Competition Studies in Alkyne Electrophilic Cyclization Reactions
作者:Saurabh Mehta、Jesse P. Waldo、Richard C. Larock
DOI:10.1021/jo802196r
日期:2009.2.6
toward alkyneelectrophiliccyclizationreactions has been studied. The required diarylalkynes have been prepared by consecutive Sonogashira reactions of appropriately substituted aryl halides and competitive cyclizations have been performed using I2, ICl, NBS and PhSeCl as electrophiles. The results indicate that the nucleophilicity of the competing functional groups, polarization of the alkyne triple
已经研究了各种官能团对炔烃亲电环化反应的相对反应性。所需的二芳基炔已通过适当取代的芳基卤化物的连续 Sonogashira 反应制备,并使用 I 2、ICl、NBS 和 PhSeCl 作为亲电子试剂进行竞争性环化。结果表明,竞争官能团的亲核性、炔烃三键的极化和中间体的阳离子性质是决定这些反应结果的最重要因素。