5-Chloro-2-nitroaniline → 1-(3-Amino-4-nitro-phenyl)-1H-pyrrole-2-carboxylic acid methyl ester

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Reaction Steps

The title compound was prepared from N-(5-amino-2-nitro-phenyl)-acetamide [prepared from commercially available 5-chloro-2-nitroaniline as described in Example F6] and 2,5-dimethoxy-tetrahydro-furan-2-carboxylic acid methyl ester [CAS-no. 39658-49-6] in HOAc at 60° C. for 2 h according to the general procedure F. Obtained as a light yellow solid (757 mg). Deacetylation of this material was perfomed by stirring with 10 eq. NaOMe-sol. in MeOH at 23° C. for 1 h. Obtained as a yellow solid (594 mg).

Provenance & Evidence