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2005
Organo-selenium compounds
S 0130
An Improved Procedure for the Nitration of Benzo-2,1,3-selenadiazoles and Their
to ortho-Phenylenediamines. — A convenient, high yielding method for
21- 184 Reduction
the nitration of benzo-2,1,3-selenadiazoles (I) (8 examples) without competing solvolysis of halogen substituents on the benzene ring using nitric acid dissolved in a mixture
of methanesulfonic acid and phosphorus pentoxide (Eaton's reagent) is described. The
method is applied to the multi-gram preparation of 3-nitrophenylenediamine (III). —
(WRIGHT, S. W.; MCCLURE, L. D.; J. Heterocycl. Chem. 41 (2004) 6, 1023-1026;
Pfizer Global Res. Dev., Groton, CT 06340, USA; Eng.) — C. Hettrich
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