Process for the preparation of lyophilized 2 - (3-aminopropyl) amino ethanethiol, lyophilized 2 - (3-aminopropyl) amino ethanethiol, process for the preparation of a thermogel composition and thermogel composition

摘要

The present invention relates to a process for the preparation of lyophilized 2 - [(3-aminopropyl) amino] ethanethiol, comprising the following steps: a) reacting a solution of amifostine with a strong acid to obtain a solution of 2 - [(3-aminopropyl) amino] ethanethiol, and b) lyophilization of the 2 - [(3-aminopropyl) amino] ethanethiol solution, with or without the addition of excipients.