Direct synthesis of γ,γ-diketophosphonates from pentacovalent 1,2λ<sup>5</sup>-oxaphosphorane
作者:Tae Woo Kim、Chung-Min Park、Kang-Yeoun Jung
DOI:10.1080/10426507.2023.2198713
日期:2023.10.3
efficient procedure to prepare γ,γ-diketophosphonates via reactions between 1,2λ5-oxaphospholene and aromatic acid chlorides under mild conditions is proposed herein. The formation of the keto phosphonium ion of 1,2λ5-oxaphospholenes is favored at −10 °C, and these ions react with aromatic acid chlorides to yield γ,γ-diketophosphonates in 83–89% yields. This reaction may be readily applied for the preparation
摘要 吡唑膦酸酯衍生物因其广泛的生物活性而在医药领域受到越来越多的关注。然而,作为α-吡唑膦酸酯前体的二酮膦酸酯的合成需要高温和过量的反应物才能进行。因此,本文提出了一种在温和条件下通过1,2λ 5-氧杂磷烯与芳香酰氯反应制备γ,γ-二酮膦酸盐的简单而有效的方法。1,2λ 5酮基鏻离子的形成-10 °C 时有利于生成-氧杂磷烯,这些离子与芳香酰氯反应生成 γ,γ-二酮膦酸盐,产率为 83-89%。该反应可以很容易地应用于制备α-二酮膦酸酯的γ,γ-衍生物作为α-吡唑膦酸酯的前体,而α-吡唑膦酸酯是具有巨大医学意义的分子。