Aluminium Chloride-Catalyzed Intermolecular<i>vs</i>Intramolecular Friedel-Crafts Reaction of Acrylanilides and 3-Chloropropanamides
作者:I-Li Chen、Tai-Chi Wang、Yeh-Long Chen、Cherng-Chyi Tzeng
DOI:10.1002/jccs.200000018
日期:2000.2
3-Phenylpropionanilide (4a) is obtained in a yield of 89% from acrylanilide by the treatment with AlCl3/benzene, compared with a yield of 39% by the 1,4-conjugate addition of phenyllithium. The formation of 4a indicated that an intermolecular Friedel-Crafts reaction occurred, rather than the relatively more facile intramolecular ring cyclization, and provided a more efficient route than a conjugate
3-苯基丙酰苯胺 (4a) 通过用 AlCl3/苯处理由丙烯酰苯胺获得 89% 的产率,而通过 1,4-共轭添加苯基锂获得的产率为 39%。4a的形成表明发生了分子间Friedel-Crafts反应,而不是相对更容易的分子内环环化,并且为制备3-苯基丙酰苯胺及其衍生物提供了比苯基锂共轭加成更有效的途径。虽然甲氧基是亲核取代的活化剂,但在 N-苯基处引入甲氧基取代基并没有增加分子内环化的竞争能力,因为 AlCl3 催化去甲基化形成 ArOAlCl2 配合物,降低了 π- N-苯基芳香体系中的电子。