Rh‐Catalyzed Hydration/C−F Bond Cleavage of Fluorinated Diazoalkanes Enabling Synthesis of α‐Fluoro‐β‐ketophosphonates
作者:Qian Wang、Jiang Liu、Haibo Mei、Romana Pajkert、Gerd‐Volker Röschenthaler、Jianlin Han
DOI:10.1002/adsc.202300595
日期:2023.9.5
(β-Diazo-α,α-difluoroethyl)phosphonates have been emerging as useful building blocks in organic synthetic chemistry in recent years, which can be used as diazo analog or masked carbene for the rapid assembly of difluoromethylene phosphonate-containing compounds. Herein, we elaborate a method for the synthesis of α-fluoro-β-ketophosphonates from hydration/C−F bond cleavage of in situ generated (β-amino-α
近年来,(β-重氮-α,α-二氟乙基)膦酸酯已成为有机合成化学中有用的构建单元,可用作重氮类似物或掩蔽卡宾,用于快速组装含二氟亚甲基膦酸酯的化合物。在此,我们详细阐述了一种通过 Rh-卡宾中间体,通过原位生成的 (β-氨基-α,α-二氟乙基)膦酸酯的水合/C−F 键断裂来合成 α-氟-β-酮膦酸酯的方法。该反应可耐受多种(β-氨基-α,α-二氟乙基)膦酸酯,以良好的产率提供 α-氟-β-酮膦酸酯。该反应以原位生成的水为偶联伙伴,代表了(β-重氮-α,α-二氟乙基)膦酸酯的反应,也是生成具有生物活性的α-氟-β-酮膦酸酯的方法。