[(3-dimethylcarbamoyl-2,3,4,5-tetrahydro-1H-3-benzazepin-7-yl)sulfonyl]carbamic acid ethyl ester 、
环戊胺 在
silica gel 、
甲醇 、
氯仿 作用下,
以
1,4-二氧六环 为溶剂,
反应 1.0h,
以yields the 1-cyclopentyl-3-[(3-dimethylcarbamoyl-2,3,4,5-tetrahydro-1H-3-benzazepin-7-yl)sulfonyl]urea, m.p. 179°-180° C.的产率得到1-cyclopentyl-3-[(3-dimethylcarbamoyl-2,3,4,5-tetrahydro-1H-3-benzazepin-7-yl)sulfonyl]urea