A palladium-catalyzed intramolecular carbonylative annulation reaction for the synthesis of 4,5-fused tricyclic 2-quinolones
作者:Xiwu Zhang、Haichao Liu、Yanxing Jia
DOI:10.1039/c6cc02600a
日期:——
A concise and efficient synthetic route to 4,5-fused tricyclic 2-quinolones through a palladium-catalyzed carbonylative annulation of alkyne-tethered N-substituted o-iodoanilines has been developed. This reaction proceeds smoothly under mild reaction conditions...
Gold and Palladium Combined for the Sonogashira Coupling of Aryl and Heteroaryl Halides
作者:Tarun Sarkar、Biswajit Panda
DOI:10.1055/s-0032-1318119
日期:——
transmetalation step. A highly efficient gold and palladium combined methodology for the Sonogashiracoupling of a wide array of electronically and structurally diverse aryl and heteroaryl halides is described. The orthogonal reactivity of the two metals shows high selectivity and extreme functional group tolerance in Sonogashiracoupling. A brief mechanistic study reveals that the gold acetylide intermediate enters
Synthesis of Polycyclic Compounds by a Cascade Cycloisomerisation/Diels-Alder Reaction
作者:José Barluenga、Jonás Calleja、Abraham Mendoza、Félix Rodríguez、Francisco J. Fañanás
DOI:10.1002/chem.201000515
日期:2010.6.25
Running rings around gold: A new cascade reactioncatalysed by AuCl3 that is based upon an initial cycloisomerisation reaction of enynol or enynamine derivatives, which form 1,3‐butadiene derivatives, followed by a Diels–Alder cycloaddition reaction to give fused or spirocyclic compounds is reported (see scheme).