摘要:
The sulfide 4 was treated with chiral acid in a mixture of toluene and methyl iso-butylketone to precipitate the salt, which reacted with 30% H2O2 for 3 weeks at rt. The resulting crystals were collected followed by recrystallization to give the salt of enantiometrically pure sulfoxide and chiral acid 7 in 72% yield and 98.1% de, which was led to chiral sulfoxide S-3 after neutralization. Sulfoxide S-3 was led to S-1a as the candidate for an orally active HIV-1 therapeutic agent. (c) 2005 Elsevier Ltd. All rights reserved.