Synthesis and Chemistry of 4,5-Dihydrothieno[3,2-<i>b</i>]pyrrol-6-one—A Heteroindoxyl
作者:Alexander P. Gaywood、Hamish McNab
DOI:10.1021/jo900496u
日期:2009.6.5
by nitrous acid, and provides an N-methylene Meldrum’s acid derivative on treatment with methoxymethylene Meldrum’s acid. Reactions of 4,5-dihydrothieno[3,2-b]pyrrol-6-one with diazonium salts, with isatin, and with dimethyl acetylenedicarboxylate take place at the methylene position to provide a hydrazone, an indirubin analogue, and a succinate derivative, respectively. Oxidation of 4,5-dihydrothieno[3
2-乙酰基-3-叠氮基噻吩的快速真空热解(FVP)在炉温为350°C时产生3-甲基噻吩并[3,2- c ]异恶唑为主要产物,而在高于550°C的温度下产生了新的杂吲哚基4,仅形成5-二氢噻吩并[3,2- b ]吡咯-6-。杂吲哚基主要作为酮互变异构体存在。据O-由TFA质子化,N-乙酰化由乙酸酐,Ñ -nitrosated由亚硝酸,并提供了一个Ñ与甲氧基亚甲基Meldrum酸处理亚甲基Meldrum酸衍生物。4,5-二氢噻吩并[3,2- b]的反应具有重氮盐,靛红和乙炔二羧酸二甲酯的] pyrrol-6-one在亚甲基位置发生,分别提供,靛玉红类似物和琥珀酸酯衍生物。4,5-二氢噻吩并[3,2- b ]吡咯-6-的氧化产生异靛青素,相对于靛蓝素本身,其在紫外光谱中显示出变色现象。