6-(substituted phenyl)-5-methyl-4,5-dihydro-pyridazin-3(2<i>H</i>)-ones of medicinal interest. The synthesis of SK&F 94836 and SK&F 95654
作者:B. E. Burpitt、L. P. Crawford、B. J. Davies、J. Mistry、M. B. Mitchell、K. D. Pancholi、W. J. Coates
DOI:10.1002/jhet.5570250615
日期:1988.11
Two synthetic routes to the dihydropyridazinone-cyanoguanidine 4 (SK&F 94836) are described, both proceeding via the anilino compound 6. An efficient synthesis of the dihydropyridazinone-pyridone 5 (SK&F 95654) is reported. This synthesis proceeds via the fluoro-keto-acid 24, with subsequent displacement of the fluoro substituent by 4-pyridone. The surprising effectiveness of water as a solvent in
描述了到二氢哒嗪酮-氰基胍4(SK&F 94836)的两种合成路线,两者均通过苯胺基化合物6进行。报道了二氢哒嗪酮-吡啶酮5(SK&F 95654)的有效合成。该合成经由氟-酮酸24进行,随后氟取代基被4-吡啶酮置换。在该反应中水作为溶剂的出人意料的有效性已被强调。