Piskov, V. B. published the artcileConversion of carboxylic acids to amides, Related Products of amides-buliding-blocks, the publication is Zhurnal Prikladnoi Khimii (Sankt-Peterburg, Russian Federation) (1973), 46(1), 220-1, database is CAplus.
Pelargonic, lauric, and (10) benzoic acid derivatives were converted to the resp. amides (≤99%) by heating with ≥2 equivalent of H2NSO3H in oleum or polyphosphoric acid at 100-20°; 3-02NC6H4CO2H and MeNHSO3H gave 89% 3-O2NC6H4CONHMe under similar conditions.
Zhurnal Prikladnoi Khimii (Sankt-Peterburg, Russian Federation) published new progress about 2447-79-2. 2447-79-2 belongs to amides-buliding-blocks, auxiliary class Chloride,Amine,Benzene,Amide, name is 2,4-Dichlorobenzamide, and the molecular formula is C7H5Cl2NO, Related Products of amides-buliding-blocks.
Referemce:
https://en.wikipedia.org/wiki/Amide,
Amide – an overview | ScienceDirect Topics