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)
COPOLYMER, AND LIQUID CRYSTAL ALIGNMENT LAYER INCLUDING CURED PRODUCT THEREOF
申请人:Schadt Martin
公开号:US20140221574A1
公开(公告)日:2014-08-07
Provided is a liquid crystal alignment layer of which a constituent member is a polymer represented by the general formula (I).
提供的是一种液晶取向层,其中成分之一是由通式(I)表示的聚合物。
Cleavage of the THP protecting group under Pd/C-catalyzed hydrogenation conditions
作者:Leena H Kaisalo、Tapio A Hase
DOI:10.1016/s0040-4039(01)01630-6
日期:2001.10
Alcohol and phenol THP or ethoxyethyl ether protecting groups may be cleaved in high yield under Pd/C-catalyzed hydrogenation conditions in EtOH, owing to the inadvertent presence of small quantities of HCl in the reaction mixture. MOM ethers are not cleaved under these conditions. (C) 2001 Elsevier Science Ltd. All rights reserved.