Li, Wen-Tai Lai, Fang-Chun Lee, Gene-Hsian Peng, Shie-Ming Liu, Rai-Shung Synthesis of Furopyridines via Cycloaddition of Unactivated Nitriles with Tungsten-Substituted 1,3-Diene Synthesis of Furopyridines via Cycloaddition of Unactivated Nitriles with Tungsten-Substituted 1,3-Diene Diene;Furopyridine;Unactivated Nitriles;Cycloaddition;Synthesi 1998-04-28
    https://acs.figshare.com/articles/journal_contribution/Synthesis_of_Furopyridines_via_Cycloaddition_of_Unactivated_Nitriles_with_Tungsten-Substituted_1_3-Diene/3668487
10.1021/ja973915v.s001