Synthesis of B-trisubstituted borazines via the rhodium-catalyzed hydroboration of alkenes with N,N′,N″-trimethyl or N,N′,N″-triethylborazine |
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| Authors: | Yasunori Yamamoto Kazuo Miyamoto Yasutaka Nakatani Norio Miyaura |
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| Affiliation: | a Division of Chemical Process Engineering, Graduate School of Engineering, Hokkaido University, Kita 13, Nishi 8, Kita-ku, Sapporo, Hokkaido 060-8628, Japan
b Nippon Shokubai, 5-8, Nishi Otabi-cho, Suita, Osaka 564-8512, Japan |
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| Abstract: | Hydroboration of terminal and internal alkenes with N,N′,N″-trimethyl- and N,N′,N″-triethylborazine was carried out at 50 °C in the presence of a rhodium(I) catalyst. Addition of dppb or DPEphos (1 equiv.) to RhH(CO)(PPh3)3 gave the best catalyst for hydroboration of ethylene at 50 °C, resulting in a quantitative yield of B,B′,B″-triethyl-N,N′,N″-trimethylborazine. On the other hand, a complex prepared from (t-Bu)3P (4 equiv.) and Rh(coe)2Cl]2 gave the best yield for hydroboration of terminal or internal alkenes. |
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| Keywords: | Borazine catalytic hydroboration of alkene |
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