How is Potassium [(cyanomethyl)sulfanyl]acetate (CAS: 52069-54-2) typically synthesized?

Potassium [(cyanomethyl)sulfanyl]acetate (CAS: 52069-54-2) is synthesized via a multi-step process that starts with the reaction of acetic anhydride with sodium cyanosulfide, followed by treatment with potassium hydroxide. The reaction is typically conducted in an inert solvent such as dimethylformamide (DMF) under mild conditions. The product is then purified by recrystallization from an appropriate solvent to obtain the desired crystalline form.