Kumar, Tarun published the artcileSynthesis of Aminophenanthrenes and Benzoquinolines via Hauser-Kraus Annulation of Sulfonyl Phthalide with Rauhut-Currier Adducts of Nitroalkenes, Formula: C10H11NO4, the publication is Organic Letters (2017), 19(16), 4283-4286, database is CAplus and MEDLINE.
The Hauser-Kraus reaction of sulfonyl phthalide with nitroalkene derivatives provides access to aminophenanthrenes, including phenanthrene-substituted amino acids and benzoquinolines. The intermediate quinones bearing a key ketoalkyl moiety undergoes facile intramol. enamine cyclization. Interestingly, enamines derived from primary and secondary amines undergo cyclization via C-centered nucleophilic attack to provide aminophenanthrenes I [R1R2 = (CH2)4, (CH2)2O(CH2)2, etc.; Ar = 4-FC6H4, 3-MeOC6H4, etc.] whereas those derived from ammonia undergo cyclization via N-centered nucleophilic attack leading to benzoquinolines II (Ar = 4-FC6H4, 4-MeOC6H4, Ph, etc.). A one-pot protocol for the direct transformation of phthalides and nitroalkene derivatives to aminophenanthrenes and benzoquinolines has also been developed.
Organic Letters published new progress about 4230-93-7. 4230-93-7 belongs to catalysis-chemistry, auxiliary class Alkenyl,Nitro Compound,Benzene,Ether, name is 1,2-Dimethoxy-4-(2-nitrovinyl)benzene, and the molecular formula is C10H11NO4, Formula: C10H11NO4.
Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia