The present invention is directed to a process for preparing compounds of formula (I): wherein A, R
1
-R
3
, X, s, t, u, m and Z are defined herein, comprising the step of reacting a reagent of formula (II): in the presence of Pd(O) metal with a compound of formula (III): or salts thereof. Another aspect of this invention is a method of preparing compounds of formula (VI).
本发明涉及一种制备式(I)化合物的过程:其中A、R1-R3、X、s、t、u、m和Z在此定义,包括在Pd(O)
金属存在下将式(II)试剂与式(III)化合物或其盐反应的步骤。本发明的另一个方面是一种制备式(VI)化合物的方法。