(1,4-dimethyl-1H-pyrazol-3-yl)boronic acid 、 tert-butyl (R)-2-((1-(3-cyano-2-(ethylthio)-6-methyl-4-oxo-4H-chromen-8-yl)ethyl)amino)benzoate 在
四(三苯基膦)钯 、
噻吩-2-甲酸亚铜(I) 、
caesium carbonate 作用下,
以
1,4-二氧六环 为溶剂,
以43 %的产率得到tert-butyl (R)-2-((1-(3-cyano-2-(1,4-dimethyl-1H-pyrazol-3-yl)-6-methyl-4-oxo-4H-chromen-8-yl)ethyl)amino)benzoate