Unprecedented Radical−Radical Reaction of a [2.2]Paracyclophane Derivative Containing an Imidazolyl Radical Moiety

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• 作者：Sayaka Hatano ; Ken Sakai ; Jiro Abe
• 刊名：Organic Letters
• 出版年：2010
• 出版时间：September 17, 2010
• 年：2010
• 卷：12
• 期：18
• 页码：4152-4155
• 全文大小：184K
• 年卷期：v.12,no.18(September 17, 2010)
• ISSN：1523-7052

文摘

Pseudogem-DPIM-DPI[2.2]PC dimer (3), with a C−N bond between the [2.2]paracyclophane ([2.2]PC) moiety and the imidazole ring, was synthesized. This is the first crystallographic observation of a highly sterically constrained 1-ene-2,5-cyclohexadiene structure for a [2.2]PC derivative. Compound 3 shows a photochromic behavior, exhibiting a color change from pale yellow to green upon either UV or visible light irradiation, both in the solid state and in solution at room temperature.