Regio- and enantioselective catalytic epoxidation of conjugated polyenes. Formal synthesis of LTA4 methyl ester
作者:Sukbok Chang、Nam Ho Lee、Eric N. Jacobsen
DOI:10.1021/jo00077a001
日期:1993.12
The (salen)Mn(III)-catalyzed asymmetric epoxidation reaction exhibits regioselectivity for attack at cis double bonds of conjugated dienes to afford enantiomerically enriched trans-vinyl epoxides as the major products.
Synthesis of the anti-influenza agent (−)-oseltamivir free base and (−)-methyl 3-epi-shikimate
作者:Varun Rawat、Soumen Dey、Arumugam Sudalai
DOI:10.1039/c2ob25635e
日期:——
A new enantioselective synthesis of the anti-influenza agent (−)-oseltamivir free base (7.1% overall yield; 98% ee) and (−)-methyl 3-epi-shikimate (16% overall yield; 98% ee) has been described from readily available raw materials. Sharpless asymmetric epoxidation and diastereoselective Barbier allylation of an aldehyde are the key reactions employed in the incorporation of chirality, while the cyclohexene