Synthesis of 4,6-Dichloro- and 4,6-Difluorophthalides: a Systematic Study on the Lithiation of 3,5-Dihalo-N,N-diisopropylbenzamides
作者:Balázs Molnár、Gyula Simig、Balázs Volk
DOI:10.1002/ejoc.201001529
日期:2011.3
By taking advantage of the N,N-diisopropylcarbamoyl moiety as a versatile ortho-directing lithiation group, the preparation of 4,6-dichloro- and 4,6-difluorophthalides, starting from the corresponding 3,5-dihalo-N,N-diisopropylbenz-amides, is described here. The role of the lithiating agent, the formation of kinetically and thermodynamically favored products, and the marked difference between the dichloro
通过利用 N,N-二异丙基氨基甲酰基部分作为通用的邻位导向锂化基团,从相应的 3,5-二卤代-N,N- 开始制备 4,6-二氯-和 4,6-二氟苯酞此处描述了二异丙基苯甲酰胺。详细讨论了锂化剂的作用、动力学和热力学有利产物的形成以及二氯和二氟衍生物之间的显着差异。