Exclusiveβ-Substitution in the Reaction of Octafluoronaphthalene with Secondary Amines
作者:Vladimir I. Sorokin、Valery A. Ozeryanskii、Alexander F. Pozharskii
DOI:10.1002/ejoc.200300570
日期:2004.2
The reaction between octafluoronaphthalene and dimethylamine, pyrrolidine or piperidine in DMF, dimethyl(ethylene)urea (DMEU) or without solvent leads to the exclusive substitution of β-fluorine atoms giving naphthalene derivatives with four NR2 groups. This was proved by 19F NMR of the products and a crystal structure determination for 1,4,5,8-tetrafluoro-2,3,6,7-tetrakis(piperidin-1-yl)naphthalene
八氟萘与二甲胺、吡咯烷或哌啶在 DMF、二甲基(亚乙基)脲 (DMEU) 或无溶剂中的反应导致 β-氟原子的排他取代,产生具有四个 NR2 基团的萘衍生物。这通过产物的 19F NMR 和 1,4,5,8-四氟-2,3,6,7-四(哌啶-1-基)萘的晶体结构测定得到证实。DMF 反应的主要特征是转酰胺化过程。合成的四胺中剩余的四个氟原子可以被 LiAlH4 顺利还原。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2004)