A novel and efficient method for the silylation of alcohols with methallylsilanes catalyzed by Sc(OTf)3
摘要:
Reaction of alcohols with methallylsilanes in the presence of a catalytic amount of Sc(OTf)(3) provides efficiently the corresponding alkyl silyl ethers. By using microencapsulated (MC) Sc(OTf)(3), which can be easily recovered and reused, yields of alkyl silyl ethers are improved and the work-up process after completion of the reaction is considerably simplified. (C) 2000 Elsevier Science Ltd. All rights reserved.
Improved protocols for the selective deprotection of trialkylsilyl ethers using fluorosilicic acid
作者:Anthony S. Pilcher、Philip DeShong
DOI:10.1021/jo00071a023
日期:1993.9
Improvements for the application of aqueous fluorosilicic acid to the selective cleavage of tert-butyldimethylsilyl ethers in the presence of triisopropylsilyl ethers are described. Deprotection conditions have been optimized for cleavage selectivity, tolerance by acid-labile compounds, and cleavage rate. Mechanistic features of the desilylation reaction are discussed.