Hydrolysis of various nitrile compounds to the amides by catalysis of 2-mercaptoethanol in a phosphate buffer
作者:Young Bok Lee、Yang Mo Goo、Youn Young Lee、Jae Keun Lee
DOI:10.1016/s0040-4039(00)70718-0
日期:——
α-Aminonitriles, 4-nitrobenzonitrile and 3,5-dinitrobenzonitrile were hydrolyzed exclusively to amides efficiently when they were stirred with 2-mercaptoethanol in a phosphate buffer (pH 7.0), 50 mM).
A Viedma ripening route to an enantiopure building block for Levetiracetam and Brivaracetam
作者:Iaroslav Baglai、Michel Leeman、Richard M. Kellogg、Willem L. Noorduin
DOI:10.1039/c8ob02660b
日期:——
A simple route to enantiomerically pure (S)-2-aminobutyramide – the chiral component of the anti-epileptic drugs Levetiracetam and Brivaracetam has been developed. This approach is based on the rational design and application of a Viedma ripening process. The practical potential of the process is demonstrated on a large scale.
METHOD OF SEPARATELY COLLECTING OPTICALLY ACTIVE AMINO ACID AMIDE AND OPTICALLY ACTIVE AMINO ACID
申请人:MITSUBISHI GAS CHEMICAL COMPANY, INC.
公开号:EP1741698A1
公开(公告)日:2007-01-10
The present invention is a method for separately collecting an optically active amino acid amide and an optically active amino acid from an aqueous solution containing the optically active amino acid amide and the optically active amino acid together with at least one member selected from the group consisting of an acid, a base and a salt: comprising a neutralization step of neutralizing an acid or a base when the aqueous solution contains the acid or the base; a desalting step of removing a salt contained in the aqueous solution and/or formed in the neutralization step; and a step of collecting the optically active amino acid amide and the optically active amino acid separately from the aqueous solution which has been desalted in the desalting step, by a process which takes advantage of a difference in solubility between the two components in an organic solvent. The desalting step is preferably performed by an electrodialysis process optionally in the state where ammonia is added to the aqueous solution. According to the present invention, an optically active amino acid amide and an optically active amino acid, which are important as intermediates in the production of pharmaceuticals, agricultural chemicals, and various industrial chemicals, can be separately collected with high efficiency by use of an organic solvent.