Selective aromatic nitration

Details Selective aromatic nitration Selective aromatic nitration

1979-12-26

1983-07-12

Milestone, Norma S.

Compositions

Compositions containing a single chemical reactant or plural...

Organic reactant

549351, 549352, 549353, 568939, 568940, 260688, C09K 300, C07B 1100, C07D32300

Patent

active

043929788

ABSTRACT:
A method and reagent for the selective nitration of aromatic hydrocarbons which comprises contacting a complex of at least a catalytic amount of a polyether with a nitronium containing substance, e.g., NO.sub.2 BF.sub.4 with an aromatic hydrocarbon, e.g., toluene with at least one replaceable hydrogen. Nitration of toluene with these complexes at ambient temperature resulted in a reduction in meta substitution. In competitive studies, soluble crown ether complexes of NO.sub.2 BF.sub.4 in CH.sub.2 Cl.sub.2 nitrated toluene 45-59 times faster than they nitrated benzene.

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