How is (1Z)-2-[(Dimethoxyphosphorothioyl)sulfanyl]-N-methylethanimidic acid (CAS: 60-51-5) typically synthesized?

This compound is typically synthesized via the reaction of dimethoxyphosphorodithioic acid with ethanamine. The method involves the nucleophilic substitution of ethanamine on the phosphorus atom, followed by methylation to form the N-methyl derivative. The reaction is generally carried out in polar aprotic solvents under ambient conditions.