Ethyl 2-(azetidin-3-yl((6-(7-(4-(3-cyclopropylureido)-2-fluorophenoxy)thieno[3,2-b]pyridin-2-yl)pyridin-3-yl)methyl)amino)acetate 、 、
异氰酸乙酯 在
水 作用下,
以
四氢呋喃 为溶剂,
反应 1.0h,
以to afford the title compound 433 (78 mg, 88% yield for 2 steps) as a beige solid的产率得到ethyl 2-(((6-(7-(4-(3-cyclopropylureido)-2-fluorophenoxy)thieno[3,2-b]pyridin-2-yl)pyridin-3-yl)methyl)(1-(ethylcarbamoyl)azetidin-3-yl)amino)acetate