作者:Xiang Li、Bo Zhou、Run-Ze Yang、Fu-Ming Yang、Ren-Xiao Liang、Ren-Rong Liu、Yi-Xia Jia
DOI:10.1021/jacs.8b09186
日期:2018.10.24
Enantioselective intramolecular dearomative Heck reactions have been developed by Pd-catalyzed cross-coupling of aryl halides or aryl triflates with the internal C═C bond of indoles, benzofurans, pyrroles, and furans. A variety of structurally unique spiroheterocycles and benzofused heterocycles having N/O-substituted quaternary carbon stereocenters, and exocyclic olefin moieties were afforded in moderate
对映选择性分子内脱芳基 Heck 反应是通过 Pd 催化的芳基卤化物或芳基三氟甲磺酸酯与吲哚、苯并呋喃、吡咯和呋喃的内部 C=C 键的交叉偶联开发的。各种结构独特的螺杂环和具有 N/O 取代的季碳立体中心和环外烯烃部分的苯并杂环以中等至优异的产率提供,具有良好至优异的对映选择性,显示了本协议的广泛范围。合成了一系列新的基于 BINOL 和 H8-BINOL 的亚磷酰胺配体,并证明在 C2 系底物形成螺杂环的反应中是有效的手性配体。(S)-SEGPHOS 被证明是用于传递苯并稠合二氢吲哚和吡咯啉的反应的良好配体。