Dimethyl Sulfoxide → [4-((R)-2-formyl-6-oxo-piperidin-1-yl)-but-2-ynyloxy]-acetic acid methyl ester

Participants

Reaction Conditions

Reaction Steps

EDCI (214 mg, 1.12 mmol) was added to a solution of [4-((R)-2-hydroxymethyl-6-oxo-piperidin-1-yl)-but-2-ynyloxy]-acetic acid methyl ester (100 mg, 0.37 mmol) in benzene (3.5 mL). The reaction mixture was cooled to 0° C. and DMSO (0.11 mL, 1.55 mmol) was added. After 5 min at 0° C., pyridinium trifluoroacetate (79 mg, 0.41 mmol) was added. The reaction was allowed to warm to rt and then was stirred at rt for 3 h. The solution was decanted from the oily residue and the residue was washed with benzene (3×3 mL). The combined benzene phases were concentrated in vacuo to afford crude [4-((R)-2-formyl-6-oxo-piperidin-1-yl)-but-2-ynyloxy]-acetic acid methyl ester, which was used without further purification.

Provenance & Evidence