3,4-Dichlorobenzeneboronic acid → 4-(3,4-Dichloro-phenyl)-2-(5,6-dimethoxy-benzoimidazol-1-yl)-thiazole-5-carboxylic acid
Reaction equation
C[O:2][C:3]([C:5]1[S:9][C:8]([N:10]2[C:14]3[CH:15]=[C:16]([O:21][CH3:22])[C:17]([O:19][CH3:20])=[CH:18][C:13]=3[N:12]=[CH:11]2)=[N:7][C:6]=1Br)=[O:4].[Cl:24][C:25]1[CH:26]=[C:27](B(O)O)[CH:28]=[CH:29][C:30]=1[Cl:31]>>[Cl:24][C:25]1[CH:26]=[C:27]([C:6]2[N:7]=[C:8]([N:10]3[C:14]4[CH:15]=[C:16]([O:21][CH3:22])[C:17]([O:19][CH3:20])=[CH:18][C:13]=4[N:12]=[CH:11]3)[S:9][C:5]=2[C:3]([OH:2])=[O:4])[CH:28]=[CH:29][C:30]=1[Cl:31]Participants
3
Procedure
In a similar manner as described for Example 26, 4-bromo-2-(5,6-dimethoxy-benzoimidazol-1-yl)-thiazole-5-carboxylic acid methyl ester (40 mg, 0.1 mmol) and 3,4-dichlorophenylboronic acid (28.6 mg, 0.15 mmol) gave 4-(3,4-Dichloro-phenyl)-2-(5,6-dimethoxy-benzoimidazol-1-yl)-thiazole-5-carboxylic acid (15.9 mg, 35%) as a white solid. 1H NMR (400 MHz, DMSO-d6) δ ppm 13.81 (br.s., 1 H); 8.85 (s, 1 H); 8.25 (d, 1 H); 7.97 (dd, 1 H); 7.81 (s, 1 H); 7.79 (d, 1 H); 7.39 (s, 1 H); 3.85 (s, 3 H); 3.87 (s, 3 H). MS m/z 450 (M+1).
Sources & evidence
- ORD record
- ord-e714197cb214499fa47edb8ecbbac83d
- Source dataset
- uspto-grants-2009_03
- Patent number
- US07504513B2
Reaction notes
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