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W2003142394 abstract "An efficient total synthesis of (R) and (S)-3-methyl 5-pentyl 2,6-dimethyl-4-(3-nitrophenyl)-1,4-dihydropyridine-3,5-dicarboxylate in high optical purities is reported. The useful step is the resolution of racemic 2, 6-dimethyl-5-methoxycarbonyl-4-(3-nitrophenyl)-1,4-dihydropyridine-3-carboxylic acid by using commercially available Cinchona alkaloids cinchonidine and quinidine as the resolving agents. Under the optimum conditions, the optical purities for R- and S-enantiomers are extremely high (ee >99.5%). The further dihydropyridine receptor binding activity assay shows that the S-enantiomer is more potent than R-enantiomer both in rat cardiac (approximately 19 times) and cerebral cortex membrane (12 times)." @default.
W2003142394 created "2016-06-24" @default.
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W2003142394 date "2010-02-01" @default.
W2003142394 modified "2023-10-14" @default.
W2003142394 title "Synthesis and biological activity of the calcium modulator (R) and (S)-3-methyl 5-pentyl 2,6-dimethyl-4-(3-nitrophenyl)-1,4-dihydropyridine-3,5-dicarboxylate" @default.
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W2003142394 doi "https://doi.org/10.1016/j.bmcl.2009.12.104" @default.
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