Red-Hair-Inspired Chromogenic System Based on a Proton-Switched Dehydrogenative Free-Radical Coupling

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• 作者：Loredana Leone ; Orlando Crescenzi ; Riccardo Amorati ; Luca Valgimigli ; Alessandra Napolitano ; Vincenzo Barone ; Marco d鈥橧schia
• 刊名：Organic Letters
• 出版年：2013
• 出版时间：October 4, 2013
• 年：2013
• 卷：15
• 期：19
• 页码：4944-4947
• 全文大小：285K
• 年卷期：v.15,no.19(October 4, 2013)
• ISSN：1523-7052

文摘

In the presence of micromolar peroxides or biometals (Fe(III), Cu(II), V(V) salts), and following a strong acid input, the stable 3-phenyl-2H-1,4-benzothiazine is efficiently converted to a green-blue 螖^{2,2鈥?/sup>-bi(2H-1,4-benzothiazine) chromophore via dehydrogenative coupling of a 1,4-benzothiazinyl radical. The new system is of potential practical interest for colorimetric peroxide and redox biometal detection.}