反应详情

As illustrated in the scheme above and following General Procedure 5, (2,4-dimethoxy-5-pyrimidinyl)boronic acid (0.939 g, 5.10 mmol), Pd2(dba)3 (0.064 g, 0.07 mmol), dry KF (0.890 g, 15.3 mmol), 5,7-dichloro-1,3-dihydro-1-methyl-2H-1,4-benzodiazepin-2-one (1.12 g, 4.61 mmol) and P(t-Bu)3 (0.42 mL of a 10% solution in hexanes, 0.21 mmol) were combined and heated for 20 h. After workup, purification of the crude product by silica gel column chromatography (1:3 hexanes:EtOAc) provided the title compound as a pale orange solid (1.20 g, 75%). 1H-NMR (CDCl3): δ 8.50 (s, 1H), 7.49 (dd, J=2.4 Hz, J=8.8 Hz, 1H), 7.29 (d, J=8.8 Hz, 1H), 7.13 (d, J=2.4 Hz, 1H), 4.84 (d, J=10.8 Hz, 1H), 4.06 (s, 3H), 3.79 (s, 3H), 3.76 (d, J=10.8 Hz, 1H), 3.42 (s, 3H). MS (ESI) (M+H)+=347.

1. temperatureheated for 20 h
2. customAfter workup, purification of the crude product by silica gel column chromatography (1:3 hexanes:EtOAc)