A simple, cost-effective method for deuteration of carbonyl compounds employing pyrrolidine as catalyst and D2O as deuterium source was described. High degree of deuterium incorporation (up to 99%) and extensive functional group tolerance were achieved. It is the first time that secondary amines are used as catalysts for H/D exchange of carbonyl compounds, which also allow the deuteration of complex pharmaceutically interesting substrates. A possible catalytic mechanism, based on the hydrolysis of 1-pyrrolidino-1-cyclohexene, for this pyrrolidine-catalyzed H/D exchange reaction has been proposed.
描述了一种简单、成本效益高的方法,通过使用
吡咯烷作为催化剂和D2O作为
氘源来实现羰基化合物的
氘化。实现了高度的
氘掺入(高达99%)和广泛的功能团耐受性。这是首次使用二级胺作为羰基化合物氢/
氘交换的催化剂,该方法还允许对复杂的具有药学意义的底物进行
氘化。基于1-
吡咯啉-1-
环己烯的
水解,提出了这种
吡咯啉催化氢/
氘交换反应的可能催化机制。