A Mild, Palladium-Catalyzed Method for the Dehydrohalogenation of Alkyl Bromides: Synthetic and Mechanistic Studies
作者:Alex C. Bissember、Anna Levina、Gregory C. Fu
DOI:10.1021/ja306323x
日期:2012.8.29
accomplish palladium-catalyzed dehydrohalogenations of alkyl bromides to form terminal olefins. We have applied this method, which proceeds in excellent yield at room temperature in the presence of a variety of functional groups, to a formal total synthesis of (R)-mevalonolactone. Our mechanistic studies have established that the rate-determining step can vary with the structure of the alkyl bromide and
作者:Nicholas C. Ray、P.C. Raveendranath、Thomas A. Spencer
DOI:10.1016/s0040-4020(01)88311-3
日期:——
An enantioselective synthesis of (R)-mevalonolactone (1) has been accomplished starting from known epoxide 2, prepared with ⪢95% ee by asymmetric epoxidation of nerol. Functional group manipulation of 2 and ozonolysis afforded intermediate 8, which was converted to 11 via phenylselenoxide formation, followed by appropriate oxidations and deprotection, to afford 1.