A Simple and Efficient Synthetic Route to Chiral Isopavines. Synthesis of (−)-<i>O</i>-Methylthalisopavine and (−)-Amurensinine
作者:Luisa Carrillo、Dolores Badía、Esther Domínguez、José L. Vicario、Imanol Tellitu
DOI:10.1021/jo9708102
日期:1997.10.1
The isopavinan alkaloids (-)-O-methylthalisopavine (7a) and (-)-amurensinine (7d) have been synthesized in good yield and high ee from the appropriate 1,2-diarylethylamine derivatives using optically active beta-amino alcohols as chiral support. This synthetic route employs as key steps the alkylation reaction of the azomethine derivatives 2 with Grignard reagents 1 and a novel one-pot double-intramolecular cyclization of the adequately functionalized 1,2-diarylethylamines 5 to afford a series of optically active isopavines 6a-d and 7a-d.