摘要
以4-甲氧羰基哌啶盐酸盐(2)和对三氟甲氧基苯甲酰氯(3)为起始原料,在三乙胺的作用下以92.7%的收率制得化合物(4);化合物(4)甲醇水溶液中,在弱碱氢氧化锂作用下,以95.4%的收率水解为化合物(5);化合物(5)在羰基二咪唑与N-甲基-N-甲氧基盐酸盐作用,以94.2%的收率制得化合物(6);化合物(6)和4-甲氧基苯基溴化镁偶联,以60.1%的收率制得化合物(1)。4步反应总收率50.0%。
A Practical synthesis of 1 - (4 - trifiuromethoxylbenzoyl) - 4 - (4 - methoxylbenzoyl) piperidine ( 1 ) was described. 4- trifluromethoxylbenzoyl chloride(3) was treated with 1.5 equiv, of methylisonipeeotate(2) in DCM in the presence of triethylamine to form compound (4) in 92.7% yield. The compound(4)then treated with aqueous LiOH to produce (5) in 95.4% yield. After the compound (5) was converted into (6) in 94.2% yield, the compound (6) then coupled with Grignard agent of compound (7) to obtain compound (1) in 60.1% yield.
出处
《化工时刊》
CAS
2006年第8期44-46,共3页
Chemical Industry Times