Phosphino sulphonates, a type of P<sup>III</sup>-anhydride and their isomerisation into phosphinoyl sulphinates: a novel rearrangement in phosphorus–sulphur chemistry
The imidazolides (1) react smoothly with RSO3H to afford a novel class of trico-ordinate phosphorus anhydride, the phosphinosulphonates (2); under sutable structure circumstances the compounds (2) undergo a noveltype of rearrangement, (2)→(6), which provides the first example of a phosphinoylsulphinate structure (6).