作者:Dean S. Clyne、Larry Weiler
DOI:10.1016/s0040-4020(99)00846-7
日期:1999.11
involved either the Baeyer-Villiger ring expansion of a cyclic ketone or the macrolactonization of a hydroxy acid to give a lactone. The lactone carbonyl was removed either by conversion to an intermediate thionolactone obtained by reaction with Lawesson's reagent and reduction or by direct reduction using a boron trifluoride etherate mediated sodium borohydride reaction.
作为正在进行的大环化合物化学研究的一部分,合成了具有各种甲基取代模式的14元大环醚。这些大环醚的制备涉及环状酮的Baeyer-Villiger环膨胀或羟基酸的大内酯化以产生内酯。内酯羰基可通过转化成中间体的硫代内酯而除去,该中间体是通过与Lawesson试剂反应并还原而获得的,或者是通过使用三氟化硼醚化物介导的硼氢化钠反应直接还原而得到的。