An Alkyne Hydrosilylation-Oxidation Strategy for the Selective Installation of Oxygen Functionality
作者:Barry M. Trost、Zachary T. Ball、Kai M. Laemmerhold
DOI:10.1021/ja051578h
日期:2005.7.1
Alkynes bearing propargylic, homopropargylic, and bishomopropargylic hydroxyl groups are shown to serve as precursors for ketone or alpha-hydroxy ketone functionality. The approach hinges on the intermediacy of vinylsilanes created through regioselective hydrosilylation catalyzed by the complex [Cp*Ru(MeCN)3]PF6. Several oxidative pathways of linear and cyclic vinylsilanes are studied, and the possibility
NbCl5 mediated deprotection of methoxy methyl ether
作者:J.S. Yadav、B. Ganganna、Dinesh C. Bhunia、P. Srihari
DOI:10.1016/j.tetlet.2009.03.171
日期:2009.7
An efficient cleavage of methoxy methyl ether using NbCl5 is described. This protocol works efficiently with MOM ethers of alkyl, allyl, propargyl, benzyl alcohol and phenol derivatives. MOM esters are also found to be effectively cleaved under the present conditions.