S-(1-(2,4-difluorophenyl)-6-(5,5-dimethyl-1,3-dioxolan-2-yl)-6-methyl-1-oxoheptan-4-yl) O-ethyl carbonodithioate 在
potassium carbonate 作用下,
以
乙腈 、
叔丁醇 为溶剂,
反应 3.5h,
以77%的产率得到2-[2-(5,5-dimethyl-[1,3]dioxan-2-yl)-2-methyl-propyl]-7-fluoro-2,3-dihydro-thieno[2,3-b]thiochromen-4-one