Pd-Catalyzed Autotandem C–C/C–C Bond-Forming Reactions with Tosylhydrazones: Synthesis of Spirocycles with Extended π-Conjugation
作者:Raquel Barroso、Rocío A. Valencia、María-Paz Cabal、Carlos Valdés
DOI:10.1021/ol500778u
日期:2014.4.18
A new Pd-catalyzed autotandem process is presented by the reaction of tosylhydrazones of cyclic ketones and 2,2′-dibromobiphenyls and related systems. The process involves cross-coupling with tosylhydrazone followed by an intramolecular Heck reaction and gives rise to spirocyclic structures. Noteworthy, two C–CAr bonds are formed on the hydrazonic carbon during the process. Depending on the starting