(S)-2-[2-(2-chloro-phenoxy)-3-propoxycarbonyl-allylamino]-4,4-difluoro-pentanoic acid methyl ester → HCID 66894484、化合物
反応式
[CH3:1][O:2][C:3](=[O:28])[C@@H:4]([NH:10][CH2:11][C:12]([O:20][C:21]1[CH:26]=[CH:25][CH:24]=[CH:23][C:22]=1[Cl:27])=[CH:13][C:14](OCCC)=[O:15])[CH2:5][C:6]([F:9])([F:8])[CH3:7]>C(#N)C.ClCCl>[CH3:1][O:2][C:3](=[O:28])[C@@H:4]([N:10]1[CH2:11][C:12]([O:20][C:21]2[CH:26]=[CH:25][CH:24]=[CH:23][C:22]=2[Cl:27])=[CH:13][C:14]1=[O:15])[CH2:5][C:6]([F:9])([F:8])[CH3:7]参加物
4
反応条件
- 温度
- 140 °C
実験手順
A solution of (S)-2-[2-(2-chloro-phenoxy)-3-propoxycarbonyl-allylamino]-4,4-difluoro-pentanoic acid methyl ester (255 mg, 0.63 mmol) in acetonitrile (2 mL) was placed in a sealed microwave reaction tube and heated in a microwave reactor at 140° C. for 3.5 h. The mixture was diluted with dichloromethane and concentrated in vacuo with silica gel (2 g). Purification by Biotage flash chromatography (Aspire 40 g column, 16% ethyl acetate/hexanes to 50% ethyl acetate/hexanes) afforded (S)-2-[4-(2-chloro-phenoxy)-2-oxo-2,5-dihydro-pyrrol-1-yl]-4,4-difluoro-pentanoic acid methyl ester (100 mg, 32% over two steps) as a colorless gum: HR-ES-MS m/z calculated for C16H16NO4ClF2 [M+Na]+ 382.0628, observed 382.0629.