methyl 3-[(2-methylpropan-2-yl)oxycarbonyldiazenyl]hex-2-enoate 、
ethyl 2-(1,3-dioxoisoindol-2-yl)sulfanyl-3-hydroxybut-2-enoate 在
吡啶 作用下,
以
二氯甲烷 为溶剂,
反应 2.0h,
以69%的产率得到4-O-ethyl 2-O-methyl 5-methyl-2-[N-[(2-methylpropan-2-yl)oxycarbonylamino]-C-propylcarbonimidoyl]-1,3-oxathiole-2,4-dicarboxylate