A novel class of phosphinic acid derivatives, four-membered cyclic
oxaphosphetanes, was synthesized by the reaction of bis(hydroxymethyl)phosphinic
acids with a mixture of triphenylphosphine and diisopropyl azodicarboxylate
in toluene-dichloromethane at room temperature via an intramolecular
Mitsunobu reaction.
bis(α-hydroxyalkyl)phosphinic acids - oxaphosphetane - cyclic phosphinic acids - Mitsunobu reaction