Palladium on carbon-catalyzed synthesis of 2- and 2,3-substituted indoles under heterogeneous conditions
作者:Yasunari Monguchi、Shigeki Mori、Satoka Aoyagi、Azusa Tsutsui、Tomohiro Maegawa、Hironao Sajiki
DOI:10.1039/c004939e
日期:——
A mild, efficient and LiCl-free synthetic method for indole derivatives based on the heteroannulation of alkynes with 2-iodoanilines was achieved using palladium on carbon (Pd/C) and NaOAc in heated NMP. The N-tosyl protection of 2-iodoaniline expedited the reaction progress, while other protecting groups, such as tert-butoxycarbonyl, acetyl, and benzyloxycarbonyl groups, underwent deprotection under
一种温和,高效且不含LiCl的合成方法 吲哚 基于炔烃与2-碘苯胺杂环化的衍生物是使用 钯 在 碳 (钯/C) 和 醋酸钠 在加热 NMP。这N-甲苯磺酰基 保护 2-碘苯胺加快了反应的进程,而其他保护基团,例如叔丁氧羰基,乙酰基和苄氧羰基,在当前条件下进行了脱保护。各种二和单取代的炔烃可以有效地与N-甲苯磺酰基-2-碘苯胺 使相应的吲哚获得高到高的收率。