2-溴吡啶 、 7-bromo-2-(but-3-ynyl)-5-fluorobenzo[d]oxazole 在
7-bromo-5-fluoro-2-(4-(pyridin-2-yl)but-3-ynyl)benzo[d]oxazole 、 crude residue 、
methanol-dichloromethane 作用下,
以to yield 130 mg (0.38 mmol, 45%) of 7-bromo-5-fluoro-2-(4-(pyridin-2-yl)but-3-ynyl)benzo[d]oxazole as a brown solid的产率得到7-bromo-5-fluoro-2-(4-(pyridin-2-yl)but-3-ynyl)benzo[d]oxazole