Enantioselective addition of thiols to trifluoromethyl ketimines: synthesis of N,S-ketals.
Org Biomol Chem
; 18(37): 7431-7436, 2020 09 30.
Article
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| MEDLINE
| ID: mdl-32936203
ABSTRACT
An efficient enantioselective addition of thiols to acyclic trifluoromethyl ketimines has been established by using a bifunctional squaramide catalyst, which was derived from quinine, and the reaction was completed in 5 to 10 min. The construction of chiral tetrasubstituted carbon centers bearing trifluoromethylated N,S-ketals has been achieved in high yields (up to 96% yield) with excellent enantioselectivities (up to 99% ee).
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MEDLINE
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En
Revista:
Org Biomol Chem
Asunto de la revista:
BIOQUIMICA
/
QUIMICA
Año:
2020
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Article