Racemic thiol esters of alpha-arylpropionic acids were deracemized by a procedure which featured deprotonation with LDA or KHMDS, transformation into the TMS or TBDMS enol ethers, and enantioselective protonation of the silyl enol ethers using (R)-1,1'-bi-2-naphthol/SnCl4. Oxidative hydrolysis of the enantiomerically enriched mixtures of thiol esters thus obtained yielded the (S)-enantiomers of ibuprofen and naproxen with ees up to 82%.

DERACEMIZATION OF THIOL ESTERS OF ALFA-ARYLPROPIONIC ACIDS

CLERICUZIO, Marco;DEGANI, Jacopo;DUGHERA, Stefano;FOCHI, Rita
2003-01-01

Abstract

Racemic thiol esters of alpha-arylpropionic acids were deracemized by a procedure which featured deprotonation with LDA or KHMDS, transformation into the TMS or TBDMS enol ethers, and enantioselective protonation of the silyl enol ethers using (R)-1,1'-bi-2-naphthol/SnCl4. Oxidative hydrolysis of the enantiomerically enriched mixtures of thiol esters thus obtained yielded the (S)-enantiomers of ibuprofen and naproxen with ees up to 82%.
2003
14
119
125
thiol esters; alpha-arylpropionic acids; deracemization; ibuprofen; naproxen
M. CLERICUZIO; I DEGANI; S. DUGHERA; R. FOCHI
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/5323
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact