Synthesis of enantiopure β2-homoalanine derivatives via rhodium catalyzed asymmetric hydrogenation
摘要:
The stereoselective synthesis of chiral beta(2)-homoalanine derivatives with 99% ee by the Rh-catalyzed enantioselective hydrogenation of prochiral 2-aminomethyl acrylates is described. The subsequent transformation to chiral 3-amino-2-methylpropanols is also demonstrated. (c) 2013 Elsevier Ltd. All rights reserved.
shown by the X-raycrystalstructures of the complexes 10b,c. Rhodium complexes 8 and 10 isolated or formed in situ with ligands4 and 5 were studied for catalytic hydrogenation of methyl 2-(acetamidomethyl)acrylate (11) and hydroboration of styrene (13) with catecholborane. In both reactions, the catalytic systems prepared either from the phospholyl(phosphinoborane)methane ligands4 or the corresponding
The stereoselective synthesis of chiral beta(2)-homoalanine derivatives with 99% ee by the Rh-catalyzed enantioselective hydrogenation of prochiral 2-aminomethyl acrylates is described. The subsequent transformation to chiral 3-amino-2-methylpropanols is also demonstrated. (c) 2013 Elsevier Ltd. All rights reserved.