Copper-Catalyzed C(sp<sup>3</sup>)–OH Cleavage with Concomitant C–C Coupling: Synthesis of 3-Substituted Isoindolinones
作者:H. Surya Prakash Rao、A. Veera Bhadra Rao
DOI:10.1021/jo502446k
日期:2015.2.6
Copper(II) trifluoromethanesulfonate (Cu(OTf)2) efficiently catalyzes the C–C coupling of 3-hydoxyisoindolinones with a variety of aryl-, heteroaryl-, and alkenylboronic acids to furnish C(3) aryl-, heteroaryl-, and alkenyl-substituted isoindolinones. The coupling reactions work smoothly in 1,2-dicholoroethane (DCE) reflux, to effect both inter- and intramolecular versions. This is the first report
三氟甲磺酸铜(II)(Cu(OTf)2)有效催化3-羟基异吲哚满酮与各种芳基,杂芳基和烯基硼酸的CC偶联,提供C(3)芳基,杂芳基和烯基取代的异吲哚啉酮。偶联反应在1,2-二氯乙烷(DCE)回流中能顺利进行,从而影响分子间和分子内两种形式。这是有关C(sp 3)-OH裂解并伴随C-C偶联的第一个报告。光不稳定的2-硝基苄基保护基最适合于促进偶联反应和脱保护。生物碱神经胺的四环基序是通过应用新开发的铜催化的CC偶联制备的。