ethyl 2-(2-methyl-6,7-dihydropyrano[4,3-b]pyrrol-1(4H)-yl)acetate 、
ethyl 4-(4-(bromomethyl)phenylsulfonyl)piperazine-1-carboxylate 在
potassium carbonate 作用下,
以
乙腈 为溶剂,
反应 24.0h,
以21%的产率得到ethyl 4-(4-((1-(2-ethoxy-2-oxoethyl)-2-methyl-1,4,6,7-tetrahydropyrano[4,3-b]pyrrol-3-yl)methyl)phenylsulfonyl)piperazine-1-carboxylate