A Practical and Scalable Synthesis of a Glucokinase Activator via Diastereomeric Resolution and Palladium-Catalyzed C–N Coupling Reaction
作者:Yohei Yamashita、Yasuhiro Morinaga、Makoto Kasai、Takao Hashimoto、Yuji Takahama、Atsushi Ohigashi、Satoshi Yonishi、Motohiro Akazome
DOI:10.1021/acs.oprd.6b00415
日期:2017.3.17
the practical synthesis of glucokinase activator (R)-1 as a potential drug for treating type-2 diabetes. The key intermediate, chiral α-arylpropionic acid (R)-2, was synthesized in high diastereomeric excess through the diasteromeric resolution of 7 without the need for a chiral resolving agent. The counterpart 2-aminopyrazine derivative 3 was synthesized using a palladium-catalyzed C–N coupling reaction
在这里,我们描述了实际合成葡萄糖激酶激活剂(R)-1作为治疗2型糖尿病的潜在药物的方法的研究和开发。关键中间体,手性α-芳基丙酸(R)-2,通过非对映异构体拆分为7(非对映异构体过量)而合成,不需要手性拆分剂。相应的2-氨基吡嗪衍生物3是使用钯催化的C–N偶联反应合成的。这个有效的过程在中试规模上得到了证明,并产生了19.0 kg (R)-1。而且,通过差向异构化过程获得(R)-7从不需要的(S)-7中发展出来。