tert-butyl-4-[(2-aminoethyl)sulfonyl]-1-piperazinecarboxylate 、
4-氯-2-甲硫基嘧啶-5-羧酸 以to afford tert-butyl 4-(2-(5-formyl-2-(methylthio)pyrimidin-4-ylamino)ethylsulfonyl)piperazine-1-carboxylate which的产率得到tert-butyl-4-(2-(5-formyl-2-(methylthio)pyrimidin-4-ylamino)ethylsulfonyl)piperazine-1-carboxylate