Tryniszewski, Michal published the artcileReductive Condensation of a Nitro Group with Carboxylic Acids Promoted by Phosphorus(III) Compounds: A Short Route to 5 H -Dibenzo[b,e][1,4]diazepin-11(10 H )-ones, HPLC of Formula: 60091-87-4, the publication is Synthesis (2020), 52(20), 3086-3094, database is CAplus.
Tributyl- or triphenylphosphine promoted a one-pot, three-step method for the synthesis of differently substituted dibenzodiazepinones such as I [R = H, n-Bu; R1 = H, 8-Cl, 7-OMe, etc.; R2 = 2-Me, 2-CN; Z = N, CH; Y = S, NCH, HCCH] from N-aryl-2-nitroanilines. Pyridine analogs I [R = H; R1 = 9-Cl; R2 = H; Z = CH; Y = NCH] and the corresponding thiazepinones could also be formed using this method. The process involved deoxygenation of the nitro group, then formation of an iminophosphorane intermediate and its intramol. condensation with a carboxyl group placed in the N-aryl group. The role of the carboxyl group in the formation of the iminophosphorane and the mode of cyclization were discussed.
Synthesis published new progress about 60091-87-4. 60091-87-4 belongs to chlorides-buliding-blocks, auxiliary class Chloride,Nitro Compound,Carboxylic acid,Amine,Benzene, name is 2-((4-Chloro-2-nitrophenyl)amino)benzoic acid, and the molecular formula is C12H17BO4S, HPLC of Formula: 60091-87-4.
Referemce:
https://en.wikipedia.org/wiki/Chloride,
Chlorides – an overview | ScienceDirect Topics