Development of the Suzuki−Miyaura Cross-Coupling Reaction: Use of Air-Stable Potassium Alkynyltrifluoroborates in Aryl Alkynylations
作者:Gary A. Molander、Bryson W. Katona、Fouzia Machrouhi
DOI:10.1021/jo0262356
日期:2002.11.1
cross-coupling reaction of potassiumalkynyltrifluoroborates with aryl halides or triflates proceeds readily with moderate to excellent yields. The potassiumalkynyltrifluoroborates are air- and moisture-stable crystalline solids that can be stored indefinitely, which will provide an advantage in applications to combinatorial chemistry. The alkynyl cross-coupling reaction can be effected using 9 mol % of PdCl2(dppf)
Efficient coupling reactions of lithium alkynyl(triisopropoxy)borates with aryl halides: application to the antifungal terbinafine synthesis
作者:Chang Ho Oh、Seung Hyun Jung
DOI:10.1016/s0040-4039(00)01543-4
日期:2000.10
Thermally stable lithiumalkynyl(triisopropoxy)borates were reacted with several aryl halides in the presence of palladium catalysts to give the corresponding cross-coupling products in excellent yields. The present methodology has been successfully applied to the antifungal terbinafine synthesis.
Controlled Single and Double Iodofluorination of Alkynes with DIH- and HF-Based Reagents
作者:Lukas Pfeifer、Véronique Gouverneur
DOI:10.1021/acs.orglett.8b00321
日期:2018.3.16
terminal alkynes using 1,3-diiodo-5,5,-dimethylhydantoin and HF-based reagents is disclosed. This approach is used to prepare a fluorinated tamoxifen derivative in two steps from commercially available starting materials. A facile method enabling controlled regioselective double iodofluorination of terminal alkynes is also presented.
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
Rhodium(III)-Catalyzed Redox-Neutral CH Annulation of Arylnitrones and Alkynes for the Synthesis of Indole Derivatives
作者:Zhi Zhou、Guixia Liu、Yan Chen、Xiyan Lu
DOI:10.1002/adsc.201500580
日期:2015.9.14
By using a nitrone as the oxidizingdirectinggroup, a mild, practical and efficient rhodium(III)‐catalyzed CH functionalization for the synthesis of indole derivatives has been developed. This reaction obviates the need for an external oxidant and shows good functional group tolerance. The employment of a sterically hindered Mes group on the carbon center of the nitrone is crucial to produce indoles