Efficient Procedures for 1-Bromo-1,3-Butadiene and 2-Bromo-1,3-Butadiene |
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| Authors: | M. A. Keegstra H. D. Verkruijsse H. Andringa L. Brandsma |
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| Affiliation: | Department of Preparative Organic Chemistry of , the University, Debije Institute , Padualaan 8, 3584, CH, Utrecht, The Netherlands |
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| Abstract: | Mixtures of Z- and E-1-bromo-1,3-butadiene in which the E- or Z- isomer predominates have been obtained in good yields by treating a mixture of Z- and E- 1,4-dibromo-2-butene (90% Z-isomer) or pure E-1,4-dibromo-2-butene, respectively, with powdered potassium hydroxide in high-boiling petroleum. 2-Bromo-1,3-butadiene was obtained in high yields by stirring a mixture of vinylacetylene, concentrated aqueous hydrogen bromide and copper(I) bromide. |
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