CuI-catalyzed suzuki-miyaura and sonogashira cross-coupling reactions using DABCO as ligand |
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Authors: | Li Jin-Heng Li Ji-Lan Wang De-Ping Pi Shao-Feng Xie Ye-Xiang Zhang Man-Bo Hu Xi-Chao |
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Institution: | Key Laboratory of Chemical Biology & Traditional Chinese Medicine Research (Ministry of Education), College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha 410081, China. jhli@hunnu.edu.cn |
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Abstract: | In the presence of TBAB, CuI-catalyzed Suzuki-Miyaura cross-coupling of vinyl halides and aryl halides with arylboronic acids was conducted smoothly to afford the corresponding diarylethenes and polyaryls in moderate to good yields using DABCO (1,4-diazabicyclo2.2.2]octane) as the ligand. We also found that the inexpensive CuI/DABCO catalytic system was effective for Sonogashira cross-couplings of aryl halides and vinyl halides. A variety of aryl halides and vinyl halides including activated aryl chlorides underwent the coupling with terminal alkynes in moderate to excellent yields. |
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