作者:K. Sarkunam、M. Nallu
DOI:10.1002/jhet.5570420102
日期:2005.1
The reaction between 4-dimethylaminopyridine (DMAP) and 2-bromoacetophenone(s) readily gives 1- [2-(4-substitutedphenyl)-2-oxoethyl]-4-(dimethylamino)pyridinium bromide (1–14). Action of aqueous NaOH on 1–8 generates the corresponding pyridinium ylide (15–22), which is isolated as a colored stable crystalline solid. Addition of 15–22 to dimethylacetylene dicarboxylate (DMAD) gives dimethyl 3-(subs
4-二甲基氨基吡啶(DMAP)与2-溴苯乙酮之间的反应可轻松制得1- [2-(4-取代苯基)-2-氧代乙基] -4-(二甲基氨基)吡啶鎓溴化物(1-14)。NaOH水溶液对1–8的作用生成相应的吡啶鎓叶立德(15–22),将其分离为有色稳定的结晶固体。将15-22加到二甲基乙炔二羧酸酯(DMAD)中,可以以46-62%的收率得到3-(取代的苯甲酰基)-7-(二甲氨基)吲哚嗪-1,2-二羧酸二甲酯(23-30)。