An Improved Palladium-Catalyzed Conversion of Aryl and Vinyl Triflates to Bromides and Chlorides
作者:Jun Pan、Xinyan Wang、Yong Zhang、Stephen L. Buchwald
DOI:10.1021/ol202098h
日期:2011.9.16
A facile Pd-catalyzed conversion of aryl and vinyl triflates to aryl and vinyl halides (bromides and chlorides) is described. This method allows convenient access to a variety of aryl, heteroaryl, and vinyl halides in good to excellent yields and with greatly simplified conditions relative to our previous report.
Palladium-Catalyzed Conversion of Aryl and Vinyl Triflates to Bromides and Chlorides
作者:Xiaoqiang Shen、Alan M. Hyde、Stephen L. Buchwald
DOI:10.1021/ja107481a
日期:2010.10.13
The palladium-catalyzed conversion of aryl and vinyltriflates to aryl and vinyl halides (bromides and chlorides) has been developed using dialkylbiaryl phosphine ligands. A variety of aryl, heteroaryl, and vinyl halides can be prepared via this method in good to excellent yields.
作者:Yike Zou、Jason E. Melvin、Stephen S. Gonzales、Matthew J. Spafford、Amos B. Smith
DOI:10.1021/jacs.5b04728
日期:2015.6.10
A convergent total synthesis of the architecturally complex indole diterpenoid (-)-nodulisporic acidD has been achieved. Key synthetic transformations include vicinal difunctionalization of an advanced α,β-unsaturated aldehyde to form the E,F-trans-fused 5,6-ring system of the eastern hemisphere and a cascade cross-coupling/indolization protocol leading to the CDE multisubstituted indole core.
结构复杂的吲哚二萜 (-)-nodulisporic 酸 D 的收敛全合成已经实现。关键的合成转化包括先进的 α,β-不饱和醛的邻位双官能化以形成东半球的 E,F-反式融合 5,6-环系统和导致 CDE 多取代吲哚的级联交叉偶联/吲哚化方案核。
Ruthenium-Catalyzed Transformation of Aryl and Alkenyl Triflates to Halides
Aryl triflates were transformed to aryl bromides/iodides simply by treating them with LiBr/NaI and [Cp*Ru(MeCN)(3)]OTf. The ruthenium complex also catalyzed the transformation of alkenyl sulfonates and phosphates to alkenyl halides under mild conditions. Aryl and alkenyl triflates undergo oxidative addition to a ruthenium(II) complex to form eta(1)-arylruthenium and 1-ruthenacyclopropene intermediates, respectively, which are transformed to the corresponding halides.