NOVEL UNSYMMETRICAL N, N-BIS (METHYLENE) BISPHOSPHONIC ACIDS OF α, ω-DIAMINES. PREPARATION AND CHARACTERIZATION OF [[(2-AMINOETHYL …

D Redmore, B Dhawan

文献索引：Redmore, Derek; Dhawan, Balram Phosphorus and Sulfur and the Related Elements, 1983 , vol. 16, p. 233 - 238

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被引用次数: 9

摘要

Abstract Reaction of ethylenediamine with phosphorous acid and formaldehyde in molar ratio 1: 2: 2 gives [[(2-aminoethyl) imino] bis (methylene)] bisphosphonic acid (2a) as the major product. Similarly, reaction of hexamethylenediamine with phosphorous acid and formaldehyde in molar ratio 1: 2: 2 yields [[(6-aminohexyl) imino] bis (methylene)] bisphosphonic acid (2b) which is isolated either as [[(6-carbobenzoxyaminohexyl) imino] ...