Tetrahedron Letters p. 3991 - 3992 (1987)
Update date:2022-09-26
Topics:
Takano, Seiichi
Kurotaki, Ayako
Ogasawara, Kunio
Reaction of a chiral C2-symmetric bis-dienophile 1 and cyclopentadiene gave a mixture (3:2) of adducts 2 and 3 of which the major one was converted into a key intermediate 12 of loganin.The formation of the adducts is presumed via the anti-Felkin-Anh type active conformers, 14 and 15, respectively.
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