Abstract
The kinetics of exchange of bromine in 5-bromo-2-carbonyl derivatives of furan by dimethylamino and morpholino groups was studied. The reaction is kinetically complicated for 5-bromofurfural (I) — aldehyde I initially reacts simultaneously at both the carbonyl group to give the aminocarbinol and at the bromine atom with exchange by an amino group. The accumulation of the ammonium salt in the latter reaction leads to the development of an autocatalytic reaction, the product of which is 5-N,N-dialkylaminofurfurylidene-N,N-dialkylammonium bromide. Amines react with the ketones without complications; the second-order rate constants are presented. The rate of exchange decreases in the order CHO > COC6H5 > COCH=CHC6H5 > COCH3 > CH=CHCOC6H5.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 11, pp. 1465–1470, November, 1976.
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Novikov, V.N., Babeshkina, L.D. Kinetics and mechanism of the reaction of 5-bromo-2- carbonyl derivatives of furan with amines. Chem Heterocycl Compd 12, 1208–1212 (1976). https://doi.org/10.1007/BF00470214
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DOI: https://doi.org/10.1007/BF00470214