Water → HCID 12415357, compound

Participants

Reaction Steps

3-(phenylsulfonyl)-4,5-dihydroisoxazole I-250a and I-250b were prepared by the oxidation of racemic 3-(phenylsulfinyl)-4,5-dihydroisoxazole I-249. 3-(Phenylsulfinyl)-4,5-dihydroisoxazole I-249 is dissolved in methylene chloride (0.03 M). m-Chloroperbenzoic acid (77% by weight, 2.95 equiv) are added in two portions and the reaction is allowed to stir at room temperature for 14 h after which it is transferred to a separatory funnel with excess water and methylene chloride. The organic layer is washed with saturated sodium bicarbonate (2×), dried over magnesium sulfate, and concentrated to provide crude solid that is recrystallized from methylene chloride/hexanes to provide the desired racemic 3-(phenylsulfonyl)-4,5-dihydroisoxazole I-250. These compounds can be separated using chiral HPLC methods known in the art. For example, see chiral HPLC Method disclosed herein. [M+H]+=371.7 m/z. Activity: C

Provenance & Evidence