Regioselective functionalization of unprotected myo-inositol by electrophilic substitution
作者:Yutaka Watanabe、Tsuyoshi Uemura、Satoe Yamauchi、Kousei Tomita、Takafumi Saeki、Ryousuke Ishida、Minoru Hayashi
DOI:10.1016/j.tet.2013.03.109
日期:2013.6
Unprotected myo-inositol was treated with various electrophiles, such as aroyl chlorides, tosyl chloride and tert-butyldiphenylsilyl chloride in a solution of LiCl/DMA or DMSO to afford regioselectively l,3-di-O-substituted or racemic 1-O-substituted derivatives, depending on a quantity of reagents and reaction time. alpha-Unbranched alkanoic acid anhydrides in LiCl/DMA in the presence of triethylamine were suitable for acylation of myo-inositol, in contrast to the fact that acylation using alkanoyl chlorides in aprotic polar solvents generally does not proceed well due to decomposition of the reagents by the reaction with the solvents. (C) 2013 Elsevier Ltd. All rights reserved.