A double Diels-Alder reaction of a C2-symmetric bis-dienophile: A new enantioselective approach to natural loganin
作者:Seiichi Takano、Ayako Kurotaki、Kunio Ogasawara
DOI:10.1016/s0040-4039(00)96440-2
日期:1987.1
Reaction of a chiral C2-symmetric bis-dienophile and cyclopentadiene gave a mixture (3:2) of adducts and of which the major one was converted into the key intermediate of loganin. The formation of the adducts is presumed via the anti-Felkin-Anh type active conformers, and , respectively.