SCHEDULED MAINTENANCE
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.
M. Gallagher, A. Munoz, G. Gence and M. Koenig, J. Chem. Soc., Chem. Commun., 1976, 321 DOI: 10.1039/C39760000321
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