Rational Design and Development of<scp>Low‐Price</scp>, Scalable,<scp>Shelf‐Stable</scp>and Broadly Applicable Electrophilic Sulfonium<scp>Ylide‐Based</scp>Trifluoromethylating Reagents
作者:Yafei Liu、Yijing Ling、Hangming Ge、Long Lu、Qilong Shen
DOI:10.1002/cjoc.202100107
日期:2021.6
reagents (trifluoromethyl)(4-nitrophenyl)bis(carbomethoxy)methylide (1g) and (trifluoromethyl)(3-chlorophenyl)bis(carbomethoxy)methylide (1j) through structure-activity study was described. Under mild conditions, reagent 1g reacted with β-ketoesters and silyl enol ethers to give α-trifluoromethylated-β-ketoesters or α-trifluoromethylated ketones in high yields. In addition, reagent 1g could serve as
通过结构活性研究,描述了两种高反应性亲电三氟甲基化试剂(三氟甲基)(4-硝基苯基)双(羰基甲氧基)亚甲基(1g)和(三氟甲基)(3-氯苯基)双(羰基甲氧基)亚甲基(1j)的开发。在温和的条件下,试剂1g与β-酮酸酯和甲硅烷基烯醇醚反应,以高收率得到α-三氟甲基化的β-酮酸酯或α-三氟甲基化的酮。另外,试剂1g可以在可见光照射下用作多种三氟甲基化转变的三氟甲基自由基,包括富电子吲哚和吡咯和芳基亚磺酸钠的自由基三氟甲基化,以及苯乙烯衍生物的三氟甲基化双官能化。另一方面,作为补充,在还原偶联条件下,试剂1j与多种(杂)芳基碘化物反应以形成三氟甲基化的(杂)芳烃。