4-[3-Dimethylamino-1-(2-dimethylaminovinyl]prop-2-enylidene]-2-phenyl-1,3-oxazol-5(4H)-one and 5-[3-Dimethylamino-1-(2-dimethylaminovinyl)prop-2-enylidene]-3-methyl-2-thioxo-1,3-thiazolidin-4-one in the Synthesis of 1,4-Dihydropyridine Derivatives
作者:Branko Stanovnik、Ales Hvala、Lucija Jukic Sorsak、Gorazd Sorsak、Urska Bratusek、Jurij Svete、Nina Lah、Ivan Leban
DOI:10.3987/com-02-9433
日期:——
afforded 1,4-dihydropyridine derivatives (5) and (16) in 19-94% yields. Reactions of oxazolones (5) with hydrazine hydrate gave the corresponding imidazolones (6), while upon base- or acid-catalysed methanolysis of 5 methyl (benzoylamino)(1-substituted pyridin-4(1H)-ylidene)acetates (7) were obtained. Catalytic hydrogenation of 7a furnished α-(piperidin-4-yl)glycine derivative (8) and/or α-(pyridin-2-yl)glycine
4-3-二甲氨基-1-[2-(二甲氨基)乙烯基]丙-2-亚乙烯基]-2-苯基-1,3-恶唑-5(4H)-一(3)和5-3-二甲氨基-1-[2-(二甲基氨基)乙烯基]prop-2-enylidene]-3-methyl-2-thioxo-1,3-thiazolidin-4-one (15) 由 4-(1-methylethyleneidene) 制备-2-phenyl-1,3-oxazol-5(4H)-one (2) 和 5-(1-methylethyleneidene)-2-thioxo-1,3-thiazolidin-4-one (11)。用伯胺处理化合物(3)和(15)得到19-94%产率的1,4-二氢吡啶衍生物(5)和(16)。恶唑酮 (5) 与水合肼反应得到相应的咪唑酮 (6),而在碱或酸催化的 5 甲基 (苯甲酰氨基)(1-取代的吡啶-4(1H)-亚甲基)乙酸酯 (7) 的甲醇分解下,获得。7a