反应详情

温度

180 °C

A solution of 2-(4-(6-bromo-2-(4-(dimethylamino)phenyl)-3H-imidazo[4,5-b]pyridin-7-yl)piperazin-1-yl)-N-(thiazol-2-yl)acetamide (75 mg, 0.14 mmol) in degassed DMF (1 mL) containing Pd2 dba3 (0.05 eq, 0.0069 mmol, 6 mg), dppf (0.1 eq, 0.014 mmol, 8 mg) and Zn(CN)2 (1.5 eq, 0.21 mmol, 24 mg) was stirred with microwave heating at 180° C. for 30 minutes. After this time, further Pd2(dba)3 (6 mg), dppf (8 mg) and Zn(CN)2 (24 mg) were added and the mixture stirred under the same conditions for a further 30 minutes. hplc then showed partial conversion to the desired compound. Concentration in vacuo and purification of a small sample by semi-preparative hplc gave the pure product as a colourless solid; 1H-NMR (500 MHz, DMSO-d6) 2.80 (t, br, J=4.7 Hz, 4H, piperazine N(CH2)2), 3.00 (s, 6H, N(CH3)2), 3.42 (s, 2H, NCH2CO), 4.11 (s, br, 4H, piperazine N(CH2)2), 6.82 (d, J=9.0 Hz, 2H, N,N-dimethylaminophenyl), 7.24 (d, J=3.5 Hz, 1H, thiazole H-4 or H-5), 7.50 (d, J=3.5 Hz, 1H, thiazole H-4 or H-5), 7.99 (d, J=9.0 Hz, 2H, N,N-dimethylaminophenyl), 8.23 (s, 1H, imidazo[4,5-b]pyridine H-5), 11.91 (br s, 1H, CONH), 13.46 (br s, 1H, imidazo[4,5-b]pyridine NH);

1. stirringthe mixture stirred under the same conditions for a further 30 minutes