Preparation of optically active alkyl succinic acid monoalkyl esters comprising enantioselective hydrogenation of ester compound in presence of catalyst, which carries phospholane ligand

摘要

Preparation of optically active alkyl succinic acid monoalkyl esters (I) comprises enantioselective hydrogenation of ester compounds (II) in the presence of a catalyst, which carries a phospholane ligand (L). Preparation of optically active alkyl succinic acid monoalkyl esters of formula (I) comprises enantioselective hydrogenation of ester compound of formula (II) in the presence of a catalyst, which carries a phospholane ligand of formula (L). D, E : H or 1-10C alkyl; R : 1-10C alkyl, aryl or alkylaryl; R 2>1-6C alkyl, aryl or alkylaryl; R 1>H or R 2>; A : R 1>or heterocyclic compound of formula (b); and B1 : bridge member with 1-5C between two P-atom or Cp-Fe-Cp. [Image] [Image].