Substituent effects on the <sup>13</sup>
C NMR chemical shifts of the imine carbon in <i>N</i>
-(4-X-benzylidene)-4-(4-Y-styryl) anilines
作者:Zhengjun Fang、Chenzhong Cao、Guanfan Chen
DOI:10.1002/poc.3032
日期:2012.12
Long‐range electronic substituent effects were targeted using the substituent dependence of δC(C═N), and specific cross‐interactions were explored extendedly. A wide set of N‐(4‐X–benzylidene)‐4‐(4‐Y–styryl) anilines, p‐X–C6H4CH═NC6H4CH═CHC6H4–p‐Y (X = NMe2, OMe, Me, H, Cl, F, CN, or NO2; Y = NMe2, OMe, Me, H, Cl, or CN) were prepared for this study, and their 13C NMR chemical shifts δC(C═N) of C═N bonds
使用δC(C effectsN)的取代基依赖性来靶向远程电子取代基效应,并广泛地探索了特定的交叉相互作用。宽组ñ - (4-X -亚苄基)-4-(4--Y-苯乙烯基)苯胺,p -X-C 6 H ^ 4 CH═NC 6 ħ 4 CH = CHC 6 H ^ 4 - p -Y( X = NMe 2,OMe,Me,H,Cl,F,CN或NO 2; Y = NMe 2,OMe,Me,H,Cl或CN)用于本研究,并进行13 C NMR化学位移δ ç测定了C═N键的(C═N)。结果表明,取代基Y对两个电感和共振效应δ Ç的(C = N)p -X-C 6 H ^ 4 CH═NC 6 ħ 4 CH = CHC 6 H ^ 4 - p -Y不太比那些取代基的Y p -X-C 6 H ^ 4 CH═NC 6 ħ 4 - p‐Y。此外,随着共轭链的长度延长,C = N功能的电子特性对通过取代基X或Y的电子给予/电