Sequential Pd- and Rh-catalyzed three-component cyclization with allenylboronate platform |
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| Authors: | Tonogaki Keisuke Itami Kenichiro Yoshida Jun-Ichi |
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| Institution: | Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan. |
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| Abstract: | reaction: see text] A novel three-component cyclization using allenylboronate ester is described. A three-component assembly of allenylboronate ester, aryl iodides, and stabilized carbon nucleophiles took place in the presence of palladium catalyst, furnishing functionalized alkenylboronate esters with high regio- and stereoselectivity. A Rh-catalyzed cyclization of the resultant three-component products then afforded interesting carbocyclic frameworks efficiently. |
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