Asymmetric synthesis of α,ß-diamino acid derivates via Mannich-type reactions of a chiral Ni(II) complex of glycine with N-tosyl imines.
Org Biomol Chem
; 9(20): 7144-50, 2011 Oct 21.
Article
en En
| MEDLINE
| ID: mdl-21858319
ABSTRACT
A practical procedure composed of an asymmetric Mannich-type reaction between N-tosyl imine and a Ni(II) complex of glycine with (R)-o-[N-(N-benzylprolyl)amino]bezaophenone (BPB) as a chiral auxiliary catalyzed by Et(3)N in DMF to (R,2R,3S)-complexes, and decomposition of products with HCl to offer syn-(2R,3S)-α,ß-diamino acids, was developed. Stereochemical mechanism of the Mannich reaction was proposed and supported by determining the absolute configuration of the product of the Mannich reaction relying on X-ray analysis. This two-step approach to amino acids was a general method and adapted to large-scale preparation.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Aminoácidos Diaminos
/
Glicina
/
Iminas
/
Níquel
Idioma:
En
Revista:
Org Biomol Chem
Asunto de la revista:
BIOQUIMICA
/
QUIMICA
Año:
2011
Tipo del documento:
Article
País de afiliación:
China