作者:Santiago Barroso、Sébastien Lemaire、Vittorio Farina、Andreas K. Steib、Romain Blanc、Paul Knochel
DOI:10.1021/acs.joc.6b00074
日期:2016.4.1
of arylzinc reagents bearing electron-donating substituents to react in a Friedel–Crafts fashion (cine) with electrophiles like perpivaloylated glucoside bromide and benzhydryl bromides in competition with organometallic coupling (ipso) is shown. The stereoelectronic factors required to promote the cine reactivity versus the classical ipso, and the mechanism of this alternative pathway, have been investigated
显示了带有给电子取代基的芳基锌试剂以弗里德-克来夫特方式(电影)与亲电试剂(如全金属酰化的葡糖苷溴化物和苯甲基溴化物)与有机金属偶联剂(ipso)竞争的反应能力。已经研究了与经典ipso相比提高电影反应性所需的立体电子因素,以及这种替代途径的机制。Wheland中间体在分子内以1,2-位移去质子化,但在更远距离的位移下,在这种情况下C-Zn未被修饰。在后一种情况下,可以利用此结果进行进一步的功能化。