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Five-membered 2,3-dioxoheterocycles: XC. Reaction of 4,5-bis(methoxycarbonyl)-1H-pyrrole-2,3-diones with enaminoesters. crystal and molecular structure of 4-methyl 9-ethyl 7-benzyl-3-hydroxy-8-methyl-1-(4-methoxyphenyl)-2,6-dioxo-1,7-diazaspiro[4.4]nona-3,8-diene-4,9-dicarboxylate |
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| Authors: | P S Silaichev M A Chudinova P A Slepukhin A N Maslivets |
| Institution: | 1. Institute of Natural Sciences at Perm State National Research University, Perm, 614990, Russia 2. Perm State National Research University, Perm, Russia 3. Postovskii Institute of Organic Synthesis, Ural Branch, Russian Academy of Sciences, Ekaterinburg, Russia |
| Abstract: | 1-Aryl-4,5-bis(methoxycarbonyl)-1H-pyrrole-2,3-diones react with ethyl 3-(benzylamino)but-2-enoate and ethyl 3-(benzylamino)-3-phenylacrylate giving 4-methyl 9-ethyl 1-aryl-7-benzyl-3-hydroxy-8-methyl- and 4-methyl 9-ethyl 1-aryl-7-benzyl-3-hydroxy-8-phenyl-2,6-dioxo-1,7-diazaspiro4.4]nona-3,8-diene-4,9-dicarboxylates. |
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