Reactions of β-methoxyvinyl trifluoromethyl ketones with 2-pyridinecarboxamidrazone: A convenient route to trifluoromethylated 4,5-dihydro-1H-1-picolinoylpyrazole hydrochlorides |
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收稿时间: | 15 January 2003 |
修稿时间: | 8 February 2003 |
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