3-[7,19-Dichloro-8,16,18,20-tetramethoxy-17-(2-methoxycarbonyl-ethyl)-3,3,12,12-tetraoxo-3λ6,12λ6-dithia-tricyclo[12.2.2.26,9]icosa-1(17),6(20),7,9(19),14(18),15-hexaen-15-yl]-propionic acid methyl ester 以
gas 为溶剂,
以45%的产率得到3-[13,15-Dichloro-7,14,16,18-tetramethoxy-17-(2-methoxycarbonyl-ethyl)-tricyclo[10.2.2.2
5,8]octadeca-1(15),5(18),6,8(17),12(16),13-hexaen-6-yl]-propionic acid methyl ester