pyridazine derivatives哒嗪衍生物
Ethyl Pyridazine乙基哒嗪
Pyridazine monohydrochloride盐酸哒嗪
tetrahydro pyridazine四氢哒嗪
Pyridazine N-oxide哒嗪氮氧化物
Compound sulfachlor pyridazine sodium复方磺胺氯哒嗪钠
Bromo-pyridazine hydrobromide溴哒嗪氢溴酸盐
Pyridine Pyridazine Pyrimidine Pyrazine吡啶
4-Ethyl Pyridazine乙基哒嗪
3-ethyl pyridazine乙基哒嗪
In order to get a convenient method for preparation of pyridazinone carboxylate, 1-aryl-1,4-dihydro-4-oxo-6-methyl pyridazine-3-carboxylic acids have been converted to alkyl esters in good yieds by heating them with dialkyl phosphite at 120～130 ℃ for 4 h.
为探索哒嗪酮羧酸酯的简便合成方法，通过亚磷酸二烷基酯与1-芳基-1,4-二氢-4-氧-6-甲基哒嗪-3-羧酸（摩尔比为2∶1）在120～130 ℃下共热4 h，得到7个收率63%～85%的哒嗪酸烷基酯。
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