Author:
Read RW,Spear RJ,Norris WP
Abstract
Preparation of
4,6-dinitrobenzofurazan (6) has been investigated by a number of routes. Its
synthesis from 4,6-dinitrobenzofuroxan (4,6-dinitrobenzofurazan 1-oxide) (1) by
reduction with triphenyl- phosphine proceeds in similar overall yield to the
known method of nitration of 5-nitrobenzofurazan (8) but in fewer steps.
Nitration of 4-nitrobenzofurazan (7) was studied as an alternative route, and
the difference in reactivity between (7) and (8) is discussed. The benzofurazan
(6) readily forms hydroxy and methoxy Meisenheimer complexes which have been
isolated as stable, but highly explosive, potassium salts.
Cited by
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