Catalyzed by a rhodium complex of P-stereogenic diphosphine ligand trichickenfootphos (TCFP), asymmetric hydrogenation of racemic aldimines via dynamic kineticresolution has been realized for the preparation of chiral arylglycines with good yields and enantioselectivities.
We developed a catalytic aerobic method to synthesize α,α-disubstituted α-amino acids through cross-dehydrogenativecoupling of azlactones. Combining an iron catalyst with a bisoxazolidine ligand resulted in high catalytic performance, and cross-coupling with an indole proceeded smoothly underaerobicconditions. A wide variety of α-aryl and aliphatic amino acid derived azlactones were applied to the
Discovery of new chemical leads of inhibitors for TNF-alpha production starting from the chemical modification of I is reported. Further biological studies of 1 to disclose the site of its action strongly suggested that 1 inhibits LPS-induced TNF-alpha expression in the liver and spleen of mice. Structure-activity relationships (SARs) are also discussed and full details including the chemistry are reported. (C) 2002 Elsevier Science Ltd. All rights reserved.
Discovery of IHMT-MST1-58 as a Novel, Potent, and Selective MST1 Inhibitor for the Treatment of Type 1/2 Diabetes