申请人:Shell Oil Company
公开号:US04358611A1
公开(公告)日:1982-11-09
2-Phenylsemicarbazides are prepared by a multi-step process involving: (a) treating a phenylhydrazine, or salt thereof, with a chloroformate; (b) adding phosgene; (c) treating the resulting product with an amine; and (d) hydrolyzing the resulting acylated semicarbazide. The reaction can proceed through a .DELTA..sup.2 -1,3,4-oxadiazolin-5-one intermediate formed with heating in step (b). Certain of the products are novel compounds.
2-苯基半胱氨酰脲通过多步骤制备:(a)用氯甲酸酯处理苯基肼或其盐;(b)加入光气;(c)用胺处理所得产物;(d)水解所得的酰化半胱氨酰脲。该反应可以通过在步骤(b)中加热形成的.DELTA..sup.2-1,3,4-噁二唑啉-5-酮中间体进行。其中某些产物是新颖的化合物。