Stereoselective synthesis of (-)-cytoxazone and (+)-5-epi-cytoxazone
2003
Abstract A novel, stereo selective synthesis of (−)-cytoxazone 1a and stereoselective synthesis of (+)-5-epi-cytoxazone 1b were achieved via stereoselective Grignard addition of vinylmagnesium bromide on N-Boc al ehyde 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. #IICT Communication Number: 020616.
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