N,1-dihydroxy-3,3-dimethyl-1,3-dihydrobenzo[c][1,2]oxaborole-5-carbimidoyl chloride → HCID 71571899、化合物
反応式
[OH:1][N:2]=[C:3](Cl)[C:4]1[CH:15]=[CH:14][C:7]2[B:8]([OH:13])[O:9][C:10]([CH3:12])([CH3:11])[C:6]=2[CH:5]=1.[Cl:17][C:18]1[CH:23]=[C:22]([C:24]([C:26]([F:29])([F:28])[F:27])=[CH2:25])[CH:21]=[C:20]([Cl:30])[C:19]=1[O:31][CH3:32]>CN(C=O)C>[Cl:17][C:18]1[CH:23]=[C:22]([C:24]2([C:26]([F:29])([F:27])[F:28])[O:1][N:2]=[C:3]([C:4]3[CH:15]=[CH:14][C:7]4[B:8]([OH:13])[O:9][C:10]([CH3:12])([CH3:11])[C:6]=4[CH:5]=3)[CH2:25]2)[CH:21]=[C:20]([Cl:30])[C:19]=1[O:31][CH3:32]参加物
4
実験手順
To a solution of crude compound N,1-dihydroxy-3,3-dimethyl-1,3-dihydrobenzo[c][1,2]oxa-borole-5-carbimidoyl chloride (0.29 g, 1.23 mmol) and 1,3-dichloro-2-methoxy-5-(3,3,3-trifluoroprop-1-en-2-yl)benzene (0.4 g, 1.48 mmol) in DMF (10 mL) at rt was added TEA (0.51 mL, 3.67 mmol). The reaction mixture was stirred for 12 h, poured into ice-water and extracted with EA. The organic layer was washed with brine, dried over Na2SO4, filtered and concentrated under reduced pressure. The residue was purified by prep-TLC eluted with PE-EA (3:2) and then purified by preparative TLC to give the title compound (110 mg, yield 15.6%) as a white solid. 1H NMR (400 MHz, DMSO-d6): δ 9.27 (s, 1 H), 7.82-7.75 (m, 5 H), 4.46 (d, J=18.4 Hz, 1 H), 4.36 (d, J=18.4 Hz, 1 H), 3.93 (s, 3 H), 1.53 (s,6 H) ppm; MS: m/z=472 (M−1, ESI−).