Enantiopure Derivatives of 1,1,2-Triphenylethane-1,2-diol by Unusual Ring Opening of Its Cyclic Sulfite
作者:Ralf Fleischer、Dietmar Galle、Manfred Braun
DOI:10.1002/jlac.199719970621
日期:1997.6
The reaction of triphenylglycol (S)-1 with thionyl chloride leads to the cyclicsulfites 2a and 2b in a ratio of 90:10. When the mixture of diastereomers 2a/b is treated with alcohols 3 or diols 6, enantiomerically pure ethers 5 and 7 are obtained by an unexpected SN1-type ring cleavage. Enantiopure triphenyloxirane (R)-10 arises under inversion of configuration upon treatment of 2a/b with sodium azide