Electrophilic Aromatic Addition Reaction: Electrophilic Attack at an Aromatic H Substituent Position
作者:Han Young Choi、Ekaruth Srisook、Kun Sam Jang、Dae Yoon Chi
DOI:10.1021/jo048297x
日期:2005.2.1
We report and propose a mechanism for an unusual electrophilic aromatic addition reaction (AdEAr). During our preparation of 5,7-dibromo-8-methoxyquinaldine as a key intermediate in the synthesis of 7-bromoquinaldine-5,8-dione, direct bromination in either acidic or neutral conditions led only to the formation of 5-bromo-8-methoxyquinaldine. Under basic methanolic conditions, however, we unexpectedly
我们报告并提出了一种不寻常的亲电芳香加成反应(Ad E Ar)的机制。在我们制备5,7-二溴-8-甲氧基奎纳丁作为7-溴喹纳丁-5,8-二酮合成中的关键中间体期间,在酸性或中性条件下直接溴化仅导致形成5-bromo-8 -甲氧基奎纳丁。但是,在碱性甲醇条件下,我们意外地获得了5,7-二溴-8,8-二甲氧基-7,8-二氢喹哪啶加合物2a。该结果不仅允许芳族化合物通过加成加成物官能化,而且还引入了用于亲电取代反应的替代机理的可能性。