重氮甲烷 、
4-(Ethoxycarbonylmethyl-amino)-3-phenylsulfanyl-6-thioxo-6H-7-thia-2,3a,5-triaza-indene-1-carboxylic acid ethyl ester 以
乙醚 、
乙醇 为溶剂,
以98%的产率得到4-[(Z)-Ethoxycarbonylmethylimino]-6-methylsulfanyl-3-phenylsulfanyl-4H-7-thia-2,3a,5-triaza-indene-1-carboxylic acid ethyl ester