作者:A. Ravi Kumar、G. Bhaskar、A. Madhan、B. Venkateswara Rao
DOI:10.1081/scc-120022181
日期:2003.1.8
A novel, stereo selective synthesis of (-)-cytoxazone la and stereo-selective synthesis of (+)-5-epi-cytoxazone 1b were achieved via stereoselective Grignard addition of vinylmagnesium bromide on N-Boc aldehyde obtained from p-hydroxy-D-phenylglycine 2 followed by cyclization of N-Boc alcohol 6, ozonolysis and reduction to get (+)-5-epi-cytoxazone. Compound 6 underwent mitsunobu conditions, deprotection of ester followed by cyclization of N-Boc alcohol to get (-)-cytoxazone.