已经开发了在光氧化还原催化下具有易于获得的C 6 F 5 I(OCOCF 3)2的可扩展且操作简单的(杂)芳烃的脱羧三氟甲基化。该方法可耐受各种(杂)芳烃和官能团。值得注意的是,C 6 F 5 I从脱羧反应中再循环并进一步用于制备C 6 F 5 I(OCOCF 3)2。光氧化还原催化和高价碘试剂的结合为三氟乙酸在三氟甲基化反应中的应用提供了一种实用的方法。
Intermolecular Aminotrifluoromethylation of Alkenes by Visible-Light-Driven Photoredox Catalysis
作者:Yusuke Yasu、Takashi Koike、Munetaka Akita
DOI:10.1021/ol4006272
日期:2013.5.3
Intermolecular aminotrifluoromethylation of alkenes catalyzed by [Ru(bpy)3]2+ under visible light irradiation has been explored. The present photocatalytic protocol achieves highlyefficient and regioselectivedifunctionalization of C═Cbonds, leading to a variety of β-trifluoromethylamines. The reaction is applied to “late-stage aminotrifluoromethylation” of steroid and amino acid scaffolds.
A novel vicinal aminotrifluoromethylation of alkenes using CF3SO2Na as a trifluoromethyl precursor and acetonitrile as an N-nucleophile has been achieved by an electrooxidative strategy. The present electrochemical protocol achieves efficient and highly regioselective difunctionalization of CC bonds under metal-free and external oxidant-free electrolysis conditions, leading to a series of β-trifluoromethylamine
已经通过电氧化策略实现了使用CF 3 SO 2 Na作为三氟甲基前体和乙腈作为N-亲核体的烯烃的邻位氨基三氟甲基化。本电化学方案在无金属和无外部氧化剂的电解条件下实现了C C键的高效且高度区域选择性的双官能化,从而产生了一系列具有良好至优异收率的β-三氟甲胺化合物。证实了该反应涉及自由基过程,因为CF 3自由基被清除剂捕获并且β-三氟甲基化自由基被BHT捕获,并且氘标记实验证明产物中的氧气来自水。
Photocatalytic Keto- and Amino-Trifluoromethylation of Alkenes
作者:Zheng Wang、Jin-Hong Lin、Ji-Chang Xiao
DOI:10.1021/acs.orglett.4c00447
日期:2024.3.8
Efforts to develop alternatives to triflicanhydride (Tf2O) as a trifluoromethylation reagent continue due to its limitations, including volatility, corrosiveness, and moisture sensitivity. Described herein is the use of a trifluoromethylsulfonylpyridinium salt (TFSP), easily obtained by a one-step reaction of Tf2O with 4-dimethylaminopyridine, as a reagent for the trifluoromethylative difunctionalization