Synthesis, Structure, and First Reactivity Studies of Functional (Phosphinoamino)boranes

Abstract

Functional phosphanes having a P–N–B motif were obtained by treatment of chloro(organo)phosphanes with boryl amides. Compounds 4a–e are stable up to 100 °C and show no association in solution, even at low temperature (–70 °C). The functional phosphanes were characterized by NMR and IR spectroscopy, MS, and microanalysis, and phosphanes 4a, 4c, and 4e were additionally scrutinized by single‐crystal X‐ray crystallography. Preliminary studies on chlorine/lithium exchange of 4a led to anionic azaphosphaboriridine 5a′.

Abstract

The synthesis and structure of several functional phosphanes having a P–N–B motif are presented. The title compounds exhibit remarkable thermal stability, unlike earlier reported examples, and enable chlorine/lithium exchange leading to the first anionic azaphosphaboriridine.