Scheme 1.

Synthesis of methyl (E)-3-(1-methyl-1H-imidazol-2-ylthio)acrylate 3 and methyl (Z)-3-(1-methyl-1H-imidazol-2-ylthio)acrylate 4.

Synthesis of methyl (E)-3-(1-methyl-1H-imidazol-2-ylthio)acrylate 3 and methyl (Z)-3-(1-methyl-1H-imidazol-2-ylthio)acrylate 4.