Synthesis and properties of phosphabetaine structures: III. Phosphabetaines derived from tertiary phosphines and α,β-unsaturated carboxylic acids. Synthesis, structure, and chemical properties

Abstract

Methods of synthesis of acylate phosphabetaines by reactions of triphenylphosphine with methacrylic, cinnamic, and p-methoxycinnamic acids are developed. The phosphabetaine form is proposed to exist in equilibrium with the (σ⁵-oxaphospholane form. The features of methylation of the phosphabetaines are discussed.