The present invention related to a process for the preparation of formula (I), wherein R1 is C1-6-alkyl and R2 is hydrogen or halogen. (R)-2-phenyl propionic acid derivatives of the formula (I) are key intermediates in the synthesis of 5-substituted -pyrazine or pyridine glucokinase activators of the formula (Xa) as disclosed in PCT International Patent Application No. WO 2004/052869 A1, which have the potential to be useful as glucokinase activators are useful for the treatment and/or prophylaxis of type II diabetes.
本发明涉及一种制备化合物(I)的方法,其中R1为C1-6-烷基,R2为氢或卤素。化合物(I)的(R)-
2-苯基丙酸衍
生物是5-取代
吡啶或
吡啶葡萄糖激酶激活剂合成中的关键中间体,如
PCT国际专利申请号WO 2004/052869 A1所披露的,这些化合物具有潜力用作
葡萄糖激酶激活剂,可用于治疗和/或预防II型糖尿病。