(E)-4-(5-bromo-2-(2-(quinolin-2-yl)vinyl)imidazo[1,2-a]pyrazin-8-yl)morpholine 、
4-(N-[2-(叔丁基二甲基硅氧烷)乙基]磺酰胺基)苯硼酸 以to obtain compound 33a的产率得到(E)-N-(2-((tert-butyldimethylsilyl)oxy)ethyl)-4-(8-morpholino-2-(2-(quinolin-2-yl)vinyl)imidazo[1,2-a]pyrazin-5-yl)benzenesulfonamide