The title compound was prepared in two steps by [2 + 2] photochemical cycloaddition between (E)-1,2-dichloroethene and maleic anhydride followed by reductive chlorine elimination with activated zinc. This safe synthetic route gave cis-cyclobut-3-ene-1,2-dicarboxylic anhydride in good overall yield and could be carried out on a multigram scale.
通过(E)-
1,2-二氯乙烯和
马来酸酐之间的[2+2]光
化学环加成,然后用活性
锌还原
氯消除,分两步制备标题化合物。这种安全的合成路线以良好的总收率获得了顺式
环丁烯-3-烯-1,2-二
甲酸酐,并且可以在数克规模上进行。