How is Ethyl 4-methyl-1,2,3-thiadiazole-5-carboxylate (CAS: 18212-20-9) typically synthesized?

Ethyl 4-methyl-1,2,3-thiadiazole-5-carboxylate (CAS: 18212-20-9) is typically synthesized by the reaction of ethyl isothiocyanate with 4-methyl-1,2,3-thiadiazole-5-carbonitrile. The reaction is usually carried out in the presence of a base such as sodium carbonate, and the product is isolated by recrystallization. The yield is generally around 75-85%, and the reaction is highly selective and efficient.