苯并吡喃。第42部分†。氨存在下4-Oxo-4 H -1-苯并吡喃-3-甲醛与某些活性亚甲基化合物的反应
摘要:
在氨存在下的标题醛1分别与乙酰丙酮,丙二酸二乙酯和氰基乙酸乙酯,以及(或甲基)-1-苯并吡喃并[4,3 - b ]吡啶-丁-3-羧酸酯分别给出吡啶衍生物9-11 22(或23)用乙酰乙酸乙酯(或甲基)。用氨预处理的乙酰丙酮与1缩合,得到稠合的吡啶24。氨将酯6转化为吡啶13或14。22和23的铬酸氧化分别提供香豆素吡啶25和26。
Synthesis of Some New Heterocyclic Compounds Derived from 3-Formylchromones and Their Antimicrobial Evaluation
作者:A. Bari、S. S. Ali、A. Kadi、I. A. Hashmi、S. W. Ng
DOI:10.1007/s10593-014-1424-4
日期:2014.3
The synthesis and antimicrobial evaluation of a series of chromone-linked substituted heterocyclic derivatives is described. The condensation of 3-formylchromone with acetoacetamide under Knoevenagel–Cope reaction conditions was also explored, and the condensation with 4-hydroxy-6-methyl-2H-pyran-2-one constitutes a facile route to pyranopyrone fused systems. Most of the compounds exhibit good antimicrobial