Preparation of Furo[3,2-c]coumarins from 3-Cinnamoyl-4-hydroxy-2H-chromen-2-ones and Acyl Chlorides: A Bu3P-Mediated C-Acylation/Cyclization Sequence.
Angew Chem Int Ed Engl
; 54(29): 8502-5, 2015 Jul 13.
Article
em En
| MEDLINE
| ID: mdl-26033344
ABSTRACT
A Bu3P-mediated cyclization reaction of 3-cinnamoyl-4-hydroxy-2H-chromen-2-ones though electrophilic addition of acyl chlorides towards the synthesis of highly functionalized furo[3,2-c]coumarins bearing a phosphorus ylide moiety is described. These unprecedented cyclization reaction proceeds under mild reaction conditions within short reaction times (1â
min to 1â
h), and can be further applied in the synthesis of alkenyl-substituted furo[3,2-c]coumarins by the treatment with carbonyl electrophiles under basic conditions.
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1
Base de dados:
MEDLINE
Assunto principal:
Furocumarinas
/
Cloretos
/
Cromonas
Idioma:
En
Ano de publicação:
2015
Tipo de documento:
Article