- Tytuł:
-
Nowe technologie w asymetrycznej syntezie α,α-dipodstawionych α-aminokwasów
New technologies in the asymmetric synthesis of α,α-disubstituted α-amino acids - Autorzy:
-
Hejmanowska, J.
Albrecht, Ł. - Powiązania:
- https://bibliotekanauki.pl/articles/134855.pdf
- Data publikacji:
- 2016
- Wydawca:
- ADVSEO
- Tematy:
-
organocatalysis
azlactones
geminal bisphosphonates
3,4-dihydrocoumarins
tetrahydrothiophenes
α,α-disubstituted amino acids - Opis:
- Optically active α,α-disubstituted α-amino acids represent a privileged structural motif present in numerous natural products and pharmacologically active molecules. These compounds have interesting biological properties owing to the presence of the quaternary stereogenic center. In recent years intensive development of methods for the synthesis of α,α-disubstituted α-amino acids has been observed. Azlactones constitute an important group of quaternary amino acid precursors that have found widespread application in organic synthesis. The aim of our work was to develop a new enantioselective methods for the synthesis α,α-disubstituted α-amino acids containing either geminal bisphosphonate, 3,4-dihydrocoumarin or tetrahydrothiophene moiety. Michael addition constitutes a key step in the developed synthetic strategies. The reactions were performed under basic conditions, using cinchona alkaloid derivatives with the proposed synthetic technologies being highly stereoselective.
- Źródło:
-
Technical Issues; 2016, 2; 11-17
2392-3954 - Pojawia się w:
- Technical Issues
- Dostawca treści:
- Biblioteka Nauki
Artykuł