申请人:The Procter & Gamble Company
公开号:US06066740A1
公开(公告)日:2000-05-23
The present invention provides a process for making 2-amino-2-imidazoline, guanidine, and 2-amino-3,4,5,6-tetrahydroyrimidine derivatives by preparing the corresponding activated 2-thio-subsituted-2-derivative in a two-step, one-pot procedure and by further reacting yields this isolated derivative with the appropriate amine or its salts in the presence of a proton source. The present process allows for the preparation of 2-amino-2-imidazolines, quanidines, and 2-amino-3,4,5,6-tetrahydropyrimidines under reaction conditions that eliminate the need for lengthy, costly, or multiple low yielding steps, and highly toxic reactants. This process allows for improved yields and product purity and provides additional synthetic flexibility.
本发明提供了一种制备2-氨基-2-咪唑啉、胍和2-氨基-3,4,5,6-四氢嘧啶衍生物的方法,通过在两步一锅程序中制备相应活化的2-硫代取代-2-衍生物,并进一步在质子源存在下将得到的孤立衍生物与适当的胺或其盐反应。本方法允许在消除了冗长、昂贵或多次低产率步骤以及高毒性反应物的反应条件下制备2-氨基-2-咪唑啉、胍和2-氨基-3,4,5,6-四氢嘧啶。该方法提高了产率和产品纯度,并提供了额外的合成灵活性。