128385-67-1Relevant articles and documents
A Key Intermediate for the Chiral Synthesis of Elemanoids. Synthesis of (+)-β-Elemenone
Kato, Michiharu,Vogler, Bernhard,Tooyama, Youichi,Yoshikoshi,Akira
, p. 151 - 154 (2007/10/02)
(1R,5S)-3-Phenylsulfenyl-6,6-dimethylbicycloheptanone obtained from (+)-nopinone was transformed into (1R,4S,5S)-4-methyl-4-vinylbicycloheptan-2-one, whose cyclobutane ring was cleaved with BF3*EtO2-Zn(OAc)2 in acetic anhydride to provide (4S,5S)-1-acetoxy-4-isopropenyl-5-methyl-5-vinyl-1-cyclohexene (5), the key intermediate, in a highly regio- and stereoselective manner.Regioselective introduction of a three-carbon unit to 5 with acetone followed by dehydration yielded (+)-β-elemenone.