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Title
Japanese:A new route to tricyclic 2-pyridone frameworks via formation of bicyclic N-alkenyl alkynylamides followed by gold-catalyzed cycloisomerization. 
English:A new route to tricyclic 2-pyridone frameworks via formation of bicyclic N-alkenyl alkynylamides followed by gold-catalyzed cycloisomerization. 
Author
Japanese: Hidetomo Imase, Ken. Tanaka.  
English: Hidetomo Imase, Ken. Tanaka.  
Language English 
Journal/Book name
Japanese:Chemistry Letters 
English:Chemistry Letters 
Volume, Number, Page Vol. 38    No. 12    pp. 1152-1153
Published date 2009 
Publisher
Japanese:Chemical Society of Japan 
English:Chemical Society of Japan 
Conference name
Japanese: 
English: 
Conference site
Japanese: 
English: 
DOI https://doi.org/10.1246/cl.2009.1152
Abstract A cationic gold(I)/PPh3 complex catalyzes cycloisomerizations of bicyclic N-alkenyl alkynylamides leading to tricyclic 2-pyridone derivs. at room temp. in good yields. The bicyclic N-alkenyl alkynylamides are readily prepd. starting from com. available 2-substituted cycloalkanones. E.g., reaction of 2-phenylcyclohexanone with 1-bromo-3-chloropropane, followed by NaN3, PPh3, and phenylpropiolic acid gave 45% bicyclic N-alkenyl alkynylamide I. Cycloisomerization of the latter in presence of AuCl(PPh3)3/AgBF4 gave 64% tricyclic 2-pyridone deriv. II. [on SciFinder(R)]

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