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Title
Japanese:Gold-Catalyzed Enantioselective Intramolecular Annulation of Ene-Yne-Carbonyls via Benzopyrylium-Type Intermediates. 
English:Gold-Catalyzed Enantioselective Intramolecular Annulation of Ene-Yne-Carbonyls via Benzopyrylium-Type Intermediates. 
Author
Japanese: 越川 拓海, 佐藤 昌和, 益富 光児, 柴田 祐, 田中 健.  
English: Takumi Koshikawa, Masakazu Satoh, Koji Masutomi, Yu Shibata, Ken. Tanaka.  
Language English 
Journal/Book name
Japanese:European Journal of Organic Chemistry 
English:European Journal of Organic Chemistry 
Volume, Number, Page         pp. Ahead of Print
Published date Nov. 28, 2018 
Publisher
Japanese:Wiley-VCH Verlag GmbH & Co. KGaA 
English:Wiley-VCH Verlag GmbH & Co. KGaA 
Conference name
Japanese: 
English: 
Conference site
Japanese: 
English: 
DOI https://doi.org/10.1002/ejoc.201801537
Abstract A cationic gold(I)/(R)-H8-binap complex catalyzes the enantioselective intramol. [4+2] annulation of benzene-linked ene-yne-carbonyls via benzopyrylium-type intermediates at room temp. to give chiral tricyclic compds., bearing two stereogenic centers, as single diastereomers with moderate ee values. The reactions of sterically demanding naphthalene-linked ene-yne-carbonyls with the same gold(I) catalyst gave not only [4+2] annulation products but also [3+2] annulation products as minor products with good ee values. [on SciFinder(R)]

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