Ring transformations of β-lactam-condensed 1,3-benzothiazines to isoquinoline and thiazole derivatives by sulfur extrusion and addition sequences
作者:Lajos Fodor、Péter Csomós、Antal Csámpai、Pál Sohár
DOI:10.1016/j.tet.2012.05.033
日期:2012.8
investigated. With 2 equiv of base, the dichloro-β-lactam derivatives underwent rearrangement and dihydro-1,4-benzothiazepines, 3,4-substituted isoquinolines and substituted thiazole disulfides were isolated. A possible reaction mechanism is proposed for the simultaneous formation of the novel products. The formation of isoquinoline and thiazole derivatives can be explained by sulfur extrusion and addition
研究了二氯-β-内酰胺稠合的2-芳基-1,3-苯并噻嗪与甲醇钠的环转化。用2当量的碱,对二氯-β-内酰胺衍生物进行重排,并分离出二氢-1,4-苯并硫氮杂,、 3,4-取代的异喹啉和取代的噻唑二硫化物。为同时形成新产物,提出了一种可能的反应机理。异喹啉和噻唑衍生物的形成可以通过硫的挤出和添加顺序来解释。