Facile Construction of Benzo[d][1,3]oxazocine: Reductive Radical Dearomatization of N-Alkyl Quinoline Quaternary Ammonium Salts.
Org Lett
; 26(10): 1996-2001, 2024 Mar 15.
Article
in En
| MEDLINE
| ID: mdl-38436281
ABSTRACT
Reductive radical dearomatization N-alkyl quinoline quaternary ammonium salts to synthesize structurally complex and challenging polysubstituted benzo[d][1,3]oxazocines was first reported. The mechanism showed various allyl alcohols can be converted into alkyl radicals under reduction conditions of iron/silane. These radicals then nucleophilically attack the C4 site of N-alkyl quinoline quaternary ammonium salts, and intramolecular cyclization of the resulting intermediate generates the target product. This method not only produced a series of novel polysubstituted benzo[d][1,3]oxazocines but also prepared polycyclic benzo[d][1,3]oxazocines. Finally, this strategy made up for the lack of reductive radical reports on N-alkylquinolinium salts and also had the advantages of mild reaction conditions, wide substrate range, and novel product structure.
Full text:
1
Collection:
01-internacional
Health context:
8_ODS3_consumo_sustancias_psicoactivas
Database:
MEDLINE
Language:
En
Journal:
Org Lett
Year:
2024
Document type:
Article