lfonylimino)-5H-1,2,3-dithiazole (2) with primary and secondary amines in CH2Cl2 at room temperature gave N′-(p-toluenesulfonyl)-N-alkyl-and N,N-dialkylcyanoformamidines (3) (53–79% yields), respectively. Refluxing of 3 with secondary amines in CH2Cl2 gave 1,3-dialkyl-2-(p-toluenesulfonyl)guanidines (7) (40–99% yields), some of which (7a, 7c) were also directly obtained from the reactions of 2 with
室温下,4-
氯-5-(对
甲苯磺酰
氨基)-5H-1,2,3-二
噻唑(2)与
伯胺和仲胺在CH 2 Cl 2中的反应得到N'-(对
甲苯磺酰基)-N -烷基-和N,N-二烷基
氰基甲form (3)(53-79%产率)。将3与仲胺在CH 2 Cl 2中回流,得到1,3-二烷基-2-(对
甲苯磺酰基)
胍(7)(40-99%产率),其中一些(7a,7c)也可直接从2与相应胺的反应,无需使用溶剂。