3-[(5-Chloro-2-methoxy-benzenesulfonyl)-propenyl-amino]-4-[(propenyl)oxy]-benzoic acid methyl ester → 4-(5-chloro-2-methoxy-benzenesulfonyl)-4H-benzo[1,4]oxazine-6-carboxylic acid methyl ester
反応式
[CH3:1][O:2][C:3](=[O:30])[C:4]1[CH:9]=[CH:8][C:7]([O:10]C=CC)=[C:6]([N:14]([S:18]([C:21]2[CH:26]=[C:25]([Cl:27])[CH:24]=[CH:23][C:22]=2[O:28][CH3:29])(=[O:20])=[O:19])[CH:15]=[CH:16]C)[CH:5]=1>C1(C)C=CC=CC=1>[CH3:1][O:2][C:3]([C:4]1[CH:9]=[CH:8][C:7]2[O:10][CH:16]=[CH:15][N:14]([S:18]([C:21]3[CH:26]=[C:25]([Cl:27])[CH:24]=[CH:23][C:22]=3[O:28][CH3:29])(=[O:20])=[O:19])[C:6]=2[CH:5]=1)=[O:30]参加物
3
実験手順
A solution of 3-[(5-chloro-2-methoxy-benzenesulfonyl)-propenyl-amino]-4-[(propenyl)oxy]-benzoic acid methyl ester (170 mg, 0.378 mmol) and dichloro(1,3-dimesityl-4,5-dihydroimidazol-2-ylidene)(phenylmethylene)(tricyclohexylphosphine)ruthenium (32 mg, 38 μmol) in toluene (1.7 mL) was stirred at 45° C. for 24 h, then the solvent was evaporated. Chromatography (SiO2, heptane-ethyl acetate gradient) afforded 4-(5-chloro-2-methoxy-benzenesulfonyl)-4H-benzo[1,4]oxazine-6-carboxylic acid methyl ester (75 mg, 50%). Light red solid, MS (ISP)=395.7 (M+H)+.