Ring opening of epoxides with NaHSO4: isolation of β-hydroxy sulfate esters and an effective synthesis for trans-diols
摘要:
Sodium hydrogen sulfate (NaHSO4) was observed to be highly effective as a reagent or catalyst in the ring-opening reactions of epoxides under mild conditions. Reaction of epoxides with NaHSO4 gave isolable P-hydroxy sulfate esters and vicinal diols. Experimenting with different epoxides, the study investigated the scope of the ring-opening reaction. (C) 2008 Elsevier Ltd. All rights reserved.
Highly enantio- and diastereo-selective synthesis of C2-symmetric 3,5-cyclohexadiene-1,2-diol and D2-symmetric cyclohexane-1,2,4,5-tetrol
作者:Hiroshi Suemune、Atsushi Hasegawa、Kiyoshi Sakai
DOI:10.1016/0957-4166(94)00350-k
日期:1995.1
Highly enantio- and diastereo-selective synthesis of C-2-symmetric 3,5-cyclohexadiene-1,2-diol 5 and D-2-symmetric cyclohexane-1,2,4,5-tetrol related compounds 7a,b, 10, 11 has been achieved using optically active 4-cyclohexene-1,2-diol (S,S)-1c prepared by an enzymatic procedure.