Cyclic organophosphorus compounds. II. Some sterically hindered cyclic hypophosphate systems and related compounds

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Abstract
The synthesis of three new cyclic hypophosphate systems from 2,2-dimethylpropane-1,3-diol is described. Evidence concerning the presence of the P—P bond in the cyclic hypophosphate and cyclic dithiohypophosphate was obtained by chlorinolysis.In addition, the reactions between 2-ethoxy-5,5-dimethyl-1,3,2-dioxaphosphorinan and 2-chloro-2-oxo-5,5-dimethyl-1,3,2-dioxaphosphorinan and between 2-hydroxy-5,5-dimethyl-1,3,2-dioxaphosphorinan and 2-chloro-5,5-dimethyl-1,3,2-dioxaphorinan are discussed as possible routes to cyclic hypophosphates.Several characteristic features of the infrared spectra of cyclic hypophosphate systems, related compounds, and their acyclic analogues are indicated.

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