Cleavage of tert-butyldimethylsilyl ethers by chloride ion
作者:Jaume Farràs、Carme Serra、Jaume Vilarrasa
DOI:10.1016/s0040-4039(97)10479-8
日期:1998.1
A general method for the selective cleavage of tert-butyldimethylsilylethers in the presence of tert-butyldiphenylsilyl ones has been established using a combination of H2O and a concentrated solution of LiCl in DMF at 90 °C. Since no acids, bases, reducing or oxidizing agents are used, the method seems to be very appropiate for the deprotection of TBDMS ethers in the presence of other sensitive functional
Iron-catalyzed aerobic oxidation of silyl ethers to carboxylic acids
作者:Zuizhi Lin、Shengming Ma
DOI:10.1039/d4cc01234h
日期:——
Direct aerobic oxidation of silylethers to carboxylic acids has been developed. The mild reaction conditions lead to a broad range of functional group compatibility. Different types of silyl groups have been investigated and selective deprotective oxidation has been realized. The reaction could be conducted under air.
Chemoselective one-pot cleavage and oxidation of silyl ethers to corresponding carbonyl compounds using IBX and acid catalysts
作者:Shogo Kamo、Kazuki Hori、Kazuyuki Sugita
DOI:10.1039/d4ob00858h
日期:——
chemoselective one-pot cleavage and oxidation of silyl ethersusing catalytic amount of TsOH·H2O and IBX in DMSO. The oxidation of primary alkyl TBS ethers afforded the corresponding aldehydes in 51–94% yields, in the presence of aryl TBS, MOM, and PMB ethers, as well as N-Boc and acetonide groups. Secondary benzyl TBS ethers bearing aryl TBS ethers were also oxidized to ketones in moderate yields. A
Efficient chemoselective deprotection of silyl ethers using catalytic 1-chloroethyl chloroformate in methanol
作者:Chang-Eun Yeom、Young Jong Kim、So Young Lee、Yong Je Shin、B. Moon Kim
DOI:10.1016/j.tet.2005.10.043
日期:2005.12
Fast and chemoselective desilylation of silyl-protected alcohols was achieved using a catalytic amount of 1-chloroethyl chloroformate in methanol. With a minimal amount of 1-chloroethyl chloroformate as the source for anhydrous HCl, extremely efficient cleavage of silyl ethers of primary and secondary alcohols was accomplished, and chemoselective deprotection of one silyl ether in the presence of another silyl or other acid-labile group was possible through controlling the amount of the chloroformate and reaction time. (c) 2005 Elsevier Ltd. All rights reserved.
A one-step and chemoselective conversion of silyl-protected alcohols into the corresponding acetates
作者:Takeshi Oriyama、Mihoko Oda、Junko Gono、Gen Koga
DOI:10.1016/s0040-4039(00)73040-1
日期:1994.3
A reagent system of acetyl bromide combined with a catalytic amount of tin(II) bromide cleaves readily trialkylsilyl ethers to give the corresponding acetates in high yields under very mild conditions.