4-(3R,5S-dimethyl-piperazin-1-yl)-2-methanesulfonyl-pyrimidine 、 1R-(4-trifluoromethanesulfonyloxy-pyrimidin-2-yl)-ethyl butyrate 以
乙腈 为溶剂,
以4.01 g (62%)的产率得到1R-{4-[4-(2-Methanesulfonyl-pyrimidin-4-yl)-2R,6S-dimethyl-piperazin-1-yl]-pyrimidin-2-yl}-ethyl butyrate