Synthesis of B-trisubstituted borazines via the rhodium-catalyzed hydroboration of alkenes with N, N′, N ″-trimethyl or N, N′, N ″-triethylborazine
Y Yamamoto, K Miyamoto, J Umeda, Y Nakatani…
Index: Yamamoto, Yasunori; Miyamoto, Kazuo; Umeda, Junko; Nakatani, Yasutaka; Yamamoto, Tetsuya; Miyaura, Norio Journal of Organometallic Chemistry, 2006 , vol. 691, # 23 p. 4909 - 4917
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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 (1equiv.) 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 (4equiv.) and [Rh ...
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