Biocatalytic enantioselective approach to 3-aryl-2-nitropropanols: Synthesis of enantioenriched (R)-5-methoxy-3-aminochroman, a key precursor to the antidepressant drug Robalzotan
作者:Claudio Fuganti、Alessandro Sacchetti
DOI:10.1016/j.molcatb.2010.06.003
日期:2010.10
results of our studies on the biocatalytic enantioselective synthesis of different 3-aryl-2-nitropropanols are presented. These compounds could be obtained in moderate to good ee both by baker'syeast mediated reduction of (E)-2-nitro-3-arylprop-2-en-1-ol precursors and by lipase kineticresolution of racemic 3-aryl-2-nitropropanols. The synthesis of enantioenriched (R)-5-methoxy-3-aminochroman is also
Organocatalytic desymmetrization of cyclic meso-anhydrides through enantioselective alcoholysis with functionalized primary nitroallylic alcohols
作者:Yan ming Chen、Mamatha Amireddy、Kwunmin Chen
DOI:10.1016/j.tet.2014.10.008
日期:2014.11
The direct organocatalytic desymmetrization of cyclic meso-anhydrides was achieved by alcoholysis with nitroallylic alcohols. The reaction between primary nitroallylic alcohols and cyclic meso-anhydrides catalyzed by cinchonidine derived thiourea organocatalyst II (10 mol %) proceeded smoothly. The corresponding hemiesters were obtained in high chemical yields with high to excellent levels of stereoselectivity