oxygen functionalities is principally possible by modification of the basic concept. Methods for the oxidative generation of terpenoid exo-methylene lactone and furan units are exemplified by synthesis of menthofuran and the -menthenolides from isopulegols.
FRIEDRICH, DIRK;BOHLMANN, FERDINAND, TETRAHEDRON, 44,(1988) N 5, 1369-1392
作者:FRIEDRICH, DIRK、BOHLMANN, FERDINAND
DOI:——
日期:——
Lipase-catalyzed resolution of p-menthan-3-ols monoterpenes: preparation of the enantiomer-enriched forms of menthol, isopulegol, trans- and cis-piperitol, and cis-isopiperitenol
A study on the enzymic resolution of the most common p-menthan-3-ol monoterpene isomers is described. Enantio-enriched alcohols 1, 5, 10, 11 and 12 are obtained by means of the lipase-mediated kinetic acetylation of the corresponding racemic materials. The stereochemical aspects of the enzymic process have been investigated. We found that the structural features of the starting p-menthan-3-ol as well as the kind of lipase used, impacted strongly on the enantioselectivity of the resolution. The potentialities of this approach for preparative purposes are discussed. (C) 2003 Elsevier Ltd. All rights reserved.