Nitration of phenyl triazolinones

Details Nitration of phenyl triazolinones Nitration of phenyl triazolinones

1990-02-26

1991-04-30

Springer, David B.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D24912

Patent

active

050119338

ABSTRACT:
Process for the nitration of a compound of formula I below with nitric acid in sulfuric acid, according to the following general equation: ##STR1## where X is a Cl or F and R is haloalkyl, for example CHF.sub.2 or CF.sub.2 CHF.sub.2, in which the improvement comprises carrying out said reaction in fuming sulfuric acid.

REFERENCES:
patent: 4818275 (1989-04-01), Theodoridis
patent: 4845232 (1989-07-01), Matsui et al.
R. B. Moodie et al., J. Chem. Soc. Perkin Trans. II (1985), pp. 1457-1464.
M. M. Melhuish, J. Chem. Soc. Perkin Tarns. II (1988), pp. 1637-1642.
Kirk, R. E.; Othmer, D. F., I, "Encyclopedia of Chemical Technology", 1st ed.; Interscience: New York, 1952; vol. 9, pp. 314-316.
Kirk--Othmer, II, "Encyclopedia of Chemical Technology", 3rd ed.; Wiley, New York, vol. 15, pp. 841-847.
Moodie et al., "Electrophilic Aromatic Substitution, etc.", CA 104:87882b (1986).
Melhuish et al., "Electrophilic Aromatic Substitution, etc.", CA 110:113980c (1989).

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