The invention provides a novel process, novel process steps and novel intermediates useful in the synthesis of pharmaceutically active compounds, especially renin inhibitors, such as Allskiren. Inter alia, the invention provides a process for the manufacture of a compound of the formula III,
wherein R, R
1
, R
2
, R
3
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的过程、新的过程步骤和新的中间体,用于合成药物活性化合物,特别是肾素
抑制剂,例如Allskiren。此外,本发明还提供了一种制备式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。该制备方法包括(最好是由)将式I化合物与能够将羟基转化为X的试剂反应,其中X例如是一个离去基团。