Chemoselective trimethylsilylation and tetrahydropyranylation of benzylic and primary and secondary aliphatic alcohols proceed efficiently in the presence of 1,3-dibromo-5,5-dimethylhydantoin (DBH) under mild and completely heterogeneous reaction conditions in excellent yields.
Neue substituierte Pyridine können durch Reduktion von Pyridinen, die durch einen Ketonrest substituiert sind, und nachfolgender Verseifung, Cyclisierung oder Hydrierung hergestellt werden. Die neuen Verbindungen können als Wirkstoffe in Arzneimittel verwendet werden.
Tetrahydropyranylation of Alcohols over Modified Zeolites
作者:N. Narender、K. Suresh Kumar Reddy、M. Arun Kumar、C. N. Rohitha、S. J. Kulkarni
DOI:10.1007/s10562-009-0205-7
日期:2010.1
A catalytic amount of Mo beta enables tetrahydropyranylation of various alcohols, phenols and naphthols under mild reaction conditions at room temperature in moderate to excellent yields within short reaction times is presented. The catalyst Mo beta is reused without significant loss of activity. The product isolation is simple and environmentally benign.