A mild and efficient approach for the regioselective silyl-mediated protection–deprotection of C-4 hydroxyl group on carbohydrates
作者:Andrea Graziani、Pietro Passacantilli、Giovanni Piancatelli、Simona Tani
DOI:10.1016/s0040-4039(01)00611-6
日期:2001.6
This protocol shows high efficiency on intermediates, such as 1a, which contain a TIPS protective group at C-6 and necessarily a benzoyl group at C-4. Treatment of 1a with TBAF cleaves the TIPS protecting group and gives rise to an intramolecularmigration of the benzoyl group at C-4 to the less crowded C-6 position.