On the Vilsmeier formylation of N-aryl-substituted 2-aminothiophenes - a simple route to new thieno[2,3-b]quinolinium salts
作者:Horst Hartmann
DOI:10.3998/ark.5550190.0013.325
日期:——
The Vilsmeier reaction of N-substituted 2-arylamino-thiophenes-5-carboxylic acid or their alkyl derivatives gives rise, depending on the substitution pattern at the thiophene moiety, to the formation of either N-substituted 2-arylamino-thiophene-5-carbaldehydes, corresponding imminium salt precursors, or novel thieno[2,3-b]quinolinium salts. These salts are highly reactive towards nucleophiles and
N-取代的 2-芳基氨基-噻吩-5-羧酸或其烷基衍生物的 Vilsmeier 反应产生,取决于噻吩部分的取代模式,形成 N-取代的 2-芳基氨基-噻吩-5-甲醛、相应的亚胺盐前体或新型噻吩并 [2,3-b] 喹啉盐。这些盐对亲核试剂具有高度反应性,并且可以通过还原轻松转化为相应的 4,9-二氢衍生物。