Tromelin, Anne et al. published their research in Synthesis in 1985 | CAS: 33094-66-5

2-Nitrobenzofuran (cas: 33094-66-5) belongs to benzofurans derivatives.Benzofuran is one of the most significant oxygen-containing heterocycles consisting of fused benzene and furan ring, which are widely presented in various naturally occurring and synthetically active compounds. In nature, benzofurans have occupied an important role among the plant phenols & several pharmacologically active compounds.Application of 33094-66-5

An improved synthesis of 2-nitrobenzo[b]furans was written by Tromelin, Anne;Demerseman, Pierre;Royer, Rene. And the article was included in Synthesis in 1985.Application of 33094-66-5 This article mentions the following:

Ten nitrobenzofurans I (R = H, MeO, Br, NO2, MeCO, CO2Me, cyano; R1 = H, MeO; R2 = H, MeO, Br) were prepared in 2 steps by treating hydroxybenzaldehydes II with BrCH2NO2 and K2CO3 in Me2CO to give 48-97% hydroxynitrodihydrobenzofurans III which were dehydrated in refluxing Ac2O to quant. give I. In the experiment, the researchers used many compounds, for example, 2-Nitrobenzofuran (cas: 33094-66-5Application of 33094-66-5).

2-Nitrobenzofuran (cas: 33094-66-5) belongs to benzofurans derivatives.Benzofuran is one of the most significant oxygen-containing heterocycles consisting of fused benzene and furan ring, which are widely presented in various naturally occurring and synthetically active compounds. In nature, benzofurans have occupied an important role among the plant phenols & several pharmacologically active compounds.Application of 33094-66-5

Referemce:
Benzofuran – Wikipedia,
Benzofuran | C8H6O – PubChem