Methyl-, phenyl-, p-chlorophenyl-, and p-tolyl(phenylethynyl)sulfones under photochemical or thermal initiation add to the central bicyclobutane C1–C7 bond of 1-R(H, Me, Ph)-tricyclo[4.1.0.02,7]heptanes anti-selectively, and form norpinic adducts containing a phenylethynyl group in a geminal to substituent R position, and an endo-oriented sulfonyl group in position 7. The corresponding ketones were prepared by the hydration of the anti-adducts by the method of Kucherov. The ketone with a methylsulfonyl substituent under reflux in toluene in the presence of KOH powder and the phase-transfer catalyst (TEBA-Cl) afforded the tricyclic sulfone.
甲基、
苯基、对
氯苯基和
对甲苯基(
苯乙炔基)磺
酮在光
化学或热引发条件下,与1-R(H, Me, Ph)-
三环[4.1.0.0
2,7]
庚烷的中心双
环丁烷C1–C7键反选择性地加成,并形成含有
苯乙炔基的诺匹尼克加合物,其位于取代基R位置的顺式位置,并在位置7处形成内导向的磺酰基团。通过Kucherov方法将反式加合物
水合制备相应的
酮。在
甲苯中回流条件下,存在KOH粉末和相转移
催化剂(
TEBA-Cl)的情况下,具有
甲基磺酰基取代基的
酮产生了三
环磺酮。