Sunlight-driven trifluoromethylation of olefinic substrates by photoredox catalysis: A green organic process
作者:Munetaka Akita、Takashi Koike
DOI:10.1016/j.crci.2015.01.013
日期:2015.7
types of catalytic photoredox processes following the reductive quenching cycle (RQC) and the oxidative quenching cycle (OQC), the discussion is focused on organic transformations based on OQC, in particular the trifluoromethylation of olefinic substrates with electrophilic trifluoromethylating reagents furnishing solvolytic addition products and substitution products. It is concluded that catalytic
Metal-free di- and tri-fluoromethylation of alkenes realized by visible-light-induced perylene photoredox catalysis
作者:Naoki Noto、Takashi Koike、Munetaka Akita
DOI:10.1039/c7sc01703k
日期:——
C(sp3)–CF2H and C(sp3)–N bond formation with the C=C moiety has been achieved in a single operation by visible-light photoredoxcatalysis. The combination of a shelf-stable and easy-to-handle sulfonium salt, S-difluoromethyl-S-di(p-xylyl)sulfonium tetrafluoroborate, and perylene catalysis is the key to the successful transformation. Furthermore, the present noble metal-free protocol allows photocatalytic
Bifunctional Metal–Organic Layer with Organic Dyes and Iron Centers for Synergistic Photoredox Catalysis
作者:Yangjian Quan、Wenjie Shi、Yang Song、Xiaomin Jiang、Cheng Wang、Wenbin Lin
DOI:10.1021/jacs.1c01083
日期:2021.3.3
Fe-TPY (TPY = 4′-(4-carboxyphenyl)[2,2′:6′,2′′-terpyridine]-5,5′′-dicarboxylate) ligands. With the organic dye EY as an efficient photosensitizer and TPY-Fe(OTf)2 as the catalytic center, Hf-EY-Fe efficiently catalyzes aminotrifluoromethylation, hydroxytrifluoromethylation, and chlorotrifluoromethylation of alkenes. Hf-EY-Fe also catalyzes the synthesis of CF3-substituted derivatives of large bioactive
and functional materials, owing to its unique properties such as electron‐withdrawing character, metabolic stability, and lipophilicity. Described herein is the PhI(OAc)2‐mediated radicaltrifluoromethylation of vinylazides with Me3SiCF3 to efficiently generate α‐trifluoromethyl azines. The resulting α‐trifluoromethyl azines were successfully transformed to valuable fluorine‐containing molecules such
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。