Synthesis of a New Class of Phosphinic Acids: Synthesis of Novel Four-Membered Cyclic Oxaphosphetanes by Intramolecular Mitsunobu Reaction of Bis(α-hydroxyalkyl)phosphinic Acids
novel class of phosphinicacid derivatives, four-membered cyclic oxaphosphetanes, was synthesized by the reaction of bis(hydroxymethyl)phosphinicacids with a mixture of triphenylphosphine and diisopropyl azodicarboxylate in toluene-dichloromethane at room temperature via an intramolecular Mitsunobu reaction. bis(α-hydroxyalkyl)phosphinicacids - oxaphosphetane - cyclicphosphinicacids - Mitsunobu reaction
Studies on the synthesis of novel four-membered cyclic oxaphosphetanes from bishydroxyphosphinic acids is reported. Investigations showed that the conversion proceeds through an intramolecular Mitsunobu cyclisation of bishydroxyphosphinic acids with a mixture of triphenylphosphine and diisopropylazodicarboxylate (DIAD) in toluene–CH 2 Cl 2 at room temperature. The treatment of two diastereomers of