Thermal [2+ 2] Cycloaddition of Allenynes: Easy Construction of Bicyclo [6.2. 0] deca-1, 8-dienes, Bicyclo [5.2. 0] nona-1, 7-dienes, and Bicyclo [4.2. 0] octa-1, 6-dienes

…, Y Hara, Y Miyashita, F Inagaki

Index: Mukai, Chisato; Hara, Yasuyuki; Miyashita, Yusuke; Inagaki, Fuyuhiko Journal of Organic Chemistry, 2007 , vol. 72, # 12 p. 4454 - 4461

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Citation Number: 42

Abstract

The simple refluxing of allenynes, having a phenylsulfonyl functionality on the allenyl group, in xylene (or mesitylene) without microwave irradiation resulted in the efficient formation of bicyclo [5.2. 0] nona-1, 7-dienes and bicyclo [4.2. 0] octa-1, 6-dienes in high yields. This method was shown to be successfully applicable to the first construction of bicyclo [6.2. 0] deca-1, 8-dienes. Construction of the corresponding oxa-and azabicyclo [m. 2.0] ...