Metal-Free Ring-Expansion Reaction of Six-membered Sulfonylimines with Diazomethanes: An Approach toward Seven-Membered Enesulfonamides.
Angew Chem Int Ed Engl
; 55(4): 1441-4, 2016 Jan 22.
Article
em En
| MEDLINE
| ID: mdl-26663740
ABSTRACT
A new metal-free, ring-expansion reaction of six-membered N-sulfonylimines with unstable diazomethanes, generated in situ from the N-tosylhydrazones, has been developed. This reaction delivers valuable seven-membered enesulfonamides by a Tiffeneau-Demjanov rearrangement and intramolecular proton transfer tautomerization process. Moreover, this ring-expansion reaction can be carried out in a one-pot fashion and scaled up to the gram scale by using aryl aldehydes, without the need to isolate the N-tosylhydrazone.
Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Sulfonamidas
/
Diazometano
/
Iminas
/
Metais
Idioma:
En
Revista:
Angew Chem Int Ed Engl
Ano de publicação:
2016
Tipo de documento:
Article
País de afiliação:
China