1<i>H</i>‐1,2,4‐Diazaphospholes via 2‐Phosphaallyl Chlorides

Abstract

The same P atom bonding pattern as in phosphabenzene is found in the 1H-1,2,4-diazaphospholes 1. It is therefore not surprising that 1 can be prepared in a two-step synthesis, the first step of which is reminiscent of the classical phosphabenzene synthesis.