AbstractHerein we demonstrate a tricyclohexylphosphine‐catalyzed cycloaddition of (E)‐ or (Z)‐alkyl 5‐substituted phenylpent‐2‐en‐4‐ynoates with [60]fullerene to give cyclopentenofullerenes in good to excellent yields, through initial chemo‐ and regioselective 1,4‐addition of phosphines at the β‐carbon of the enyne substrates. The nucleophilic addition pattern of P(cHx)3 is found to be different from that of Gilman or Grignard reagents toward the studied enynes. The resulting cyclopentenofullerenes, characterized with spectrometric methods and single crystal X‐ray diffraction analysis, exhibit comparable or higher LUMO energy levels than a typical n‐type material, [6,6]‐phenyl‐C61‐butyric acid methyl ester (PCBM).magnified image
AbstractHerein we demonstrate a tricyclohexylphosphine‐catalyzed cycloaddition of (E)‐ or (Z)‐alkyl 5‐substituted phenylpent‐2‐en‐4‐ynoates with [60]fullerene to give cyclopentenofullerenes in good to excellent yields, through initial chemo‐ and regioselective 1,4‐addition of phosphines at the β‐carbon of the enyne substrates. The nucleophilic addition pattern of P(cHx)3 is found to be different from that of Gilman or Grignard reagents toward the studied enynes. The resulting cyclopentenofullerenes, characterized with spectrometric methods and single crystal X‐ray diffraction analysis, exhibit comparable or higher LUMO energy levels than a typical n‐type material, [6,6]‐phenyl‐C61‐butyric acid methyl ester (PCBM).magnified image
Palladium-Catalyzed Regio- and Stereoselective Hydrosulfonation of Propiolate Esters
作者:Shih-Ching Chuang、Selvam Raju、Pratheepkumar Annamalai、Fu-Wei Chan、Po-Yen Tseng、Po-Yen Chen、Ting-Shen Kuo
DOI:10.1055/s-0036-1588501
日期:2017.11
propiolate esters to yield alkenyl sulfonates is demonstrated. The formation of alkenyl sulfonates is highly regio- and stereoselective with favorable yields of up to 95%, and two of the alkenyl sulfonates are utilized for a Sonogashira cross-coupling reaction to produce (Z)-1,3-enynoates. An efficient palladium-catalyzed addition reaction of alkyl- and arylsulfonic acids to propiolate esters to yield
Chemo-, Regio- and Stereoselective Tricyclohexylphosphine-Catalyzed [3+2] Cycloaddition of Enynes with [60]Fullerene Initiated by 1,4-Michael Addition: Synthesis of Cyclopenteno[60]fullerenes and their Electrochemical Properties
作者:Po-Yen Tseng、Shih-Ching Chuang
DOI:10.1002/adsc.201300255
日期:2013.8.12
AbstractHerein we demonstrate a tricyclohexylphosphine‐catalyzed cycloaddition of (E)‐ or (Z)‐alkyl 5‐substituted phenylpent‐2‐en‐4‐ynoates with [60]fullerene to give cyclopentenofullerenes in good to excellent yields, through initial chemo‐ and regioselective 1,4‐addition of phosphines at the β‐carbon of the enyne substrates. The nucleophilic addition pattern of P(cHx)3 is found to be different from that of Gilman or Grignard reagents toward the studied enynes. The resulting cyclopentenofullerenes, characterized with spectrometric methods and single crystal X‐ray diffraction analysis, exhibit comparable or higher LUMO energy levels than a typical n‐type material, [6,6]‐phenyl‐C61‐butyric acid methyl ester (PCBM).magnified image