作者:Soo-Dong Yoh、Duk-Young Cheong、Oh-Seuk Lee
DOI:10.1002/poc.574
日期:2003.1
|ρYZ | >|ρXY | >|ρXZ |, predicts that these Menschutkin-type reactions are dissociative SN2 reactions. In particular, the reaction of strongly activated benzyl derivatives with tertiary amines in acetonitrile reveals a more advanced bond breaking like SN1 reactions. The predicted mechanism for the benzylation of pyridines with benzylic systems is evident from More O'Ferrall–Jencks diagram and the semi-empirical
在35°C的乙腈中研究了取代的(Z)-苄基(X)-苯磺酸盐与取代的(Y)-吡啶的季铵化反应。哈米特反应常数的幅度ρ X,ρ ÿ和ρ Ž指示更强的亲核试剂的引线在较小的程度键断裂的。另外,较好的离去基团伴随着较少程度的键形成。多哈密特相互作用的应用,| ρ YZ | > | ρ XY | > | ρ XZ |,预测,这些Menschutkin型反应是离解性小号Ñ2反应。特别是,在乙腈叔胺强烈活化的苄基衍生物的反应揭示了一种更先进的键断裂等小号ñ 1反应。从More O'Ferrall-Jencks图和使用AM1方法进行的半经验MO计算,可以明显看出吡啶被苄基系统苄基化的预测机理。版权所有©2002 John Wiley&Sons,Ltd.