2-(3,3-dicyclohexyl-ureido)-thiazole-5-carboxylic acid 、
N,N-dimethylpiperazine-1-sulfonamide hydrochloride 在
O-(1H-benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium hexafluorophosphate 、
N,N-二异丙基乙胺 作用下,
以
DMF (N,N-dimethyl-formamide) 为溶剂,
以67%的产率得到4-[2-(3,3-dicyclohexyl-ureido)-thiazole-5-carbonyl]-piperazine-1-sulfonic acid dimethylamide