1.
Org Biomol Chem
; 20(34): 6809-6820, 2022 Aug 31.
Artigo
em Inglês
| MEDLINE
| ID: mdl-35959998
RESUMO
Substituted on the benzene ring 4-CF3-2H-chromenes have been prepared from substituted 2-(trifluoroacetyl)phenols and vinyltriphenylphosphonium chloride according to the Schweizer protocol in moderate to excellent yields. The influence of the type and the position of aromatic ring substituents on yields of 4-CF3-2H-chromenes have been investigated. It has been shown that 4-CF3-2H-chromenes are convenient precursors to 4-CF3-coumarins.