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Title
Japanese:Rhodium-catalyzed highly enantioselective [4 + 2] annulation of 2-alkynylbenzaldehydes with acyl phosphonates. 
English:Rhodium-catalyzed highly enantioselective [4 + 2] annulation of 2-alkynylbenzaldehydes with acyl phosphonates. 
Author
Japanese: Ken Tanaka, Rie Tanaka, Goushi Nishida, Keiichi Noguchi, Masao. Hirano.  
English: Ken Tanaka, Rie Tanaka, Goushi Nishida, Keiichi Noguchi, Masao. Hirano.  
Language English 
Journal/Book name
Japanese:Chemistry Letters 
English:Chemistry Letters 
Volume, Number, Page Vol. 37    No. 9    pp. 934-935
Published date 2008 
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.2008.934
Abstract A cationic rhodium(I)/(R)-Segphos [(4,4'-bi-1,3-benzodioxole)-5,5'-diylbis(diphenylphosphine)] complex catalyzes the highly enantioselective [4 + 2] annulation of 2-alkynylbenzaldehydes with acyl phosphonates, leading to benzopyranones with a phosphonate-substituted quaternary carbon center in moderate to high yields with excellent ee's. The crystal structure of one of the products was detd. [on SciFinder(R)]

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