The cleavage of the fused-ring cyclopropane hydroxy derivative 1 by means of HgII is highly stereoselective and gives a rearranged organomercurial 3, transmetallation of which with PdII can be controlled by ligands to afford either lactol 4 or acid 8; the latter compound is formed via an intramolecular insertion of Pd into the C–H bond (6→7), as evidenced by isotopic labelling.
通过HgII对
环丙烷羟基衍
生物1的裂解具有高度立体选择性,并产生
重组有机
汞3,其与PdII的跨
金属化可通过
配体控制,生成内酯4或酸8;后者是通过Pd分子内插入C-H键(6→7)形成的,同位素标记证实了这一点。