Functionalization at C??5 and at the C??6 methyl group of 4??methoxy??6??methyl??2??pyrone

R Bacardit, M Moreno??Mañas…

文献索引：Bacardit, R.; Moreno-Manas, M.; Pleixats, R. Journal of Heterocyclic Chemistry, 1982 , vol. 19, p. 157 - 160

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被引用次数: 19

摘要

Abstract A new entry to C-5 substituted 4-hydroxy-6-methyl-2-pyrones has been achieved. The best conditions to prepare the monobromo and the dibromo derivatives at C-3 and the C- 6 methyl group of the title pyrone have been defined. The synthetic applicability of the phosphonium salts at CH 3-C-6 of both 4-methoxy-6-methyl-2-pyrone, 5, and dehydroacetic acid, 2, has also been evaluated.