[EN] NOVEL PROTECTING REAGENTS, PROTECTING GROUPS AND METHODS OF FORMING AND USING THE SAME [FR] NOUVEAUX REACTIFS DE PROTECTION, GROUPES DE PROTECTION, ET METHODES DE FORMATION ET D'UTILISATION DESDITS REACTIFS ET GROUPES
The trimethylsilyl xylyl (TIX) ether: a useful protecting group for alcohols
作者:Ch. Raji Reddy、Amar G. Chittiboyina、Rajashaker Kache、Jae-Chul Jung、E. Blake Watkins、Mitchell A. Avery
DOI:10.1016/j.tet.2004.11.023
日期:2005.1
A new protectinggroup for alcohols, the p-trimethylsilyl xylyl (TIX) group has been developed. The TIX group is used to protect various alcohols under acidic as well as basic conditions. The protected ethers thus formed had noteworthy chemoselectivity upon deprotection in the presence of other benzyl ethers and commonly used protectinggroups. The stability of the TIX group towards various reagents
An Efficient and Highly Selective Deprotecting Method for β-(Trimethylsilyl)ethoxymethyl Ethers
作者:Ming-Yi Chen、Adam Shih-Yuan Lee
DOI:10.1021/jo0107204
日期:2002.2.1
A series of beta-(trimethylsilyl)ethoxymethyl ethers were hydrolyzed to their corresponding alcohols in high yields by using a catalytic amount of CBr4 (15%) in MeOH under refluxing reaction conditions. The chemoselective deprotection between trialkylsilyl and beta-(trimethylsilyl)ethoxymethyl-protected alcohols can be achieved by using an alcohol with steric hindrance such as iPrOH. The selectivity also can be achieved in the CBr4/MeOH reaction mixture under ultrasonic reaction conditions.o