Abstract
A methoxyl group in the 4 and 6 positions has a passivating effect on the ability of the methyl group in monomethoxymethylpyrimidine derivatives to enter into azo coupling; at the same time, a methoxyl group in the 2 position does not have an appreciable effect on the activity of the methyl group because the conjugation effect of the methoxyl group in this position is less than in the 4 and 6 positions.
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See [1] for Communication XVIII.
Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 11, pp. 1573–1574, November, 1970.
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Karlinskaya, R.S., Khromov-Borisov, N.V. & Maksimova, O.V. Synthesis and transformations of pyrimidine derivatives. Chem Heterocycl Compd 6, 1470–1471 (1970). https://doi.org/10.1007/BF00476800
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DOI: https://doi.org/10.1007/BF00476800