In 2019 TETRAHEDRON LETT published article about DISCOVERY; EFFICIENT in [Chen, Ling; Luo, Guanglin] Bristol Myers Squibb Res & Dev, POB 4000, Princeton, NJ 08543 USA in 2019, Cited 15. The Name is 4-Nitrobenzoic acid. Through research, I have a further understanding and discovery of 62-23-7. SDS of cas: 62-23-7
A fast and convenient method using the Mukaiyama reagent was developed to prepare acyl sulfonamides from carboxylic acids and sulfonamides. This methodology is effective for a range of acids and sulfonamides proceeding in moderate to good yields with the majority of reactions complete within one hour under the optimized condition. (C) 2018 Elsevier Ltd. All rights reserved.
SDS of cas: 62-23-7. About 4-Nitrobenzoic acid, If you have any questions, you can contact Chen, L; Luo, GL or concate me.
Reference:
Phthalazine – Wikipedia,
,Phthalazine | C8H6N2 – PubChem