Fluoronaphthalene Building Blocks via Arynes: A Solution to the Problem of Positional Selectivity
作者:Eric Masson、Manfred Schlosser
DOI:10.1002/ejoc.200500390
日期:2005.10
Diels-Alder reaction between suitably adorned arynes and similarly designed furans can open an entry to naphthalene derivs. that have unprecedented substituent patterns that qualify them as building blocks for pharmaceutical or agricultural research. The acid-catalyzed isomerization of model 1,4-epoxy-1,4-dihydronaphthalenes, the aryne/furan cycloadducts, exhibits unexpected effects on rates and regioselectivity
当在 2-(三甲基甲硅烷基)呋喃存在下生成 3-氟-和 3-氯-1,2-二氢苯时,会以 1:2 的比例形成两种区域异构环加合物。然而,区域选择性可以通过将一个庞大的三甲基甲硅烷基装入空间临界点来实现。两种反应组分各自的位置。因此,3-氟-6-三甲基甲硅烷基-1,2-二脱氢苯和2-(三甲基甲硅烷基)呋喃仅产生一种环加合物。通过这种方式,适当装饰的芳烃和类似设计的呋喃之间的 Diels-Alder 反应可以打开萘衍生物的入口。具有前所未有的取代模式,使它们成为制药或农业研究的基石。模型 1,4-环氧-1,4-二氢萘的酸催化异构化、芳烃/呋喃环加合物、对速率和区域选择性表现出意想不到的影响。[在 SciFinder (R) 上]