Cationic rhodium(I)/segphos-catalyzed cycloisomerization of 1,6- and 1,7-diynes in the presence of 1,2-cyclohexanedione |
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| Authors: | Tanaka Ken Otake Yousuke Hirano Masao |
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| Affiliation: | Department of Applied Chemistry, Graduate School of Engineering, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588, Japan. tanaka-k@cc.tuat.ac.jp |
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| Abstract: | We have developed the first catalytic cycloisomerization of 1,6- and 1,7-diynes leading to trienes and vinylpyrroles by using a cationic rhodium(I)/Segphos complex (2.5-10 mol %) and 1,2-cyclohexanedione (100 mol %). 1,2-Cyclohexanedione may effectively occupy vacant coordination sites and thus promote the present cycloisomerization. |
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