tert-butyl 4-(5-(4-(butyloxycarbonylaminomethyl)piperidin-1-yl)-1-methyl-1H-pyrazol-4-ylcarbamoyl)-2-bromothiazol-5-ylcarbamate 、
(E)-(2-cyclohexylvinyl)boronic acid 以gave 257 as an off-white solid (17 mg, 20% over two steps)的产率得到(E)-5-amino-N-(5-(4-(aminomethyl)piperidin-1-yl)-1-methyl-1H-pyrazol-4-yl)-2-(2-cyclohexylvinyl)thiazole-4-carboxamide