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- W2119840924 abstract "Interactions of 5,6-dimethyl- (1), 3,5,6-trimethylthieno[2,3-d]pyrimidin-4(3H)-ones ( 2) and 2,3-dimethyl- (5-7), 2-methyl-3-methoxycarbonylthieno[2,3-d]dihydropyrrolo-, tetrahydropyrido-, tetrahydroazepino[1,2-a]pyrimidin-4-ones ( 14-16 ) with nitrating mixture were investigated. For the first time it is shown, that in dependence on the presence of substituent in position 2 and 3 of pyrimidine and thiophene rings reaction goes in various directions; by electrophilic ipso-substitution of methyl groups at C-5 by nitro group, or its oxidation up to carboxyl groups with formation corresponding 5-carboxy derivatives. It is revealed, that at absence of the substituent in position 3 (compound 1) the electrophilic ipso-substitution of methyl group by nitro group with formation of 5-nitro derivative took" @default.
- W2119840924 created "2016-06-24" @default.
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- W2119840924 date "2013-07-13" @default.
- W2119840924 modified "2023-09-27" @default.
- W2119840924 title "Thieno[2,3-d]Pyrimidin-4-Ones. Part 3.* Electrophilic Ipso-Substitution Reactions of Methyl and Methoxycarbonyl Groups" @default.
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- W2119840924 doi "https://doi.org/10.5281/zenodo.8293" @default.
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