Asymmetric synthesis of 2-alkyl-3-thiazoline carboxylates: stereochemistry of the MnO2-mediated oxidation of cis- and trans-2-alkyl-thiazolidine-(4R)-carboxylates
作者:Xavier Fernandez、Elisabet Duñach
DOI:10.1016/s0957-4166(01)00219-1
日期:2001.6
The asymmetric synthesis of a series of 3-thiazoline carboxylates, 2, was effected by MnO2 oxidation of the corresponding cis/trans thiazolidines, 1. The stereochemistry of the oxidation reaction was studied using NMR and chiral GC analyses. Compounds 2 were obtained with enantiomeric excesses (e.e.s) in the range of 40–100%.
Therapeutic methods employing substituted piperidines which are CCR3 antagonists
申请人:GRUNDL Marc
公开号:US20130023517A1
公开(公告)日:2013-01-24
Object of the present invention are novel substituted compounds of the formula 1,
wherein A, R
1
, R
2
, R
3
and R
4
are defined as in the description. Another object of the present invention is to provide antagonists of CCR3, more particularly to provide pharmaceutical compositions comprising a pharmaceutically acceptable carrier and a therapeutically effective amount of at least one of the compounds of the present invention or a pharmaceutically acceptable salt thereof.