Methoxycarbonyl isothiocyanate → 1,2-Bis(3-methoxycarbonyl-2-thioureido)-4-methylthiomethoxybenzene

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Reaction Steps

The 1,2-diamino-4-methylthiomethoxybenzene prepared above is dissolved in 60 ml. acetone and treated overnight with 6 g. methoxycarbonyl isothiocyanate at room temperature. The mixture is concentrated and the residue stirred with 500 ml. water and the brown solid filtered off. The residue is extracted with 250 ml. dichloromethane, filtered, treated with charcoal, and recrystallized from dichloromethanebenzene to afford 1,2-bis(3-methoxycarbonyl-2-thioureido)-4-methylthiomethoxybenzene.

Provenance & Evidence