Acid-Free Synthesis of Carbazoles and Carbazolequinones by Intramolecular Pd-Catalyzed, Microwave-Assisted Oxidative Biaryl Coupling Reactions - Efficient Syntheses of Murrayafoline A, 2-Methoxy-3-methylcarbazole, and Glycozolidine
作者:Vellaisamy Sridharan、M. Antonia Martín、J. Carlos Menéndez
DOI:10.1002/ejoc.200900537
日期:2009.9
A mild and efficient methodology for the synthesis of oxygenated carbazoles from diarylamines under non-acidic conditions was developed, based on a palladium-catalyzed, microwave-assisted double C–H bond activation process. This new protocol was successfully applied to the synthesis of three naturally occurring carbazoles, namely murrayafoline A, 2-methoxy-3-methylcarbazole, and glycozolidine. The
基于钯催化的微波辅助双 C-H 键活化过程,开发了一种在非酸性条件下由二芳基胺合成氧化咔唑的温和有效的方法。这一新协议已成功应用于三种天然咔唑的合成,即 murrayafoline A、2-甲氧基-3-甲基咔唑和糖唑烷。反应范围也扩大到包括苯并稠合咔唑醌的合成。 (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)