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。
Alkenylation of C−H Bonds via Reaction with Vinyl and Dienyl Triflones. Stereospecific Synthesis of Trisubstituted Vinyl Triflones via Organocopper Addition to Acetylenic Triflones<sup>1</sup>
作者:Jason Xiang、P. L. Fuchs
DOI:10.1021/ja962790b
日期:1996.1.1
Stereo- and Regiospecific Syntheses of α- and β-Substituted Vinyl and Dienyl Triflones via the Stille Reaction<sup>1</sup>
作者:Jason S. Xiang、A. Mahadevan、P. L. Fuchs
DOI:10.1021/ja954303i
日期:1996.1.1
Acetylenic anions undergo efficient sulfonylation with trifluoromethanesulfonic anhydride to provide acetylenictriflones. These materials are stereospecifically converted to (Z)-β-iodovinyl triflones in one step via the addition of hydrogen iodide. Access to (Z)-α-iodovinyl triflones is also possible via a two-step process involving tributyltin hydride addition to the acetylenictriflones to generate
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。