作者:Ivo Zenz、Herbert Mayr
DOI:10.1021/jo201678u
日期:2011.11.18
reactions of the trans-β-nitrostyrenes 1a–f with the acceptor-substituted carbanions 2a–h have been determined in dimethyl sulfoxide solution at 20 °C. The resulting second-order rate constants were employed to determine the electrophile-specific reactivity parameters E of the trans-β-nitrostyrenes according to the correlation equation log k2(20 °C) = sN(N + E). The E parameters range from −12 to −15
已在20°C的二甲基亚砜溶液中测定了反式-β-硝基苯乙烯1a - f与受体取代的碳负离子2a - h的反应动力学。将得到的二级速率常数用于确定特定的亲电子反应性参数Ë所述的反式根据所述相关方程日志-β-硝基苯乙烯 ķ 2(20℃)=小号Ñ(Ñ + ë)。该Ë在我们的经验亲电等级(www.cup.lmu.de/oc/mayr/DBintro.html)上,参数的范围是-12至-15。测量了反式-β-硝基苯乙烯与某些烯胺的反应的二级速率常数,发现该常数与根据这项工作确定的亲电参数E和先前公布的烯胺的N和s N参数计算出的常数一致。