Reactivity of Arenesulfinic Acids as Nucleophiles in the Addition Reaction to 2-Haloacrylonitriles
作者:D. Zvezdova、S. Stoeva、D. Aleksiev
DOI:10.1002/jccs.200700062
日期:2007.4
concerning the reaction centers were calculated. For the interaction with benzenesulfinic acids, 2-bromoacrylonitrile was found to have higher reactivity as a Michael acceptor than 2-chloroacrylonitrile. The higher reactivity of 2-bromoacrylonitrile is associated with the higher electrophilicity of its β-carbon atom, which was proved by its pronounced acceptor delocalizability and increased reaction rate values
研究了未取代和对位取代苯亚磺酸与 2-氯代和 2-溴代丙烯腈的亲核加成反应。如此获得的3-苯磺酰基-2-卤代丙腈的结构通过微量分析和光谱方法得到证实。确定了反应的基本动力学参数,并计算了一些与反应中心有关的局部电子描述符。对于与苯亚磺酸的相互作用,发现 2-溴丙烯腈作为迈克尔受体具有比 2-氯丙烯腈更高的反应性。2-溴丙烯腈的较高反应性与其β-碳原子的较高亲电性有关,这可以通过其显着的受体离域性和与相应苯亚磺酸的反应速率值增加来证明。