Stereoselective synthesis of 3-alkylsulfinylmethylisoxazolines and their use as chiral nucleophiles in the chain elongation of 2,3-O-isopropylidene-d-glyceraldehyde
摘要:
The reaction of racemic 3-methylisoxazolines and enantiomerically pure (R-S)- and (S-S)-methanesulfinates and (R-S)- and (S-S)-ethanesulfmates of 1,2:5,6-di-O-isopropylidene-D-glucofuranose allows enantiomerically pure 3-alkylsulfinylmethylisoxazolines with both absolute configurations at sulfur to be obtained. One of these has been used as a chiral nucleophile in the four carbon homologation of 2,3-O-isopropylidene-D-glyceraldehyde 17. (C) 2001 Elsevier Science Ltd. All rights reserved.