An article Rh(i)-Catalyzed [3+2] annulation reactions of cyclopropenones with amides WOS:000468400200012 published article about SUBSTITUTED 3-METHYLENEISOINDOLIN-1-ONES; CARBONYLATION; CYCLIZATION; OXIMES; ACID in [Haito, Akira; Chatani, Naoto] Osaka Univ, Dept Appl Chem, Fac Engn, Suita, Osaka 5650871, Japan in 2019.0, Cited 28.0. The Name is 4-Nitrobenzoic acid. Through research, I have a further understanding and discovery of 62-23-7. Formula: C7H5NO4
Rh(I)-Catalyzed [3+ 2] annulation reactions of cyclopropenones with amides are reported. The reaction provides a direct approach for producing highly substituted alpha, beta-unsaturated gamma-lactam derivatives. The presence of an N(sp(2)) atom in the N-alkyl group of the amide, such as the 2-pyridinylmethyl or 8-aminoquinonyl group, is essential for the success of the reaction.
Formula: C7H5NO4. About 4-Nitrobenzoic acid, If you have any questions, you can contact Haito, A; Chatani, N or concate me.
Reference:
Phthalazine – Wikipedia,
,Phthalazine | C8H6N2 – PubChem