[2+2+2]-Cyclotrimerization reactions often suffer from low reaction rates and low chemoselectivity. We are reporting a solution to both problems through the use of open-vessel conditions for microwave-mediated cyclotrimerization reactions. [2+2+2] cyclotrimerization - alkynes - microwave - bicyclic compounds - transition metal catalysis
Microwave-Mediated Nickel-Catalyzed Cyclotrimerization Reactions: Total Synthesis of Illudinine
作者:Jesse A. Teske、Alexander Deiters
DOI:10.1021/jo7020955
日期:2008.1.1
[GRAPHICS]Rapid and efficient [2 + 2 + 2] cyclotrimerization reactions were discovered through the application of microwave irradiation in conjunction with a Ni(CO)(2)(PPh3)(2) catalyst. This enables the facile construction of highly substituted indane, isoindoline, and tetraline core structures. The developed microwave-mediated Ni-catalyzed cyclotrimerization reaction was employed as the key step in a concise synthesis of the isoquinoline natural product illudinine. This represents the first example of a Ni-catalyzed cyclotrimerization reaction in total synthesis.