Competition entre substitution nucleophile et reduction chez les bromo-9 anthracenes dans l'action des anions phenate et methylate
作者:J. Rigaudy、A.M. Seuleiman、Nguyen Kim Cuong
DOI:10.1016/0040-4020(82)80052-5
日期:1982.1
potassium phenoxide in DMF gives rise to a competitionbetweennucleophilicsubstitution and reductivedehalogenation. Derivatives carrying electron attracting groups, 1c (Br), 1e (CN) and 1f (NO2), react essentially by substitution leading to phenolic ethers 2, whereas with non-activated bromides, 1a (H), 1b (C6H5) and 1d (OC6H5), the main reaction is a reduction to anthracenes 3 which should arise from
用DMF中的苯酚钾处理α位不带氢的内取代的9-溴蒽在亲核取代和还原脱卤之间引起竞争。带有电子吸引基团1c(Br),1e(CN)和1f(NO 2)的衍生物基本上通过取代反应生成酚醚2,而与未活化的溴化物1a(H),1b(C 6 H 5))和1d(OC 6 H 5),主要反应是还原为蒽3 这应该是由电子转移引起的。