METHOD FOR SYNTHESIZING OPTICALLY ACTIVE a-AMINO ACID USING CHIRAL METAL COMPLEX COMPRISING AXIALLY CHIRAL N-(2-ACYLARYL)-2-[5,7-DIHYDRO-6H-DIBENZO[c,e]AZEPIN-6-YL] ACETAMIDE COMPOUND AND AMINO ACID
申请人:HAMARI CHEMICALS, LTD.
公开号:US20160102045A1
公开(公告)日:2016-04-14
Objects of the present invention are to provide an industrially applicable method for producing an optically active α-amino acid in high yield and in a highly enantioselective manner, to provide a simple production method of an optically active α,α-disubstituted α-amino acid, and to provide an intermediate useful for the above production methods of an optically active α-amino acid and an optically active α,α-disubstituted α-amino acid.
The present invention provides a production method of an optically active α-amino acid or a salt thereof, the production method comprising introducing a substituent into the α carbon in the α-amino acid moiety of a metal complex represented by the following Formula (1):
by an alkylation reaction, an aldol reaction, the Michael reaction, or the Mannich reaction, and releasing an optically pure α-amino acid enantiomer or a salt thereof by acid decomposition of the metal complex.
Kinetics of the alkaline hydrolysis of several n-benzyloxycarbonyldipeptide methyl and ethyl esters
作者:D.A. Hoogwater、M. Peereboom
DOI:10.1016/s0040-4020(01)87839-x
日期:1990.1
The reaction rates of the alkalinehydrolysis of synthesized -protected dipeptide methyl and ethyl esters were studied systematically. From the kinetic data the energies of activation, the pre-exponential factors and the reference values at 40°C were calculated. The rate of hydrolysis shows to be strongly dependent on the C-terminal amino acid in the sequence Gly ⪢ Ala/Met/Phe ⪢ Leu ⪢ Val/Pro. Surprisingly
系统地研究了合成保护的二肽甲酯和乙酯的碱水解反应速率。从动力学数据计算出活化能,指数前因子和40°C时的参考值。水解速率显示出强烈依赖于序列Gly⪢Ala / Met / Phe⪢Leu⪢Val / Pro的C末端氨基酸。令人惊讶地,N-末端氨基酸也发挥作用,但是顺序不同。N端苯丙氨酸尤其显示出相对加速作用。值得注意的是,与相应的甲酯/甲醇/水相比,乙醇/水中的含甘氨酸的二肽乙酯的酯水解明显更快。
A simple method for synthesis of amides and peptides through acyl chlorides
By improvement of the classical SOCl2-pyridine method for the preparation of acid chlorides, amides and opticallypurepeptides were synthesized rapidly in a simple manner from DCHA dicyclohexylammonium) salts of carboxylic acids. This modified SOCl2-pyridine method was applied to a rapid synthesis of TRH.
AXIAL-ASYMMETRIC N-(2-ACYLARYL)-2-[5, 7-DIHYDRO-6H-DIBENZO [C, E] AZEPINE-6-YL] ACETAMIDE COMPOUND AND CHIRALITY CONVERSION METHOD FOR A-AMINO ACID USING SAME