89615-73-6Relevant academic research and scientific papers
Efficient kinetic resolution of amino acids catalyzed by lipase AS 'Amano' via cleavage of an amide bond
Wang, Bo,Liu, Yanfeng,Zhang, Dela,Feng, Yuhong,Li, Jiacheng
, p. 1338 - 1342,5 (2020/09/16)
Herein the efficient kinetic resolution of non-natural alpha-amino acids catalyzed by lipase AS 'Amano' via cleaving the amide bond is reported. The starting materials were the corresponding amino acid amides and the amino acids were generated with ees of up to 99% with E values of >600. These results indicated that the lipase AS 'Amano' could be a powerful amide hydrolase for the kinetic resolution of amino acid starting from the corresponding amino acid amides.
A comparison of the asymmetric hydrogenation catalyzed by rhodium complexes containing chiral ligands with a binaphthyl unit and those with a 5,5′,6,6′,7,7′,8,8′-octahydro-binaphthyl unit
Zhang, Fu-Yao,Kwok, Wai Him,Chan, Albert S.C.
, p. 2337 - 2342 (2007/10/03)
The chiral ligands H8-BINAPO and H8-BDPAB were synthesized by reacting chlorodiphenylphosphine with H8-BINOL and H8-BINAM, respectively. Applications of these ligands in the Rh-catalyzed enantioselective hydrogenation of a variety of (Z)-acetamido-3-arylacrylic acid methyl esters provided chiral amino acid derivatives with good to excellent enantioselectivities (H8-BINAPO: up to 84.0% e.e.; H8-BDPAB: up to 97.1% e.e.). In the hydrogenation of acetamidoacrylic acid, 99% e.e. was obtained when a [Rh(H8-BDPAB)]+ catalyst was used. The catalytic activities and enantioselectivities of [Rh(H8-BINAPO)]+ and [Rh(H8-BDPAB]+ are substantially better than those obtained with the corresponding rhodium catalysts containing BINAPO (up to 64% e.e.) and BDPAB (up to 92.6% e.e.).
