Diastereoselective Reduction of Chiral N-Tosyl-2-benzoyl-1,3-oxazine Derived from (1R)-(+)-Camphor
作者:Kwang-Youn Ko、Hoseop Yun
DOI:10.3987/com-10-12016
日期:——
The stereochemistry of reduction of chiral N-tosyl-2-benzoyl-1,3-oxazine prepared by condensation of 1,3-amino alcohol derived from (1R)-(+)-camphor with phenylglyoxal was investigated using various reducing agents. Based on X-ray crystallography, 2-benzoyl group in 1,3-oxazine ring was situated in the axial position. High diastereoselectivity observed in the hydride reduction can be explained by a chelate model where N-tosyl oxygen atom takes part in chelation rather than ring oxygen atom.