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Abstract
From alkylene oxides and hypophosphorous acid 2-hydroxyesters of the hypophosphorous acid are formed. They undergo an exchange reaction with 2-butyne-1,4-diol as a result of which the corresponding glycol and 1-methylolallenephosphonous acid are obtained. The yield of the acid is quantitative. According to this method also 2-hydroxy esters of 1-methylolallenephosphonous acid are formed.