Stereoselective Synthesis of (<i>R</i>)- and (<i>S</i>)-4-Methoxydalbergione via Asymmetric Catalytic Hydrogenation
作者:Philippe Bissel、Abdesslame Nazih、Rafaël Sablong、Jean-Pierre Lepoittevin
DOI:10.1021/ol990961m
日期:1999.10.1
[GRAPHICS](R)-(+)- and (S)-(-)-4-methoxydalbergione were synthesized in seven steps with an enantiomeric excess of up to 95% using an asymmetric catalytic hydrogenation step with [Rh((S,S)-bdpp)(NBD)]ClO4 or [Rh((R,R)-bdpp)(NBD)]ClO4, respectively, at a hydrogen pressure of 80 bar. This method should give an easy access to the other members of the dalbergione family.