Base-catalysed reactions of glyoxal. Part II. 2,3,5,6-Tetrahydroxypiperazine-1,4-disulphonic acid derivatives

摘要: Salts of 2,3,5,6-tetrahydroxypiperazine-1,4-disulphonic acid were prepared by the addition aqueous glyoxal to sulphamic in presence base. The free was not isolated. 2,3,5,6-Tetra-acetoxy-1,4-dinitropiperazine and 2,5-diacetoxy-3,6-dinitrato-1,4-dinitropiperazine action nitric acetic anhydride on tetrahydroxypiperazine salts.