An efficient one-pot synthesis of thiophene-fused pyrido[3,2-a]azulenes via Gewald reaction
作者:Dao-Lin Wang、Jian-Ying Wu、Qing-Tao Cui
DOI:10.1016/j.cclet.2014.07.007
日期:2014.12
A simple and efficient procedure was developed for the synthesis of 11H(2H)-4-oxothiophene[3′,4′:6,5]pyrido[3,2-a]azulene-10-carboxylates (3) in moderate to good yields via the Gewald reaction of ethyl 1-cyanoacetyl-2-methoxyazulene-3-carboxylate (1) with carbonyl compounds (2) and elemental sulfur utilizing imidazole as catalyst. This reaction provides a new procedure for synthesis of pyridinone-fused
开发了一种简单有效的方法,可适度合成11 H(2 H)-4-氧代噻吩[3',4':6,5]吡啶基[3,2-a] azulene-10-羧酸盐(3)通过使用咪唑作为催化剂的1-氰基乙酰基-2-甲氧基azulene-3-羧酸乙酯(1)与羰基化合物(2)和元素硫的Gewald反应,可得到良好的收率。该反应提供了合成吡啶酮-融合的天青石的新方法。