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Title
Japanese:Rhodium-Catalyzed [2+2+2] Cycloaddition of Diynes with Carbodiimides and Carbon Dioxide under Ambient Conditions. 
English:Rhodium-Catalyzed [2+2+2] Cycloaddition of Diynes with Carbodiimides and Carbon Dioxide under Ambient Conditions. 
Author
Japanese: Masahiro Ishii, Fumiya Mori, Ken. Tanaka.  
English: Masahiro Ishii, Fumiya Mori, Ken. Tanaka.  
Language English 
Journal/Book name
Japanese:Chemistry - A European Journal 
English:Chemistry - A European Journal 
Volume, Number, Page Vol. 20    No. 8    pp. 2169-2174
Published date 2014 
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/chem.201304623
Abstract It was established that a cationic rhodium(I)/H8-BINAP complex is able to catalyze a [2+2+2] cycloaddn. of diynes with carbodiimides and carbon dioxide under ambient conditions. Enantioselective variants and regioselective variants of these reactions are also disclosed. Under optimized conditions the synthesis of the target compds. was achieved using N,N'-[(methane)tetrayl]bis[4-methylbenzenamine], N,N'-[(methane)tetrayl]bis[cyclohexanamine] (i.e., dicyclohexylcarbodiimide) and diynes, such as 2,2-bis(2-propynyl)propanedioic acid esters, 4-methyl-N,N-bis(2-propynyl)benzenesulfonamide. 3,3-bis(2-butynyl)-2,4-pentanedione as starting materials, bis[(1,2,5,6-ﾎｷ)-1,5-cyclooctadiene]rhodium tetrafluoroborate(1-) as a catalyst and 1,1'-(5,5',6,6',7,7',8,8'-octahydro[1,1'-binaphthalene]-2,2'-diyl)bis[1,1-diphenylphosphine] (H8-BINAP) as a ligand. [on SciFinder(R)]

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