The present invention provides a novel process, novel process steps and novel intermediates useful in the synthesis of pharmaceutically active compounds, especially renin inhibitors, such as Aliskiren. Inter alia, the invention provides a process for the manufacture of a compound of the formula III,
wherein R, R1, R2, R3 and PG are as defined in the specification, or a salt thereof. The manufacture comprises (preferably consists of) reacting a compound of the formula I,
with a reagent able to transform hydroxy into X where X is for example a leaving group.
本发明提供了一种新颖的过程、新颖的过程步骤和新颖的中间体,可用于合成药物活性化合物,特别是肾素
抑制剂,如阿利司他。此外,本发明提供了一种用于制造公式III化合物或其盐的方法,其中R、R1、R2、R3和
PG如规范中所定义。制造包括(最好仅包括)将公式I化合物与能将羟基转化为X的试剂反应,其中X例如是一个离去基团。