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- W2066684219 abstract "Different ferrocenyl-substituted hydrazones of heteroaryl/arylhydrazines (1a–e, 3 and 10) were reacted with dimethyl fumarate and gave two epimeric pairs of pyrazolidines (t,c-2a and t,c-2c), pyrazolines (5a,c, 6, 11), pyrazoles (8, 12) and condensed triazoles (4a, 7). On treatment with dicyanodichloroquinone (DDQ) the pyrido[2,3-d]pyridazinyl-substituted hydrazones (1b,e) were cyclized to condensed triazoles 4b,e. The reactivity of 1a–e in the cycloaddition process and oxidation level of the products were found to be highly dependent on the temperature and on the heteroaryl/aryl group. The significant difference was explained by theoretical calculations. The structures of products were determined by IR, 1D and 2D NMR methods (including HMQC, HMBC and DNOE) and single crystal X-ray analysis." @default.
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- W2066684219 date "2001-07-01" @default.
- W2066684219 modified "2023-09-27" @default.
- W2066684219 title "Study on ferrocenes, part 9 substrate selective transformations of some ferrocenylhydrazones" @default.
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- W2066684219 doi "https://doi.org/10.1016/s0022-2860(01)00429-x" @default.
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