Chemistry of Heterocyclic Compounds p. 1023 - 1025 (1985)
Update date:2022-08-03
Topics:
Gurovets, A. S.
Sharf, V. Z.
Belen'kii, L. I.
The hydrodehalogenation of 2-chloro-, 2-bromo-, 3-bromo, and 3,5-dibromopyridine has been studied in the presence of a palladium complex catalyst immobilized on silica gel, and a Pd/C catalyst.Cleavage of bromine from bromopyridines over the Pd complex is significantly faster than from the bromo-substituted furanes and thiophenes previously studied.Debromination over Pd/C is faster than over the complex catalyst.Over both catalysts 3-bromopyridine debrominates faster than the 2-isomer.When molecular deuterium is used, the respective deuterated pyridines can be obtained.
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