Nitration process

Details Nitration process Nitration process

1997-10-30

1999-09-14

Killos, Paul J.

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

Organic compounds

Oxygen containing

568939, 568840, 568424, 568306, 560 21, 562434, 562435, 562438, C07C 4300, C07C20500, C07C 2900

Patent

active

059525312

ABSTRACT:
A process for the nitration of an aromatic or heteroaromatic compound with a nitrating agent comprising nitric acid or a mixture of nitric and sulphuric acids, characterised in that nitration is performed in a solvent comprising at least 50% v/v of a C.sub.1 -C.sub.6 alkyl ester of a C.sub.1 -C.sub.4 carboxylic acid. The process is of particular use for the nitration of diphenyl ethers to give compounds which are useful as herbicides or as intermediates in the synthesis of herbicides.

REFERENCES:
patent: 2435314 (1948-02-01), Kokatnur
patent: 2435544 (1948-02-01), Kokatnur
patent: 4429146 (1984-01-01), Liu
patent: 4723985 (1988-02-01), Forster et al.
Bisagni et al., Tetrahedron, 1996, vol. 52, No. 31, pp. 10427-10440, "A phenanthridines)".
Masci, Tetrahedron, 1989, vol. 45(a), 2719-2730, "The Selectivity of Electrophilic Aromatic Nitration and the Effect of the Organic Solvents".

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