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E. A. Lashmanova V. S. Larina A. K. Shiryaev 《Russian Journal of Organic Chemistry》2017,53(8):1249-1252
Alkylation products were obtained from ethyl 2-(hydroxyimino)-7-methyl-3-oxo-5-aryl-2,3- dihydro-5H-[1,3]thiazolo[3,2-a]pyrimidin-6-carboxylates at the treatment with alkyl halides, dimethyl sulfate, and diazomethane. Diazomethane alkylated the initial substrate at the oxygen atom of the carbonyl group of the thiazolidine fragment, the other reagents, at the oxygen atom of the hydroxyimino group. 相似文献
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Shiryaev A. K. Lashmanova E. A. Trofimova A. V. 《Russian Journal of Organic Chemistry》2019,55(3):335-338
Russian Journal of Organic Chemistry - Ethyl 4-methyl-6-phenyl-2-[2-(propan-2-ylidene)hydrazinyl]-1,6-dihydropyrimidine-5-carboxylate has been synthesized from ethyl... 相似文献
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Lashmanova Eugenia A. Agarkov Artem S. Rybakov Victor B. Shiryaev Andrey K. 《Chemistry of Heterocyclic Compounds》2019,55(12):1217-1221
Chemistry of Heterocyclic Compounds - Triazolo[4,3-a]pyrimidines were prepared by the reduction of 5,6,7-trisubstituted 2-(arylhydrazinylidene)-5H-[1,3]thiazolo[3,2-a]- pyrimidin-3(2H)-ones with... 相似文献
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Eugenia A. Lashmanova Anastasiya I. Kirdyashkina Pavel A. Slepukhin Andrey K. Shiryaev 《Tetrahedron letters》2018,59(12):1099-1103
2,2′-Dimers with a central double bond were prepared by the oxidation of 5,6-disubstituted 7-methyl-5H-[1,3]thiazolo[3,2-a]pyrimidin-3(2H)-ones with DMSO and Lawesson’s reagent at room temperature. The role of DMSO as an oxidizing reagent was confirmed by NMR spectroscopy. The E-configuration of the central CC bond for the two diastereomers of compound 8m was proven by single crystal X-ray data. The dimeric thiazolopyrimidines were orange or red colored and absorption bands at 283–330 and 459–476?nm were observed in the UV spectra. 相似文献
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