Acetic Anhydride → HCID 18663350, compound

Participants

Reaction Steps

To a -20° C. solution of the thioester from Step G (1 mmol) in 3 mL of dichloromethane under argon are added 1 mmol acetic anhydride and 2 mmol sulfuryl chloride. The reaction is stirred for 1 hr during which time the temperature is allowed to rise to -5° C. The mixture is concentrated in vacuo and the crude product used for coupling in the next step.

Provenance & Evidence