New Chiral Synthesis of Methyl and Allyl Disubstituted Butyrolactone: A Formal Synthesis of (-)-Ngaione
作者:Kohei Inomata、Katsufumi Suzuki、Yasuyuki Endo
DOI:10.3987/com-03-9908
日期:——
A new chiral synthesis of butyrolactone [(-)-7] bearing methyl and allyl substituents at the γ-position has been established via diastereoselective continuous nucleophilic addition to the chiral tricyclic lactone [(-)-1] as the key step. In practice, continuous nucleophilic addition to the tricyclic lactone [(-)-1] by using the combination of methyllithium and allylmagnesium bromide proceeded to yield