Chemistry of Heterocyclic Compounds p. 1189 - 1191 (1987)
Update date:2022-08-04
Topics:
Skvortsov, I. M.
Astakhova, L. N.
The selectivity of the position of nitration of 1-methylpyrrole, 1,2-dimethylpyrrole, 1,2-dihydropyrrolizine, and 5,6,7,8-tetrahydropyrrocoline was found.In contrast to the selectivity of substitution during nitration of their carbocyclic analogs, o-xylene, indane, and tetraline, the fraction of the α-nitro-isomer in the nitration products of 1,2-dimethylpyrrole is smaller than the fraction of α-nitro derivatives of 1,2-dihydropyrrolizine and 5,6,7,8-tetrahydropyrrocoline, and in the latter cases the isomers are almost equally distributed.During nitration of the above bicyclic pyrroles, the Mills-Nixon effect does not appreciably influence the selectivity of the position of the reaction.
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