The chemistry of the phosphoryl linkage: examples of P IV ? P V and P IV ? P VI transformation under mild conditions

Abstract
Catechol and substituted catechols react with phosphonic acid or with phosphoryl chloride under mild conditions to give P-spirobis-(o-arylenedioxy)phosphoranes; where the non-cyclic substituent at phosphorus is a catechol residue the phosphoranes are readily transformed by organic bases into corresponding tris-(o-aryl-enedioxy)phosphate anions.

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