Acetyl chloride → HCID 24801130, compound

Reaction equation

[NH2:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]2[C:16]3[O:15][C:14]([NH:17][C:18]4[CH:23]=[C:22]([O:24][CH3:25])[C:21]([O:26][CH3:27])=[C:20]([O:28][CH3:29])[CH:19]=4)=[N:13][C:12]=3[CH:11]=[CH:10][CH:9]=2)=[CH:4][CH:3]=1.C(N(CC)CC)C.[C:37](Cl)(=[O:39])[CH3:38]>ClCCl>[CH3:29][O:28][C:20]1[CH:19]=[C:18]([NH:17][C:14]2[O:15][C:16]3[C:8]([C:5]4[CH:6]=[CH:7][C:2]([NH:1][C:37](=[O:39])[CH3:38])=[CH:3][CH:4]=4)=[CH:9][CH:10]=[CH:11][C:12]=3[N:13]=2)[CH:23]=[C:22]([O:24][CH3:25])[C:21]=1[O:26][CH3:27]

Participants

Procedure

A mixture of 0.075 g (0.1927 mmol) [7-(4-amino-phenyl)-benzooxazol-2-yl]-(3,4,5-trimethoxy-phenyl)-amine (example 11), 0.027 ml triethylamine and 0.016 g (0.199 mmol) acetyl chloride in 4 ml dichloromethane is stirred for 1 h at room temperature. Then the reaction mixture is poured on water and extracted 3× with EtOAc. The combined organic layers are washed with water and saturated NaCl solution, dried over MgSO4, filtered and the filtrate is concentrated in vacuo. The residue is purified by chromatography (silicagel, EtOAc) to afford the title compound as orange crystals. Rt=2.16 min (Waters Symmetry C8, 2.1×50 mm, detection 210-250 nM, 5% to 100% CH3CN in H2O in 2 min+0.05% TFA, flow rate 1.0 ml/min); MS: 434 (M+1)+; m.p. 265-270° C.