Iron(II)-Catalyzed Site-Selective Functionalization of Unactivated C(sp<sup>3</sup>
)−H Bonds Guided by Alkoxyl Radicals
作者:Honghao Guan、Shutao Sun、Ying Mao、Lei Chen、Ran Lu、Jiancheng Huang、Lei Liu
DOI:10.1002/anie.201806434
日期:2018.8.27
for site‐selectivefunctionalization of unactivated methylene and methine C−H bonds enabled by an FeII‐catalyzed redox process is described. The mild, expeditious, and modular protocol allows efficient remote aliphatic fluorination, chlorination, amination, and alkynylation of structurally and electronically varied primary, secondary, and tertiary hydroperoxides with excellent functional‐group tolerance
Stereospecific Alkenylation of C−H Bonds via Reaction with β-Heteroatom-Functionalized Trisubstituted Vinyl Triflones<sup>1</sup>
作者:Jason Xiang、Wanlong Jiang、Jianchun Gong、P. L. Fuchs
DOI:10.1021/ja963636s
日期:1997.5.1
Aryl and alkyl β-heteroatom-trisubstituted vinyltriflones react with THF and cyclohexane to undergo trifluoromethyl radical-mediated C−H functionalization reactions to afford E and Z β-heteroatom-trisubstituted olefins. Most reactions proceed with both high yield and high stereospecificity (retention of configuration). β-Substituents which have been employed in this study are iodine, bromine, fluorine
芳基和烷基 β-杂原子三取代乙烯基三氟乙烯与四氢呋喃和环己烷反应,进行三氟甲基自由基介导的 CH 官能化反应,得到 E 和 Z β-杂原子三取代烯烃。大多数反应以高产率和高立体特异性(构型保留)进行。本研究中使用的β-取代基是碘、溴、氟、苯甲酸酯、碳酸乙酯和邻苯二甲酰亚胺。带有强大电子释放基团(如烷氧基或氨基)的 β-取代基使乙烯基三氟乙烯失去反应性。
Alkynylatlon of aldehydic CH bonds via reaction with acetylenic triflones
作者:Jianchun Gong、P.L. Fuchs
DOI:10.1016/s0040-4039(96)02413-6
日期:1997.2
Reaction of aldehydes with acetylenic triflones affords acetylenic ketones and alkylated acetylenesvia the intermediacy of acyl radicals, the product ratio being highly dependent upon aldehyde structure and reaction conditions.
Functionalisation of ethereal-based saturated heterocycles with concomitant aerobic C–H activation and C–C bond formation
作者:Nehaal Ahmed、Richard J. Spears、Tom D. Sheppard、Vijay Chudasama
DOI:10.1039/d2sc01626e
日期:——
emphasis on sustainable synthesis, aerobic C–Hactivation (the use of oxygen in air to activateC–H bonds) represents a highly attractive conduit for the development of novel synthetic methodologies. Herein, we report the air mediated functionalisation of various saturated heterocycles and ethers via aerobically generated radical intermediates to form new C–C bonds using acetylenic and vinyl triflones as radical
[EN] METHOD FOR PREPARING TRIFLUOROHYDROCARBYL SULFONE COMPOUND<br/>[FR] PROCÉDÉ DE PRÉPARATION D'UN COMPOSÉ DE TRIFLUOROHYDROCARBYLE SULFONE<br/>[ZH] 三氟烃基砜类化合物的制备方法