1-(4-but-2-ynyloxy-benzenesulfonyl)-piperazine-2-carboxylic acid ethyl ester 、
N-甲基-N-苯基氨基甲酰氯 以to provide 1.33 g (98%) of ethyl 1-{[4-(2-butynyloxy)phenyl]sulfonyl}-4-[(methylanilino)carbonyl]-2-piperazinecarboxylate as a brown oil的产率得到ethyl 1-{[4-(2-butynyloxy)phenyl]sulfonyl}-4-[(methylanilino)carbonyl]-2-piperazine-carboxylate