Cobalt-Mediated Macrocyclizations. Facile Synthesis of 2-Oxo Pyridinophanes via [2 + 2 + 2] Cycloaddition of α,ω-Diynes and Isocyanates
摘要:
Cobalt-mediated [2 + 2 + 2] cycloaddition of alpha,omega-diynes and isocyanates provides a direct approach to macrocyclic 2-oxopyridinophanes. This macrocyclization process, which proceeded most efficiently with aliphatic isocyanates, was conveniently performed at a moderate temperature (85degreesC) without irradiation or syringe-pump addition.
Cobalt-Mediated Macrocyclizations. Facile Synthesis of 2-Oxo Pyridinophanes via [2 + 2 + 2] Cycloaddition of α,ω-Diynes and Isocyanates
作者:Llorente V. R. Boñaga、Han-Cheng Zhang、Diane A. Gauthier、Indrasena Reddy、Bruce E. Maryanoff
DOI:10.1021/ol030096c
日期:2003.11.1
Cobalt-mediated [2 + 2 + 2] cycloaddition of alpha,omega-diynes and isocyanates provides a direct approach to macrocyclic 2-oxopyridinophanes. This macrocyclization process, which proceeded most efficiently with aliphatic isocyanates, was conveniently performed at a moderate temperature (85degreesC) without irradiation or syringe-pump addition.