Several kinds of water-soluble dihydropyridine vasodilators were prepared and their vasodilating activities were evaluated. Among them, 2-(N-benzyl-N-methylamino)-ethyl methyl 2, 6-dimethyl-4-(m-nitrophenyl)-1, 4-dihydropyridine-3, 5-dicarboxylate hydrochloride (YC-93) was found to have outstanding activity and bioavailability. Various synthetic routes for this compound were examined.
[EN] Novel compounds of Formula (I) or pharmaceutically acceptable salts, prodrugs and biologically active metabolites thereof of Formula (I), wherein the substituents are as defined herein, which are useful as therapeutic agents. [FR] Cette invention concerne de nouveaux composés représentés par la formule (I) ou des sels pharmaceutiquement acceptables, des promédicaments et des métabolites biologiquement actifs de ces composés représentés par la formule (I) dans laquelle les substituants sont tels que définis dans la description, lesquels composés sont utilisés comme agents thérapeutiques.
Resolution of nitrogen-centered chiral tetraalkylammonium salts: application to [1,2] Stevens rearrangements with N-to-C chirality transmission
作者:Eiji Tayama、Seijun Otoyama、Hiroyuki Tanaka
DOI:10.1016/j.tetasy.2009.10.025
日期:2009.11
The resolution of N-chiral, amino acid-derived quaternary ammonium salts is demonstrated by using chiral BINOL as a complexing agent. Determination of the enantiopurities and absolute configurations of the resolved N-chiral tetraalkylammonium salts are described. The [1,2] Stevensrearrangement of N-chiral ammonium salts is shown to proceed with N-to-C chirality transmission to afford optically active