Asymmetric Hydrogenation of α-Primary and Secondary Amino Ketones: Efficient Asymmetric Syntheses of (−)-Arbutamine and (−)-Denopamine
作者:Gao Shang、Duan Liu、Scott E. Allen、Qin Yang、Xumu Zhang
DOI:10.1002/chem.200700594
日期:2007.9.17
Two beta-receptor agonists (-)-denopamine and (-)-arbutamine were prepared in good yields and enantioselectivities by asymmetrichydrogenation of unprotected aminoketones for the first time by using Rh catalysts bearing electron-donating phosphine ligands. A series of alpha-primary and secondaryaminoketones were synthesized and hydrogenated to produce various 1,2-amino alcohols in good yields and
A JAK inhibitor comprising, as an active ingredient, a nitrogen-containing heterocyclic compound represented by formula (I)
wherein W represents a nitrogen atom or -CH-;
X represents -C (=O) - or -CHR4- (wherein R4 represents a hydrogen atom, or the like);
R1 represents the formula described below [wherein Q1 represents-CR8-(wherein R8 represents a hydrogen atom, substituted or unsubstituted lower alkyl, or the like);
Q2 represents -NR15- (wherein R15 represents a hydrogen atom, substituted or unsubstituted lower alkyl, or the like); and R5 and R6 may be the same or different and each represents a hydrogen atom, halogen, carboxy, substituted or unsubstituted lower alkyl, or the like], or the like; and
R2 and R3 may be the same or different and each represents a hydrogen atom, halogen, substituted or unsubstituted lower alkyl, or the like} or a pharmaceutically acceptable salt thereof.
The present invention relates to a series of novel compounds which have been shown to possess antifungal activity. The invention therefore relates to the new compounds, methods for their preparation, pharmaceutical compositions comprising them and to the compounds for use as a medicament, more in particular antifungal medicament.
Synthesis of chiral oxazolidinone derivatives through lipase-catalyzed kinetic resolution
作者:Yan Zhang、Yang Zhang、Yansong Ren、Olof Ramström
DOI:10.1016/j.molcatb.2015.08.004
日期:2015.12
The synthesis of enantioenriched oxazolidinone derivatives through lipase-catalyzed kineticresolution is described. The synthesis comprised a two-step, cascade acylation in one pot, resulting in a range of oxazolidinone derivatives in good yields and excellent enantiopurities.