Water → HCID 57950927, compound

Participants

Reaction Steps

A solution tert-butyl (1S,2S)-1-(tert-butyldimethylsilyloxy)-3-(7-chlorobenzo[d][1,3]dioxol-5-yl)-1-(thiazol-2-yl)propan-2-ylcarbamate (1.85 g, 3.51 mmol) in MeCN (14 mL) was treated with 4A mol. seives and was allowed to stir at RT for 10 minutes. Methyl trifluoromethanesulfonate (0.464 ml, 4.21 mmol) was added, and the reaction mixture was allowed to stir for 30 minutes. The reaction mixture was then concentrated under reduced pressure, and the crude residual material was dissolved in MeOH (14 mL), and cooled to 0° C. The mixture was then treated with sodium borohydride (0.398 g, 10.5 mmol) and allowed to warm to RT and stir for an additional 20 minutes. The reaction mixture was diluted with EtOAc, filtered through celite and concentrated under reduced pressure. The residue was dissolved in ACN (10 mL) and water (4 mL) and was treated with mercury(II) chloride (0.953 g, 3.51 mmol). After stirring for 30 minutes the reaction mixture was diluted with ether and filtered through a short plug of silica. The filtrate was then concentrated under reduced pressure and the crude residue was purified by column chromatography yielding tert-butyl (2S,3S)-3-(tert-butyldimethylsilyloxy)-1-(7-chlorobenzo[d][1,3]dioxol-5-yl)-4-oxobutan-2-ylcarbamate.

Provenance & Evidence