Reactions of selenium dichloride and dibromide with divinyl sulfone: synthesis of novel four- and five-membered selenium heterocycles
作者:Vladimir A. Potapov、Evgeny O. Kurkutov、Maxim V. Musalov、Svetlana V. Amosova
DOI:10.1016/j.tetlet.2010.07.133
日期:2010.10
The reactions of selenium dichloride and dibromide with divinyl sulfone leading to novel selenium heterocycles, 2,4-bis(halomethyl)-1,3-thiaselenetane-1,1-diones and 5-halo-2-halomethyl-1,3-thiaselenolane-1,1-diones, have been studied. Under the action of silica gel or pyridine, 5-halo-2-halomethyl-1,3-thiaselenolane-1,1-diones undergo facile regioselective dehydrohalogenation into 5-halo-2-methylene-1
二氯化硒和二溴化物与二乙烯基砜的反应生成新的硒杂环,2,4-双(卤代甲基)-1,3-硫代硒烷-1,1-二酮和5-卤代-2-卤代甲基-1,3-硫杂环戊烷-1,1-二酮已被研究。在硅胶或吡啶的作用下,5-卤代-2-卤代甲基-1,3-噻吩并戊烯-1,1-二酮容易地区域选择性脱卤化氢成5-卤代-2-亚甲基-1,3-噻吩并戊烷-1,1 -diones。