1,1-Dichloroethane → HCID 90409693、化合物

反応式

[C:1]([O:5][C:6]([N:8](C(OC(C)(C)C)=O)[C:9]1[C:14]([F:15])=[C:13]([C:16]2[CH:21]=[CH:20][C:19](Cl)=[C:18]([F:23])[CH:17]=2)[N:12]=[C:11]([C:24]([O:26][CH3:27])=[O:25])[C:10]=1[Cl:28])=[O:7])([CH3:4])([CH3:3])[CH3:2].FC(F)(F)C(O)=O.[Cl:43]C(Cl)C>>[C:1]([O:5][C:6]([NH:8][C:9]1[C:14]([F:15])=[C:13]([C:16]2([Cl:43])[CH:21]=[CH:20][CH:19]=[C:18]([F:23])[CH2:17]2)[N:12]=[C:11]([C:24]([O:26][CH3:27])=[O:25])[C:10]=1[Cl:28])=[O:7])([CH3:4])([CH3:3])[CH3:2]

参加物

反応物 3

HCID 63651,1-Dichloroethane

HCID 6422Trifluoroacetic acid

HCID 90409505HCID 90409505、化合物

生成物 1

HCID 90409693HCID 90409693、化合物収率 98%

実験手順

Methyl 4-(bis(tert-butoxycarbonyl)amino)-3-chloro-6-(4-chloro-3-fluorophenyl)-5-fluoropicolinate (2.1 g, 3.94 mmol) was dissolved in dichloroethane (20 mL) and trifluoroacetic acid (0.598 mL, 7.76 mmol) was added at rt. The reaction mixture was stirred overnight at room temperature then concentrated under vacuum. The product was purified by flash chromatography (SiO2, eluting with 2-20% ethyl acetate in dichloromethane) to provide the title compound as a white solid (1.64 g, 98%): 1H NMR (300 MHz, CDCl3) δ 7.80 (dd, J=22.0, 8.5 Hz, 2H), 7.50 (dd, J=8.3, 7.6 Hz, 1H), 6.51 (s, 1H), 4.02 (s, 3H), 1.56 (s, 9H); ESIMS m/z 431 ([M−H]−).