A Novel 1,3 O .fwdarw. C Silyl Shift and Deacylation Reaction Mediated by Tetra-n-butylammonium Fluoride in an Aromatic System
摘要:
A novel 1,3 O --> C migration of a silyl group accompanied by a deacylation reaction was discovered during the conversion of 2-acetyl-3,17-bis(tert-butyldimethylsilyl)-beta-estradiol (4) and 3,17-bis(tert-butyldimethylsilyl)-2-propionyl-beta-estradiol (5) to 2,17-bis(tert-butyldimethylsilyl)-beta-estradiol (6) in the presence of tetra-n-butylammonium fluoride. A crossover experiment indicated that the transformation is intramolecular.
A Novel 1,3 O .fwdarw. C Silyl Shift and Deacylation Reaction Mediated by Tetra-n-butylammonium Fluoride in an Aromatic System
摘要:
A novel 1,3 O --> C migration of a silyl group accompanied by a deacylation reaction was discovered during the conversion of 2-acetyl-3,17-bis(tert-butyldimethylsilyl)-beta-estradiol (4) and 3,17-bis(tert-butyldimethylsilyl)-2-propionyl-beta-estradiol (5) to 2,17-bis(tert-butyldimethylsilyl)-beta-estradiol (6) in the presence of tetra-n-butylammonium fluoride. A crossover experiment indicated that the transformation is intramolecular.