[C:1]([O:5][CH2:6][CH3:7])(=[O:4])[C:2]#[CH:3].[NH2:8]/[C:9](/[CH3:16])=[CH:10]\[C:11]([O:13][CH2:14][CH3:15])=[O:12]>>[CH2:6]([O:5][C:1](=[O:4])/[CH:2]=[CH:3]/[C:10](=[C:9](/[NH2:8])\[CH3:16])/[C:11]([O:13][CH2:14][CH3:15])=[O:12])[CH3:7]Ethyl propiolate (39.2 g, 41 mL, 400 mmol) was added to ethyl 3-aminocrotonate (51.75 g, 400 mmol) and the mixture heated at 90° C. for 90 minutes to give a dark red oil. The mixture was allowed to cool, to give the product as a dark orange solid, 87.0 g (96%).
読み込み中…