(R)-Amination mediated by (R)-specific ω-transaminases generally requires costly d-alanine in excess to obtain the desired chiralamines in high yield. Herein, a one-pot, trienzymatic cascade comprising an (R)-specific ω-transaminase, an amine dehydrogenase, and a formate dehydrogenase was developed for the economical and eco-friendly synthesis of (R)-chiral amines. Using inexpensive ammonium formate as the
Enzymatic Racemization of Amines Catalyzed by Enantiocomplementary ω-Transaminases
作者:Dominik Koszelewski、Barbara Grischek、Silvia M. Glueck、Wolfgang Kroutil、Kurt Faber
DOI:10.1002/chem.201001602
日期:2011.1.3
A strategy for the biocatalytic racemization of primary α‐chiral amines was developed by employing a pair of stereocomplementary PLP‐dependent ω‐transaminases. The interconversion of amine enantiomers proceeded through reversible transamination by a prochiral ketone intermediate, either catalyzed by a pair of stereocomplementary ω‐transaminases or by a single enzyme possessing low stereoselectivity
A class of pyrazole derivatives is described for use in treating p38 kinase medicated disorders. Compounds of particular interest are defined by Formula IA
wherein R
1
, R
2
, R
3
and R
4
are as described in the specification.
CHEMICAL DERIVATIVES AND THEIR APPLICATION AS ANTITELOMERASE AGENTS
申请人:MAILLIET Patrick
公开号:US20090226411A1
公开(公告)日:2009-09-10
The present invention relates to cancer therapy and to novel anticancer agents having a mechanism of action which is quite specific. It also relates to novel chemical compounds as well as their therapeutic application in humans.
It is intended to provide antipruritics (drugs to control itching, antiitch agents and drugs to stop itching). It is found out that a compound having an agonistic activity to the cannabinoid receptor shows an antipruritics effect.