作者:Laura J. Marshall、Karl M. Cable、Nigel P. Botting
DOI:10.1002/jlcr.1788
日期:——
A fast and efficient synthesis of [2-13C]phloroglucinol in six steps from acyclic, non-aromatic precursors is presented, with regioselective placement of a 13C-atom in the aromatic ring. The 13C-label was introduced by reaction of [13C]methyl iodide with methyl 4-chloroformyl butyrate. Cyclization via an intramolecular Claisen condensation, followed by aromatization gave [2-13C]resorcinol. Following subsequent methylation of the hydroxyl groups, the third hydroxyl group was introduced using an iridium-catalysed C–H activation/borylation/oxidation procedure. Demethylation then yielded the desired [2-13C]phloroglucinol. Copyright © 2010 John Wiley & Sons, Ltd.
提出了一种由无环、非芳香族前体通过六步快速有效合成[2-13C]间苯三酚的方法,并在芳香环中区域选择性地放置13C原子。 13C-标记是通过[13C]甲基碘与4-氯甲酰丁酸甲酯反应引入的。通过分子内克莱森缩合环化,然后芳构化得到[2-13C]间苯二酚。随后羟基甲基化,使用铱催化的 C-H 活化/硼化/氧化程序引入第三个羟基。然后去甲基化产生所需的[2-13C]间苯三酚。版权所有 © 2010 约翰威利父子有限公司