cleavage of cyclopropyl alcohols 1a-c, are converted into the corresponding 5-membered cis-annulated lactones 3a-c via the Pd(II)-catalyzed carbonylation in the presence of p-benzoquinone. Isomeric, trans-fused lactones can be synthesized in a similar way (6→7). The carbonylation occurs under an atmospheric pressure of CO.
Organomercurials 2a-c中,通过区域选择性得到,
汞(II)的环丙基醇介导的裂解1A-1C,被转化成相应的5-元顺-annulated内酯3A-C通过的Pd(II) -催化的羰基化
对苯醌的存在。异构的,反式融合的内酯可以类似的方式合成(6→7)。羰基化在CO的大气压下发生。