1.
Farmaco
; 58(10): 1029-32, 2003 Oct.
Artigo
em Inglês
| MEDLINE
| ID: mdl-14505734
RESUMO
Levodropropizine, an antitussive drug, was prepared in high enantiomeric excess in three steps, starting from dichloroacetone (2). Monosubstitution of 2 with sodium benzoate and subsequent baker's yeast reduction stereoselectively afforded the corresponding chlorohydrin in 73% ee, which was converted to levodropropizine and enantiomerically enriched up to 95% ee by fractional crystallisation.