A method of preparing Compound (1): or a pharmaceutically acceptable salt thereof includes: a) reacting Compound (A) with 3,3- dimetylbut-l-yne in the presence of one or more palladium catalysts selected from the group consisting of Pd(PPh3)4 and Pd(PPh3)2Cl2, and one or more copper catalysts selected from the group consisting of Cul, 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Cul,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)将化合物(C)的
环己酮还原为
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。