An Electron-Rich Proazaphosphatrane for Isocyanate Trimerization to Isocyanurates

A facile synthesis of the new electron-rich, sterically hindered proazaphosphatrane shown above is described herein. This proazaphosphatrane catalyzes the cyclotrimerization of a wide variety of isocyanates to isocyanurates under mild conditions with unprecedentedly fast reaction times, giving moderate to high product yields. It is also shown that this proazaphosphatrane can be recycled up to 5 times.

本文详细描述了一种新型富电子、空间位阻较大的前亚磷磷杂环烷的简易合成方法。该前亚磷磷杂环烷在温和条件下催化多种异氰酸酯的环三聚反应，展现出前所未有的快速反应速率，并实现中到高产品产率的稳定输出。此外，实验还证实该前亚磷磷杂环烷可循环使用高达五次。