Benzoic acid, 4-amino-, 1,1-dimethylethyl ester → HCID 68379697、化合物

反応式

[CH3:1][C:2]1([CH3:17])[C:6]([CH3:8])([CH3:7])[O:5][B:4]([C:9]2[CH:10]=[C:11]([CH:14]=[CH:15][CH:16]=2)[CH:12]=O)[O:3]1.[NH2:18][C:19]1[CH:31]=[CH:30][C:22]([C:23]([O:25][C:26]([CH3:29])([CH3:28])[CH3:27])=[O:24])=[CH:21][CH:20]=1>CC(O)=O.C(Cl)Cl>[CH3:1][C:2]1([CH3:17])[C:6]([CH3:8])([CH3:7])[O:5][B:4]([C:9]2[CH:10]=[C:11]([CH:14]=[CH:15][CH:16]=2)[CH2:12][NH:18][C:19]2[CH:31]=[CH:30][C:22]([C:23]([O:25][C:26]([CH3:27])([CH3:28])[CH3:29])=[O:24])=[CH:21][CH:20]=2)[O:3]1

参加物

実験手順

A mixture of 3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzaldehyde (100 mg, 0.43 mmol), tert-butyl 4-aminobenzoate (83 mg, 0.43 mmol), NaHB(OAc)3 (273 g, 1.29 mmol) and AcOH (2 drops) in 30 mL of DCM was stirred at room temperature overnight. The mixture was washed with sat NaHCO3 (30 mL), water (2×30 mL), and brine (30 mL) dried over Na2SO4 concentrated under reduce pressure to give a crude tert-butyl 4-(3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzylamino)benzoate (130 mg) as a black oil. LC-MS: 410 [M+H]+, tR=1.92 min.