On the chemoselectivity and mechanism of desilylation of tert-butyldimethylsilyl ethers with TMSOTf
作者:Roger Hunter、Wolfgang Hinz、Philip Richards
DOI:10.1016/s0040-4039(99)00523-7
日期:1999.4
A modified literature procedure is presented for desilylating primary and secondary tert-butyldimethylsilyl ethers involving TMSOTf followed by breakdown of the bis-silyloxonium ion in methanol. The chemoselectivity of the process with respect to TBDPS, TIPS, MEM, ester, ketal, acetate, benzoate and NBoc functionalities has been evaluated, and a mechanism involving intermediacy of a transient tert-butyldimethylsilylium ion is proposed. (C) 1999 Elsevier Science Ltd. All rights reserved.