First stereoselective synthesis of (4aS,5R)-4,4a,5,6,7,8-hexahydro-4a,5-dimethyl-2(3H)-naphthalenone
作者:Xavier Cuesta、Asensio González、Josep Bonjoch
DOI:10.1016/s0957-4166(99)00349-3
日期:1999.8
The synthesis of enantiomerically pure (4aS,5R)-hexahydro-4a,5-dimethyl-2(3H)-naphthalenone (-)-1 is described for the first time. The synthesis starts from (R)-3-methylcyclohexanone and involves the preparation of piers enol lactone 6 in its enantiopure form as the key intermediate. Treatment of (+)-6 with methyl lithium followed by an intramolecular aldol reaction gives the bicyclic enone (-)-1. (C) 1999 Elsevier Science Ltd. All rights reserved.
Optical rotatory dispersion studies. 138. Synthesis and conformational analysis of .beta.-heteroatom-substituted cyclohexanones
作者:Lee Ann Gorthey、Mariappandar Vairamani、Carl Djerassi