The isomers and conformers of some push–pull enamines studied by vibrational and NMR spectroscopy and by ab initio calculations
摘要:
The isomers and conformers of six push-pull enamines: 3-dimethylamino-, 3-methylamino- and 3-amino-2-acetyl propenenitrile [(H3C)(2)N-CH=C(CN)(COCH3), H3C-NH-CH=C(CN)(COCH3) and H2N-CH=C(CN)(COCH3)] and 3-dimethylamino-, 3-methylamino- and 3-amino-2-methylsulfonyl propenenitrile [(H3C)(2)N-CH=C(CN)(SO2CH3), H3C-NH-CH=C(CN)(SO2CH3) and H2N-CH=C(CN)(SO2CH3)] have been studied experimentally by vibrational and NMR spectroscopy and theoretically by the ab initio calculations at MP2 level in 6-31G** basis set. The IR and Raman spectra of all compounds as a solid and solute in various solvents have been recorded in the region 4000-50 cm(-1). The NMR spectra were obtained in chloroform and DMSO at room temperature.All six compounds have been prepared by the same way. NMR spectra revealed that both dimethylamino compounds were prepared as a pure E isomers whereas in the case of methylamino compounds the 3-methylamino-2-methylsulfonyl propenenitrile was prepared also as a pure E isomer but 3-methylamino-2-acetyl propenenitrile as a pure Z isomer. Also 3-amino-2-methylsulfonyl propenenitrile was obtained as a pure the E isomer, but 3-amino-2-acetyl propenenitrile as a mixture of both E and Z isomers.Confomational possibilities of studied compounds are given only by the rotation of the acetyl and methylamino groups. Vibrational spectra revealed existence of two conformers with Z and E orientation of acetyl group for 3-dimethylamino-2-acetyl propenenitrile. Two conformers with anti or syn orientation of methylamino group for 3-methylamino-2-methylsulfonyl propenenitrile have been confirmed by vibrational and NMR spectra, but only one conformer with anti orientation of methylamino group for 3-methylamino-2-acetyl propenenitrile in chloroform solution and in solid phase was found. For latter compound the additional isomer/conformer was detected in more polar solvents (acetonitrile/DMSO). These experimental findings have been supported by ab initio solvent effect calculations. (c) 2005 Elsevier B.V. All rights reserved.
[EN] HETEROCYCLIC MODULATORS OF LIPID SYNTHESIS AND COMBINATIONS THEREOF<br/>[FR] MODULATEURS HÉTÉROCYCLIQUES DE LA SYNTHÈSE DES LIPIDES ET COMBINAISONS EN CONTENANT
申请人:3 V BIOSCIENCES INC
公开号:WO2015095767A1
公开(公告)日:2015-06-25
Heterocyclic modulators of lipid synthesis are provided as well as pharmaceutically acceptable salts thereof; pharmaceutical compositions comprising such compounds; and methods of treating conditions characterized by disregulation of a fatty acid synthase pathway by the administration of such compounds and combinations of such compounds and other therapeutic agents.
[EN] HETEROCYCLIC MODULATORS OF LIPID SYNTHESIS<br/>[FR] MODULATEURS HÉTÉROCYCLIQUES DE LA SYNTHÈSE DES LIPIDES
申请人:3 V BIOSCIENCES INC
公开号:WO2014008197A1
公开(公告)日:2014-01-09
Heterocyclic modulators of lipid synthesis are provided as well as pharmaceutically acceptable salts thereof; pharmaceutical compositions comprising such compounds; and methods of treating conditions characterized by disregulation of a fatty acid synthase pathway by the administration of such compounds.
2-Ethoxymethylene-3-oxobutanenitrile is a versatile trifunctional reagent that allows the introduction of a three-carbon moiety to amine-substrates. The reaction of the title compound with hydrazines has been studied leading to appropriate substituted pyrazoles 4–11. Reactions with other dinitrogen nucleophiles were studied giving access to a set of fused pyrimidines 13. All types of compounds displayed
Process for the preparation of substituted pyrimidine derivatives
申请人:Cesco-Cancian Sergio
公开号:US20100004450A1
公开(公告)日:2010-01-07
The present invention is directed to processes for the preparation of substituted pyrimidine derivatives, useful as intermediates in the synthesis of histamine H
4
receptor modulators, and to intermediates in H4 modulator synthesis.