共查询到20条相似文献,搜索用时 18 毫秒
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A. Yu. Dubovtsev A. A. Moroz M. V. Dmitriev A. N. Maslivets 《Russian Journal of Organic Chemistry》2016,52(4):546-552
Methyl 3-aroyl-1-aryl-4,5-dioxo-4,5-dihydro-1H-pyrrole-2-carboxylates reacted with arylhydrazines to give methyl 3-aroyl-1-aryl-2-(2-arylhydrazinyl)-4-hydroxy-5-oxo-2,5-dihydro-1H-pyrrole-2-carboxylates which underwent thermal recyclization into isomeric methyl 1-aryl-5-(arylcarbamoyl)-4-aroyl-1H-pyrazole- 3-carboxylates and methyl 1,5-diaryl-4-[2-oxo-2-(arylamino)acetyl]-1H-pyrazole-3-carboxylates. 相似文献
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The dependences of the reaction rate constant for bleaching of solutions of chlorophyll under the action of light with a wavelength of 434 and 670 on the type of solvent and additives (O2, H2O, HCl, and anthocyanins) have been studied. 相似文献
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T. S. Khlebnikova Yu. A. Piven’ A. V. Baranovskii F. A. Lakhvich 《Russian Journal of Organic Chemistry》2012,48(3):411-418
3-Polyfluoroalkyl-6,6-dimethyl-7-(1H-1,2,3-triazol-1-yl)-6,7-dihydro-1H-indazol-4(5H)-ones were synthesized with high regioselectivity by 1,3-dipolar cycloaddition of terminal alkynes (phenylacetylene, hex-
1-yne, hept-1-yne, and but-3-yn-1-ol) to 7-azido-6,6-dimethyl-3-polyfluoroalkyl-6,7-dihydro-1H-indazol-4(5H)-ones which were prepared by bromination of 6,6-dimethyl-3-polyfluoroalkyl-6,7-dihydro-1H-indazol- 4(5H)-ones with N-bromosuccinimide in anhydrous carbon tetrachloride, followed by treatment of the corresponding 7-bromo derivatives with sodium
azide. 相似文献
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O. V. Ershov A. V. Eremkin Ya. S. Kayukov A. N. Lyshchikov O. E. Nasakin V. A. Tafeenko 《Russian Journal of Organic Chemistry》2008,44(4):570-576
2-(4-Amino-2,5-dihydro-1H-imidazol-4-ylidene)malononitriles were synthesized by three-component reaction of tetracyanoethylene, carbonyl compound, and ammonium acetate. The synthesis can be performed in two steps with intermediate isolation of 2-aminoethene-1,1,2-tricarbonitrile, as well as using preliminarily prepard 2-aminoethene-1,1,2-tricarbonitrile and 1,3,5-trisubstituted 2,4-diazapentadienes. 相似文献
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