4-(2-amino-5-tert-butylthiophene-3-carbonyl)-3-ethyl-3-methylpiperazin-2-one 、
2,3-二氯苯基异氰酸酯 在
crude product 作用下,
以
四氢呋喃 为溶剂,
以to afford 1-(5-tert-butyl-3-(2-ethyl-2-methyl-3-oxopiperazine-1-carbonyl)thiophen-2-yl)-3-(2,3-dichlorophenyl)urea (50 mg, 44%) as pale yellow solid的产率得到1-(5-tert-butyl-3-(2-ethyl-2-methyl-3-oxopiperazine-1-carbonyl)thiophen-2-yl)-3-(2,3-dichlorophenyl)urea