Allenes—XXXV : The addition of allenic carbenes to oxygen heterocycles |
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| Authors: | SR Landor V Rogers HR Sood |
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| Institution: | Exeter University, Exeter EX4 4QD, England;Thames Polytechnic, London SE 18, England |
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| Abstract: | Dimethylvinylidene carbene from 1-bromo-3-methylbutadiene and potassium t-butoxide adds to 2,5-dihydrofuran and 2,3-dihydropyran to give the corresponding allenic cyclopropanes. 1,4-Cycloaddition of the allenic carbene to furan followed by hydration during work up yields the bicyclic ketone 11. |
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