Synthesis of substituted methyl 5,5-polymethylene-2,4-dioxotetrahydropyran-3-carboxylates |
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| Authors: | N F Kirillov V S Melekhin S N Shurov A V Plotnikov M I Vakhrin O A Maiorova |
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| Institution: | 1.Perm State University,Perm,Russia;2.Institute of Technical Chemistry, Ural Division,Russian Academy of Sciences,Perm,Russia |
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| Abstract: | Dimethyl 2-(1-bromocyclohexylcarbonyl)-, 2-(1-bromocyclopentylcarbonyl)-, and 2-(1-bromocyclobutylcarbonyl)-2-methylmalonates
reacted with zinc and aromatic aldehydes to give the corresponding methyl 1-aryl-4-methyl-3,5-dioxo-2-oxaspiro5.5]undecane-4-,
6-aryl-9-methyl-8,10-dioxo-7-oxaspiro4.5]-decane-9-, and 5-aryl-8-methyl-7,9-dioxo-6-oxaspiro3.5]nonane-8-carboxylates. |
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