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71.
Marina Kopp Jean‐Charles Lancelot Patrick Dallemagne Sylvain Rault 《Journal of heterocyclic chemistry》2001,38(5):1045-1050
Synthesis of novel pyrazolopyrrolopyrazines is herein described with the aim to reach new specific PDE‐5 inhibitors of potential clinical interest in male erectile dysfunction. 相似文献
72.
Anna Caruso Jean-Charles Lancelot Maria Stefania Sinicropi Aurélien Lesnard 《Tetrahedron》2009,65(50):10400-176
A one-pot synthesis of 2-dialkylamino-5,11-dimethyl-6H-pyrimido[5,4-b]carbazol-4(3H)-ones, as new ellipticine analogs, starting from aminocarbazole derivatives is reported. This method allowed us to prepare a library of potentially useful compounds in the pharmaceutical field. 相似文献
73.
Nicolas Primas Alexandre Bouillon Jean-Charles Lancelot Hussein El-Kashef Sylvain Rault 《Tetrahedron》2009,65(29-30):5739-5746
A facile synthetic route to the new thiazol-5-ylboronic acid pinacol ester was described herein. Its reactivity toward Suzuki cross-coupling reaction was studied to provide various 5-arylthiazoles. A comparative study between Suzuki cross-coupling reactions and palladium-catalyzed C5–H direct arylation on thiazole ring was achieved. 相似文献
74.
2,3-dihydro[1,5] benzothiazepines and diazepines can be prepared by condensation of o-aminothiophenol or o-phenylenediamines with a variety of 3-chlorothieno-or benzothienopropanones. 相似文献
75.
JC Wolff S Monte N Haskins D Bell 《Rapid communications in mass spectrometry : RCM》1999,13(18):1797-1802
Structural analysis of minor components in mixtures is a vital requirement in the development of any pharmaceutical compound. Mass spectrometry is uniquely able to give this kind of information on the trace amounts of material present as minor impurities in a drug substance. In this study we show that a combination of mass spectrometric analysers with different characteristics is an even more powerful approach with a higher chance of establishing a potential structure. In particular the advent of analysers capable of accurate mass measurement on small amounts of material has enabled structures to be proposed in situations where previously no real conclusions could be made. Copyright 1999 John Wiley & Sons, Ltd. 相似文献
76.
77.
In this paper the exact solution of the non-symmetric matrixRiccati equation with analytic coefficients is approximatedby a rational matrix function with a prefixed accuracy. Thisrational matrix function is locally defined as the exact solutionof a Riccati problem with matrix polynomial coefficients obtainedby truncation of the Taylor expansions of the matrix coefficientsof the original problem. 相似文献
78.
J. C. Lancelot C. Saturnino H. El-Kashef D. Perrine C. Mahatsekake H. Prunier M. Robba 《Journal of heterocyclic chemistry》1996,33(2):427-430
Several new β-lactams have been synthesized in good yields, via the cyclization of 3-chloro-N-arylpropionamides in a mixture of N, N-dimethylformamide and anhydrous sodium carbonate under a nitrogen atmosphere. 相似文献
79.
G. Lancelot 《Molecular physics》2013,111(4):1099-1108
We compute the radiative phosphorescence lifetime of caffeine using CNDO/S wavefunctions. The importance of nπ*, πσ* and σπ* singlet and triplet states is considered. The calculated values are in good agreement with experimental determinations. The role played by two-electron terms is briefly discussed. 相似文献
80.
Nikul’shina M. S. Mozhaev A. V. Lancelot C. Blanchard P. Lamonier C. Nikul’shin P. A. 《Russian Journal of Applied Chemistry》2019,92(1):105-112
Russian Journal of Applied Chemistry - The effect of quinoline on the hydrodesulfurization and hydrogenation activities of bi- and trimetallic NiMo(W)/Al2O3 hydrotreating catalysts obtained using... 相似文献