Improved conditions for the addition of alkoxides to di(ethylene glycol) di- p -tosylate: application to the stereospecific synthesis of the trans -isomers of dicyclohexano-18-crown-6
作者:Vincent J Huber、Mark L Dietz
DOI:10.1016/s0040-4039(01)00331-8
日期:2001.4
Conditions are defined for the efficient preparation of polyethers by direct condensation of ditosylates and alkoxides, and this approach is shown to provide a facile method for the synthesis of the trans-syn-trans (C) and trans-anti-trans (D) isomers of dicyclohexano-18-crown-6 (DCH18C6), one which both provides significantly improved yields and avoids the difficult separations required by certain
定义了通过二甲苯磺酸盐和醇盐的直接缩合有效制备聚醚的条件,并且表明该方法为合成反式-反式-顺式(C)和反式-反-反式(D)异构体提供了简便的方法二环己酮-18-冠-6(DCH18C6),其既提供了显着提高的产率又避免了某些先前描述的合成方法所需的困难分离。