A.C; A′.C′-doubly capped δ-cyclodextrin. Direct evidence for the capping structure
作者:Iwao Tabushi、Lung Chi Yuan、Kazuhiro Shimokawa、Kan-ichi Yokota、Tadashi Mizutani、Yasuhisa Kuroda
DOI:10.1016/s0040-4039(01)92908-9
日期:——
Doubly capped β-cyclodextrin was firstly prepared in good yield by the treatment of β- cyclodextrin with an excess amount (2.6/1 mol/mol) of benzophenone-3,3′-disulfonyl chloride. This successful double capping demonstrates that benzophenone-3,3′-disulfonyl capping takes place on A,C rings. The present double cap is a useful key intermediate for the preparation of regiospecifically tetrasubstituted
首先通过用过量(2.6 / 1 mol / mol)二苯甲酮-3,3'-二磺酰氯处理β-环糊精以高收率制备双封端的β-环糊精。这种成功的双重封端证明了在A,C环上发生了二苯甲酮-3,3'-二磺酰基封端。本发明的双帽是用于制备区域特异性四取代的环糊精的有用的关键中间体。