102735-53-5Relevant articles and documents
Phosphinoferrocenylaminophosphines as novel and practical ligands for asymmetric catalysis
Boaz, Neil W.,Debenham, Sheryl D.,Mackenzie, Elaine B.,Large, Shannon E.
, p. 2421 - 2424 (2002)
(Matrix Presented) A new series of ligands with a novel phosphine-aminophosphine ligation design as depicted in structure 1 has been prepared on a ferrocenylethyl backbone. These BoPhoz ligands of structure 2 have afforded exceedingly high activity and enantioselectivity in the rhodium-catalyzed asymmetric hydrogenation of dehydro-α-amino acid derivatives, itaconic acids, and α-ketoesters. These air-stable ligands are readily prepared from cost-effective and non-pyrophoric intermediates.
METHOD OF PRODUCING OPTICALLY ACTIVE AMINO ACID DERIVATIVE
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Page/Page column 13-14, (2011/04/18)
The present application relates to a method for producing an optically active α-amino acid derivative, comprising steps of reacting an α-haloester derivative represented by the general formula (1): of which alcohol part of the ester group is an optically active alcohol derivative, with an amine compound; then deprotecting the obtained compound; further carrying out an ester exchange reaction. According to the present invention method, it is possible to easily produce an optically active α-amino acid ester derivative which is useful as an intermediate for drugs with high selectivity.
The preparation of enantiomerically pure cyclopropylalanine
Boaz, Neil W.,Debenham, Sheryl D.,Large, Shannon E.,Moore, Mary K.
, p. 3575 - 3580 (2007/10/03)
Single enantiomer cyclopropylalanine (>99.9% ee) and various derivatives were prepared using an asymmetric hydrogenation approach with a rhodium catalyst based on the methyl BoPhoz ligand. N-Boc cyclopropylalanine benzyl ester was the preferred derivative
Kinetic Resolution of Unnatural and Rarely Occuring Amino Acids: Enantioselective Hydrolysis of N-Acyl Amino Acids Catalyzed by Acylase I
Chenault, H. Keith,Dahmer, Juergen,Whitesides, George M.
, p. 6354 - 6364 (2007/10/02)
Acylase I (aminoacylase; N-acylamino-acid amidohydrolase, EC 3.5.1.14, from porcine kidney and the fungus Aspergillus) is broadly applicable enzymatic catalyst for the kinetic resolution of unnatural and rarely occuring α-amino acids.Its enantioselectivity for the hydrolysis of N-acyl L-α-amino acids is nearly absolute, yet it accepts substrates having a wide range of structure and functionality.This paper reports the initial rates of enzyme-catalyzed hydrolysis of over 50 N-acyl amino acids and analogues, the stabilities of the enzymes in aqueous and aqueous/organic solutions, and the effects of different acyl groups and metal ions on the rates of enzymatic hydrolysis.Eleven α-amino and α-methyl α-amino acids were resolved on a 2-29-g scale.Crude L- and D-amino acid products had generally >90percent ee.The utility of resolved amino acids as chiral synthons was illustrated by the preparation of (R)- and (S)-1-butene oxide and the diastereoselective (cis:trans, 7-8:1) iodolactonization of three 2-amino-4-alkenoic acid derivatives.
CYCLOPROPYLALANINE, AN ANTIFUNGAL AMINO ACID OF THE MUSHROOM AMANITA VIRGINEOIDES BAS
Ohta, Tomihisa,Nakajima, Shigeru,Sato, Zenji,Aoki, Toshio,Hatanaka, Shin-ichi,Nozoe, Shigeo
, p. 511 - 512 (2007/10/02)
Cyclopropylalanine, an antifungal amino acid, has been isolated from the mushroom Amanita virgineoides Bas.Its structure has been elucidated as (2s)-2-amino-3-cyclopropylpropionic acid, on the basis of the spectroscopic analysis and its synthesis from L-allylglycine.