Synthesis of highly substituted 1,3-dienes, 1,3,5-trienes, and 3,6-disubstituted cyclohexenes by the palladium-catalyzed coupling of organic halides, internal alkynes or 1,3-cyclohexadienes, and organoboranes
作者:Xiaoxia Zhang、Richard C. Larock
DOI:10.1016/j.tet.2010.03.119
日期:2010.6
A number of highly substituted 1,3-dienes and 1,3,5-trienes have been stereoselectively prepared in moderate to good yields by the coupling of vinylic iodides, internal alkynes, and organoboranes in the presence of a palladium catalyst. Optimal reaction conditions for different organoboron substrates have been developed. The analogous three-component coupling of aryl halides, 1,3-cyclohexadiene, and
Simple and Efficient Generation of Aryl Radicals from Aryl Triflates: Synthesis of Aryl Boronates and Aryl Iodides at Room Temperature
作者:Wenbo Liu、Xiaobo Yang、Yang Gao、Chao-Jun Li
DOI:10.1021/jacs.7b03538
日期:2017.6.28
Despite the wide use of aryl radicals in organic synthesis, current methods to prepare them from aryl halides, carboxylic acids, boronic acids, and diazonium salts suffer from limitations. Aryl triflates, easily obtained from phenols, are promising aryl radical progenitors but remain elusive in this regard. Inspired by the single electron transfer process for aryl halides to access aryl radicals, we developed
Synthesis of Highly Substituted 1,3-Dienes and 1,3,5-Trienes by the Palladium-Catalyzed Coupling of Vinylic Halides, Internal Alkynes, and Organoboranes
作者:Xiaoxia Zhang、Richard C. Larock
DOI:10.1021/ol0348349
日期:2003.8.1
[reaction: see text] Highly substituted 1,3-dienes and trienes have been prepared in good to excellent yields by the palladium-catalyzed coupling of vinylic halides, internal alkynes, and organoboranes.
Synthesis of 2-vinylic dihydroindoles and tetrahydroquinolines via Pd-catalyzed cross-coupling of o-alkenyl anilides with vinylic halides and triflates
作者:Richard C. Larock、Hoseok Yang、Paola Pace、Sandro Cacchi、Giancarlo Fabrizi
DOI:10.1016/s0040-4039(98)00154-3
日期:1998.4
The palladium-catalyzed cross-coupling of o-vinylic and o-allylic anilides with vinylichalides and triflates produces 2-vinylic dihydroindoles and tetrahydroquinolines respectively in good to high yields.
Synthesis of nitrogen heterocycles via Pd-catalyzed cross-coupling of o-alkenyl anilides with vinylic halides and triflates
作者:Richard C. Larock、Paola Pace、Hoseok Yang、Charles E. Russell、Sandro Cacchi、Giancarlo Fabrizi
DOI:10.1016/s0040-4020(98)00589-4
日期:1998.8
The palladium-catalyzed cross-coupling of o-allylic and o-vinylic anilides with vinylic halides and triflates produces substituted nitrogen heterocycles in good to high yields by a process involving vinylpalladium addition to the olefin, rearrangement to a π-allylpalladium intermediate and subsequent intramolecular nucleophilic displacement of palladium. Different reactivity and regioselectivity in the