Electronic and steric effects controlling efficiencies of photoaddition reactions of fullerene C60 with N-α-trimethylsilyl-N-alkyl-N-benzylamines
作者:Ho Cheol Jeong、Suk Hyun Lim、Youngku Sohn、Young-Il Kim、Hoeun Jang、Dae Won Cho、Patrick S. Mariano
DOI:10.1016/j.tetlet.2017.01.073
日期:2017.3
electron transfer (SET)-promoted photoaddition reactions between fullerene C60 and both various alkyl (Me, Et, i-Pr, t-Bu)- and para-substituted (p-Me, p-OMe, p-F, p-CF3) arene ring containing, N-α-trimethylsilyl-N-alkyl-N-benzylamines were explored to gain information about photoproduct profiles and how the electronic and steric nature of the amine substrates influence reaction efficiencies. The results
富勒烯C 60与各种烷基(Me,Et,i -Pr,t -Bu)-和对位取代(p -Me,p -OMe,p -F,p的单电子转移(SET)促进的光加成反应-CF 3)芳烃环,N -α-三甲基甲硅烷基-N-烷基-N-苄基胺被研究以获得关于光产物分布以及胺底物的电子和空间性质如何影响反应效率的信息。结果表明,可见光(λ> 540 nm)照射了含C 60的10%乙醇溶液和Ñ -α三甲基甲硅烷ñ -烷基- ñ -benzylamines产生1-氨基甲基-1,2- dihydrofullerenes作为唯一光化产物。此外,含有N -α-三甲基甲硅烷基-N-烷基-N-苄基胺的未取代和对电子给体基团取代的芳环的SET促进的光加成反应比含有对位的那些产生了更有效的光产物。-吸电子基团取代的芳烃环。此外,尽管在控制反应效率方面,位阻因素不如胺底物的电子性质重要,但位阻在缺乏电子的胺底物的光反应中确实起着重要作用。