Facile preparation of indoles and 1,2-benzothiazine 1,1-dioxides: nucleophilic addition of sulfonamides to bromoacetylenes and subsequent palladium-catalyzed cyclization.
Angew Chem Int Ed Engl
; 51(26): 6471-4, 2012 Jun 25.
Article
em En
| MEDLINE
| ID: mdl-22581582
ABSTRACT
Bromine as a double agent The bromine atom in 1-bromo-1-alkynes works as an electron-withdrawing group to effect the nucleophilic addition of sulfonamides. It again plays a pivotal role in the palladium-catalyzed cyclization of the resultant (Z)-2-(sulfonylamino)-1-bromoalkenes into nitrogen heterocycles (see scheme).
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Óxidos
/
Paládio
/
Sulfonamidas
/
Tiazinas
/
Bromo
/
Alcinos
/
Indóis
Idioma:
En
Ano de publicação:
2012
Tipo de documento:
Article