The first asymmetric synthesis of (-)-isoiridomyrmecin and formal synthesis of (-)-loganin were done using chiral C2-symmetric building block dimethyl 3, 7-dihydroxy-cis-bicyclo[3.3.0]octa-2, 6-diene-2, 6-dicarboxylate (2) which was prepared by the lipase-catalyzed asymmetric demethoxy-carbonylation of tetramethyl 3, 7-dioxo-cis-bicyclo-[3.3.0]octane-2, 4, 6, 8-tetracarboxyrate (1).
(-)-异伊里多霉素的首次不对称合成和(-)-洛根素的首次全合成均使用手性C2对称结构单元3,7-二羟基-顺式-双环[3.3.0]
辛烷-2,6-二烯-2,6-二
羧酸二甲酯(2)进行,该结构单元由四甲基3,7-二氧代-顺式-双环-[3.3.0]
辛烷-2,4,6,8-四
羧酸(1)经
脂肪酶催化不对称脱甲氧基羰基化反应制备而成。