Disclosed herein is an improved process for the preparation of substituted cyclopentanamine derivatives, which are useful intermediates in the preparation of triazolo[4,5-d]pyrimidine compounds. Particularly described is an improved, commercially viable and industrially advantageous process for the preparation of a ticagrelor intermediate, [3aR-(3aα,4α,6α,6aα]-2-[[6-amino-2,2-dimethyltetrahydro-4H-cyclopenta-1,3-dioxol-4-yl]oxy]-ethanol, alternatively named, 2-[[(3aR,4S,6R,6aS)-6-amino-2,2-dimethyltetrahydro-3aH-cyclopenta[d][1,3]-dioxol-4-yl]oxy]-1-ethanol.
本文披露了一种改进的制备取代
环戊胺衍
生物的工艺,这些衍
生物是制备三唑并[4,5-d]
嘧啶化合物的有用中间体。特别描述了一种改进的、商业上可行的和工业上有利的工艺,用于制备
替格瑞洛的中间体,[3aR-(3aα,4α,6α,6aα]-2-[[6-
氨基-2,2-二甲基四氢-4H-环戊-1,3-二氧杂环-4-基]氧基]-
乙醇,又名2-[[(3aR,4S,6R,6aS)-6-
氨基-2,2-二甲基四氢-3aH-环戊[d][1,3]-二氧杂环-4-基]氧基]-1-
乙醇。