Soumitra Maity
标识
DOI:10.1021/acs.joc.3c01757
摘要
Herein, we disclose a simple strategy for the C–H alkylation of electron-rich (hetero)arenes with alkyl bromides employing visible-light-mediated organo-photocatalytic SET processes. The generality of this method has been evidenced by the inclusion of a variety of alkyl radicals (α-alkyl-carbonyl, benzyl, cyanomethyl) as well as diverse biologically active electron-rich arenes and (hetero)arenes under mild conditions. The extent of alkylation with alkyl bromides was found to be controlled by introducing Zn(OAc)2 as a bromide scavenger, ensuring the blocking of potential bromo-arene byproduct formation under photoredox conditions. In addition, a sequential C–H alkylation strategy for selective bis-alkylation has also been developed via chronological incorporation of different alkyl radical precursors in one pot quite efficiently.
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