5-ethylenedioxycyclopentadiene to cyclo-octa-1,3,6-triene at the 6,7-double bond is followed by an intramolecular diene addition, to give the pentacyclo-[5,5,1,02,6,03,10,04,8]tridec-11-ene system (I). However, attempts to obtain the more highly strained tetracyclo[4,4,0,02,9,05,8]dec-3-ene skeleton (VII) by an analogous intramolecular process failed.
在6,7-双键处将
六氯环戊二烯或1,2,3,4-四
氯-5,5-亚乙二氧基
环戊二烯加成至环辛基1,3,6-
三烯,然后进行分子内二烯加成,得到pentacyclo- [5,5,1,0 2,6,0 3,10,0 4,8 ]十三碳-11-烯系统(I)。然而,试图获得更高度紧张四环[4,4,0,0 2,9,0 5,8 ]癸-3-烯骨架(VII)通过类似于分子内过程失败。