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Title: Nickel-catalyzed cycloaddition of alkynes and isocyanates. Author: Duong HA, Cross MJ, Louie J. Journal: J Am Chem Soc; 2004 Sep 22; 126(37):11438-9. PubMed ID: 15366880. Abstract: A mild and general route for preparing 2-pyridones from isocyanates and diynes is described. Ni imidazolyidene complexes were used to mediate cyclizations between both internal and terminal diynes with aryl and alkyl isocyanates. In addition, the efficacy of this protocol allows for the preparation of a fused seven-membered pyridone and for three component cyclizations.[Abstract] [Full Text] [Related] [New Search]