In 2020.0 ORG LETT published article about DIELS-ALDER REACTIONS; CHIRAL PHOSPHORIC-ACID; LEWIS-ACID; BRONSTED ACID; ONE-POT; TETRAHYDROQUINOLINES; EFFICIENT; MECHANISM; CLOSURE; ACCESS in [Huang, Jun-Xiang; Hou, Ke-Qiang; Hu, Qi-Long; Chen, Xue-Ping; Li, Jian; Chan, Albert S. C.; Xong, Xiao-Feng] Sun Yat Sen Univ, Sch Pharmaceut Sci, Guangdong Key Lab Chiral Mol & Drug Discovery, Guangzhou 510006, Peoples R China in 2020.0, Cited 57.0. The Name is 4-Nitrobenzoic acid. Through research, I have a further understanding and discovery of 62-23-7. COA of Formula: C7H5NO4
We report the first highly enantio- and diastereoselective three-component Povarov reaction between anilines and aldehydes catalyzed by a chiral amine catalyst. A wide variety of substituted tetrahydroquinolines were obtained with moderate to good yields and excellent enantioselectivity and diastereoselectivity (up to 99% ee and >95:5 dr) under the reaction conditions. Furthermore, the reaction intermediates could be efficiently converted to other valuable building blocks.
COA of Formula: C7H5NO4. About 4-Nitrobenzoic acid, If you have any questions, you can contact Huang, JX; Hou, KQ; Hu, QL; Chen, XP; Li, J; Chan, ASC; Xong, XF or concate me.
Reference:
Phthalazine – Wikipedia,
,Phthalazine | C8H6N2 – PubChem