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Title
Japanese:Cationic Rhodium(I)/H8-binap Complex Catalyzed [2+2+2] Cycloadditions of 1,6- and 1,7-Diynes with Carbonyl Compounds. 
English:Cationic Rhodium(I)/H8-binap Complex Catalyzed [2+2+2] Cycloadditions of 1,6- and 1,7-Diynes with Carbonyl Compounds. 
Author
Japanese: Yousuke Otake, Rie Tanaka, Ken. Tanaka.  
English: Yousuke Otake, Rie Tanaka, Ken. Tanaka.  
Language English 
Journal/Book name
Japanese:European Journal of Organic Chemistry 
English:European Journal of Organic Chemistry 
Volume, Number, Page     No. 17    pp. 2737-2747
Published date 2009 
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.200900185
Abstract We have established that a cationic rhodium(I)/H8-binap complex catalyzes [2+2+2] cycloaddns. of a variety of 1,6- and 1,7-diynes with both electron-deficient and electron-rich carbonyl compds., leading to dienones in high yield under mild reaction conditions. In the reactions with acyl phosphonates, the reactivity of 1,6- and 1,7-diynes was highly dependent on their own structures. The addn. of chelating di-Et oxalate effectively promoted the [2+2+2] cycloaddns. involving acyl phosphonates, presumably due to the equil. formation of the desired 1:1 rhodium complex of the diyne and the acyl phosphonate by facile ligand exchange between the diyne and weakly coordinated di-Et oxalate. In the reactions involving bifunctional carbonyl compds. or unsym. 1,6-diynes, high chemo- or regioselectivities were obsd.(ﾂｩ Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009). [on SciFinder(R)]

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