Hydroborierung von 3-methyl-1,3-butadien mit 1,2:1,2-bis(tetramethylen)diboran(6) |
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Authors: | Rosalinda Contreras Bernd Wrackmeyer |
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Institution: | Chemistry Department, Centro de Investigacion y de Estudios Avanzados, A.P. 14-740 Mex., 14 DF Mexico;Institut für Anorganische Chemie der Universität München, Meiserstrasse 1, D-8000 München, 2 Germany |
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Abstract: | The nature of the hydroboration product obtained from 3-methyl-1,3-butadiene and 1,2 : 1,2-bis(tetramethylene)diborane(6) (1) allows for the discussion of the reaction mechanism. The hydroboration proceedsby retention of the cyclic structure in the first step, followed by exchange of BH and BC bonds and final cyclic hydroboration to give 1-(boracyclopentyl)-4-(3-methylboracyclopentyl)butane (5). The structural assignment of 5 is based on 1H, 11B and 13C NMR data. |
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