Selective deprotection of TBDMS alkyl ethers in the presence of TIPS or TBDPS phenyl ethers by catalytic CuSO4·5H2O in methanol
摘要:
TBDMS alkyl ethers are efficiently cleaved to the corresponding hydroxyl compounds upon heating (conventional or microwave) in methanol solution containing 20 mol % CuSO4 center dot 5H(2)O. Intramolecular chemoselective experiments showed that TBDMS alkyl ethers are selectively cleaved in the presence of TIPS or TBDPS aryl ethers. Competition experiments also showed that TBDMS alkyl ethers were selectively cleaved in the presence of TBDPS alkyl ethers. (C) 2013 Elsevier Ltd. All rights reserved.
Cerium(IV) sulfate tetrahydrate: a catalytic and highly chemoselective deprotection of THP, MOM, and BOM ethers
作者:Davir González-Calderón、Carlos A. González-González、Aydeé Fuentes-Benítez、Erick Cuevas-Yáñez、David Corona-Becerril、Carlos González-Romero
DOI:10.1016/j.tetlet.2013.10.117
日期:2013.12
methoxymethyl (MOM), and benzyloxymethyl (BOM) phenyl/alkyl ethers were efficiently cleaved to the corresponding parent hydroxyl compounds in good yields usingcatalyticamounts of Ce(SO4)2·4H2O by microwave-assisted or conventional heating in methanol solution. Intramolecular and competitive experiments demonstrated the chemoselective deprotection of THP ethers in the presence of triisopropylsilyl (TIPS)