This paper describes a convenient and efficient synthesis of new (2R)-5-substituted-5-(diethylphosphono)-penta-3,4-dien-1,2-diols. Phosphorylated allenic glycols are stable enough compounds, but under basic conditions they cyclized to (3R)-5-(3-hydroxy-2,3-dihydrofuryl)(diethylphosphono)alkanes through intramolecular nucleophilic addition of the terminal alkoxide to the central carbon atom of the allene system. Treatment of (3R)-5-(3-hydroxy-2,3-dihydrofuryl)(diethylphosphono)alkanes with a catalytic amount of p-toluenesulfonic acid in chloroform at 40-45 °C for 0.5 hours afforded diethylphosphono(2-furyl)alkanes.
                                    本文描述了新型 (2R)-5-取代-5-(
二乙基膦酰基)-五-3,4-二烯-1,2
-二醇的便捷高效合成方法。
磷酸化联二烯二醇是足够稳定的化合物,但在碱性条件下,它们通过末端醇盐与中心碳原子的分子内亲核加成环化为(3R)-5-(3-羟基-
2,3-二氢呋喃基)(
二乙基膦酰基)
烷烃丙二烯系统。在
氯仿中于40-45℃下用催化量的
对甲苯磺酸处理(3R)-5-(3-羟基-
2,3-二氢呋喃基)(
二乙基膦酰基)
烷烃0.5小时,得到
二乙基膦酰基(2-
呋喃基)
烷烃。