Selective deprotection of TBDMS alkyl ethers in the presence of TIPS or TBDPS phenyl ethers by catalytic CuSO4·5H2O in methanol
作者:Davir González-Calderón、Luis J. Benítez-Puebla、Carlos A. González-González、Salomón Assad-Hernández、Aydeé Fuentes-Benítez、Erick Cuevas-Yáñez、David Corona-Becerril、Carlos González-Romero
DOI:10.1016/j.tetlet.2013.07.074
日期:2013.9
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.
Aluminium Chloride Hexahydrate (AlCl<sub>3</sub> · 6H<sub>2</sub>O): An Efficient, Facile, Mild, And Highly Chemoselective Catalytic Deprotection of Tert-Butyldimethylsilyl (TBS) Ethers
作者:Davir González-Calderón、Luis J. Benitez-Puebla、Carlos A. Gonzalez-Gonzalez、Marco A. Garcia-Eleno、Aydeé Fuentes-Benitez、Erick Cuevas-Yañez、David Corona-Becerril、Carlos González-Romero
DOI:10.1080/00397911.2013.851243
日期:2014.5.3
Abstract tert-Butyldimethylsilyl (TBS) phenyl / alkyl ethers were cleaved to the corresponding efficiently parent hydroxyl compounds in good yields usingcatalyticamounts of AlCl3 · 6H2O by conventional or microwave-assisted heating in methanol or isopropanol solution. Intramolecular and competitive experiments demonstrated the chemoselective deprotection of TBS ethers in the presence of triisopropylsilyl