Stable mono- and dicarboxylate phosphabetaines with α-location of the phosphonium center relative to the carboxylate group on the basis of methyldiphenylphosphine, triphenylphosphine, 3-(diphenylphosphino)propionic acid, various bisdiphenylphosphines and glyoxylic acid have been synthesized.

中文翻译：

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稳定的羧酸膦甜菜碱的合成-金属配合物的潜在配体

基于甲基二苯基膦，三苯基膦，3-（二苯基膦基）丙酸，各种双二苯基膦和乙醛酸，已经合成了相对于羧酸根基团具有α中心相对于羧酸根基团α-位的稳定的单和二羧酸膦甜菜碱。