Enantioselective synthesis of both the enantiomeric forms of the hydrindane derivatives mentioned in the title, potential chiral precursors in terpenoid synthesis, starting from R-carvone employing two different cyclopentannulation methodologies is described.
Chiral synthons from carvone. Part 50.† Enantiospecific approaches to both enantiomers of bicyclo[4.3.0]nonane-3,8-dione derivatives
作者:A. Srikrishna、T. Jagadeeswar Reddy
DOI:10.1039/b104253j
日期:——
isopropenyl group followed by cyclopropane cleavage and cuprate addition generated the dione (−)-12a. Whereas, a Wacker mediated cyclopentannulation of (R)-carvone via the dione 15 furnished the enone 17. Functional group manipulation including the degradation of isopropenyl group transformed the enone 17 into the dione (+)-12a, which on regioselective ketalisation generated the ketoketal (+)-2.