2Pellegrin Valdo. Systhese de L'indazole-l-^15 N de L' indazole- 2-^15N et de leurs derives N-methyles[J]. Journal of Labelled Compounds and Radiopharmaceuticals, 1981, 18 (7) : 999-1008
3Vlaskina V, Perevalov V P. Novel synthesis of substituted benzimidazoles by reduction of esters of 4-alkylamino-3,5-dinitrobenzoic acids by tin chloride [J]. Chemistry of Heterocyclic Compounds, 2004,40(4) :523-524
4Shine. Aromatic Rearrangements[M]. New York: American Elsevier, 1967. 230
5Heller H E. A new view of the arylhydroxylamine rearrangement[J]. Nature, 1951,168(4282) :909-910