Efficient synthesis of biscarbazoles by palladium-catalyzed twofold C–N coupling and C–H activation reactions
作者:Tran Quang Hung、Ngo Ngoc Thang、Do Huy Hoang、Tuan Thanh Dang、Alexander Villinger、Peter Langer
DOI:10.1039/c3ob41746h
日期:——
A new and efficient strategy for the synthesis of 3,9â²- and 2,9â²-biscarbazoles was developed. Our strategy relies on the cyclization of 1,1â²-biphenyl-2,2â²-diyl bis(trifluoromethanesulfonate) with 4- or 3-anisidine, transformation of the methoxy to a triflate group and subsequent oxidative Pd-catalyzed cyclization with various anilines.
我们开发出了一种合成 3,9â²-和 2,9â²-异咔唑的高效新策略。我们的策略依赖于 1,1â²-联苯-2,2â²-二基双(三氟甲磺酸)与 4- 或 3-甲氧基苯胺的环化反应,甲氧基转变为三late 基团,然后在氧化钯催化下与各种苯胺发生环化反应。