Under the optimal reaction condition,6-thia-1,2,4-triaza-bicyclo[3. 2. 0]hepta-2,4-diene was synthesized from hydrated hydrazine,paraformaldehyde and thiocyanate by one pot reaction. The total yield is about 65. 0%. The structure is characterized by 1 H NMR.%以水合肼、多聚甲醛、硫氰酸钾为原料，采用了＂一锅法＂反应，合成6－硫－1，2，4－三氮双环[3．2．0]庚烷－2，4－二烯，对反应条件进行了优化。最高收率达65．0％。其结构经1 H NMR确证。
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