Thiophene systems.<b>4</b>. Selective syntheses of thieno[3,4-<i>b</i>][1,4]- and [1,5]benzodiazepinones
作者:Jeffery B. Press、Corris M. Hofmann、Sidney R. Safir
DOI:10.1002/jhet.5570170701
日期:1980.11
Novel syntheses of thiophene fused tricyclic systems 1 and 2 are reported. The methods use intermediates 4-ethoxy-3-thiopheneamine, 4-ethoxy-3-thiophenecarbonyl aside and 4-ethoxy-3-thiophenecarbonyl chloride to effect selective, high yield syntheses of the target compounds in two steps. These methods allow preparation of thiophene systems without substitution at the normally reactive C-1 and C-3 positions
报道了噻吩稠合的三环系统1和2的新颖合成。该方法使用中间体4-乙氧基-3-噻吩胺,4-乙氧基-3-噻吩羰基酰胺和4-乙氧基-3-噻吩羰基氯,以两个步骤选择性,高产率地合成目标化合物。这些方法可以制备噻吩系统,而无需在通常具有反应性的C-1和C-3位置进行取代。