作者:Cédric Spitz、Vincent Reboul、Patrick Metzner
DOI:10.1016/j.tetlet.2011.07.148
日期:2011.11
Two efficient syntheses of 1,4-benzothiazepines, substituted in the positions 2 and 5, have been achieved either by a ring expansion reaction of cyclic sulfenamides with methylpropiolate or tosylacetylene catalyzed by pyridine, via a postulated allenolate intermediate; or by an α-sulfenylation reaction promoted by diethylamine and a subsequent acid catalyzed condensation reaction.
通过假定的烯丙酸酯中间体,通过环亚磺酰胺与丙炔酸甲酯或吡啶催化的甲苯磺酰基乙炔的环扩环反应,已经实现了在位置2和5上取代的1,4-苯并硫氮杂卓的两种有效合成。或通过由二乙胺促进的α-亚磺酰基化反应和随后的酸催化的缩合反应。