反应详情

PCT Application No. GB99/01753 (Publication No. WO 99/64417) describes the preparation of 5(R)-Hydroxymethyl-3-(4-(1-benzyl-1,2,5,6-tetrahydropyrid-4-yl)-3,5-difluorophenyl)oxazolidin-2-one (Reference Example 4 of GB99/01753), which is reacted under Mitsunobu conditions with 3-hydroxyisoxazole to give 5(R)-Isoxazol-3-yloxymethyl-3-(4-(1-benzyl-1,2,5,6-tetrahydropyrid-4-yl)-3,5-difluorophenyl)oxazolidin-2-one (Reference Example 5 of GB99/01753). Purification (by column chromatography) and subsequent reaction with 1-chloroethyl chloroformate and work-up gives 5(R)-Isoxazol-3-yloxymethyl-3-(4-(1,2,5,6-tetrahydropyrid-4-yl)-3,5-difluorophenyl)oxazolidin-2-one (Reference Example 6 of GB99/01753).