📜2,5-己二酮置于吡啶,Selenium(Iv) Oxide,一水合肼体系中,用 乙醇 作为反应溶剂,化学反应 36.0H,反应生成 3,6-哒嗪二甲酸 参考文献: Bis-Benzimidazole Compounds And Methods Of Using The Same[fr] Composés Bis-Benzimidazole Et Leurs Procédés D'Utilisation 标题: Bis-Benzimidazole Compounds And Methods Of Using The Same[fr] Composés Bis-Benzimidazole Et Leurs Procédés D'Utilisation
专利号:WO-0107415-A1 优先权日:1999-07-28 标 题 :Method of producing pyridazine-3,6-dicarboxylic acid esters 发明人:BESSARD YVES; CRETTAZ ROGER; BRIEDEN WALTER 权利人:LONZA AG; BESSARD YVES; CRETTAZ ROGER; BRIEDEN WALTER 摘要:The invention relates to a method of producing pyridazine-3,6-dicarboxylic acid esters of the general formula (I), wherein R represents C1-10 alkyl, C3-8 cycloalkyl or aryl-C1-4-alkyl, by reacting 3,6-dichloropyridazine with carbon monoxide and alcohols R-OH in the presence of palladium-phosphine complexes and bases. The invention also relates to novel pyridazine-3,6-dicarboxylic acid esters (I), wherein R represents C3-10 alkyl, C3-8 cycloalkyl or aryl-C<1-4>-alkyl. The pyridazine-3,6-dicarboxylic acid esters (I) are the potential intermediates for the synthesis of pharmaceutical active substances.