Oxalyl chloride → 2-(4-Tert-butylphenyl)-6-nitro-3,1-benzoxazin-4-one

반응식

[C:1]([C:5]1[CH:25]=[CH:24][C:8]([C:9]([NH:11][C:12]2[CH:20]=[CH:19][C:18]([N+:21]([O-:23])=[O:22])=[CH:17][C:13]=2[C:14]([OH:16])=[O:15])=O)=[CH:7][CH:6]=1)([CH3:4])([CH3:3])[CH3:2].C(Cl)(=O)C(Cl)=O>C(Cl)Cl.CN(C)C=O>[N+:21]([C:18]1[CH:19]=[CH:20][C:12]2[N:11]=[C:9]([C:8]3[CH:24]=[CH:25][C:5]([C:1]([CH3:2])([CH3:4])[CH3:3])=[CH:6][CH:7]=3)[O:16][C:14](=[O:15])[C:13]=2[CH:17]=1)([O-:23])=[O:22]

참가 물질

실험 절차

To a suspension of 2-(4-tert-butylbenzoylamino)-5-nitrobenzoic acid (37.1g, 108 mmol) and N,N-dimethylformamide (0.4 mL, 5.4 mmol) in methylene chloride (200 mL) was added oxalyl chloride (10.4 mL, 119 mmol) in a dropwise manner. After stirring for 2 h, the mixture was filtered and the small amount of black solid was discarded. The filtrate was concentrated in vacuo to give 32.9 g (94%) of the title compound as a light brown solid; mp 159-61° C.