A method of preparing Compound (1):
or a pharmaceutically acceptable salt thereof includes: a) reacting Compound (A) with 3,3-dimethylbut-1-yne in the presence of one or more palladium catalysts selected from the group consisting of Pd(PPh
3
)
4
and Pd(PPh
3
)
2
Cl
2
, and one or more copper catalysts selected from the group consisting of CuI, CuBr, and CuCl, to generate Compound (B); b) treating Compound (B) with an acid to generate Compound (C): c) reducing the cyclohexanone of Compound (C) to cyclohexanol to generate Compound (D); and d) reacting Compound (D) with a base to generate Compound (1), wherein Compounds (A), (B), (C), and (D) are each as depicted herein.
制备化合物(1)或其药学上可接受的盐的方法包括:a)在选择自Pd(PPh3)4和Pd(PPh3)2Cl2组成的一种或多种
钯催化剂和选择自CuI,CuBr和CuCl组成的一种或多种
铜催化剂的存在下,将化合物(A)与3,3-二甲基丁-1-炔反应,生成化合物(B);b)用酸处理化合物(B)生成化合物(C);c)还原化合物(C)的
环己酮为
环己醇,生成化合物(D);和d)将化合物(D)与碱反应,生成化合物(1),其中化合物(A),(B),(C)和(D)如此处所示。