Reaction of 1-Germatranol Hydrate with Carboxylic Acids

摘要

Reaction of 1-germatranol hydrate with carboxylic acids RCOOH (R = ClCH2, PhCH=CH, Ph, 2-FC6H4, 3-BrC6H4, 3-HOC6H4, 3-EtOC6H4) in protic (CH3OH, iso-C5H11OH) and aprotic polar solvent (CH3CN) is studied. 1-Acyloxygermatranes RC(O)OGe(OCH2CH2)(3)N are formed in yields from 11 to similar to 100 % depending on the nature of the acid, solvent, duration of the process and the method of its completion. The reaction is the most effective in acetonitrile. Its topochemical completion (heating of the reaction residue in a vacuum) increases the yield of 1-acyloxygermatranes.