Kinetic resolution of chiral hydroperoxidesvia Sharpless Epoxidation
作者:E. H�ft、H.-J. Hamann、A. Kunath
DOI:10.1002/prac.19943360611
日期:——
The kinetic resolution of tertiary hydroperoxides via catalytic Sharpless epoxidation with various allylic alcohols has been investigated. By using 1-cyclohexyl-1-phenylethyl hydroperoxide an enantiomeric excess (e.e.) of up to 29 % of the resolved hydroperoxide has been observed at a consumption of the racemic hydroperoxide of nearly 50 %. The e.e. can be increased, however, only by raising the hydroperoxide consumption.
Kinetic Resolution of Hydroperoxides with Enantiopure Phosphines: Preparation of Enantioenriched Tertiary Hydroperoxides
作者:Tom G. Driver、Jason R. Harris、K. A. Woerpel
DOI:10.1021/ja070482f
日期:2007.4.1
kinetic resolution strategy capable of accessing opticallyactivetertiary hydroperoxides is reported. Readily accessible tertiary hydroperoxides are resolved with commercially available (R)- or (S)-xylyl-PHANEPHOS with selectivity factors as large as 37. The resulting bis(phosphineoxide) can be recycled in high yields. The isolated mono(phosphineoxide) intermediate resolved hydroperoxides with the