Stereoselective Cyclotrimerization of Enantiopure Iodonorbornenes Catalyzed by Pd Nanoclusters for <i>C</i><sub>3</sub> or <i>C</i><sub>3<i>v</i></sub> Symmetric <i>syn</i>-Tris(norborneno)benzenes
作者:Shuhei Higashibayashi、A. F. G. Masud Reza、Hidehiro Sakurai
DOI:10.1021/jo100710h
日期:2010.7.2
C3 or C3vsymmetricenantiopuresyn-tris(norborneno)benzenes with various functional groups were synthesized through Pd-catalyzed cyclotrimerization of enantiopureiodonorbornenes. The generality of Pd-catalyzed cyclotrimerization for syn-tris(norborneno)benzenes were well-demonstrated.
Novel Synthesis and Structures of Tris-Annelated Benzene Donors for the Electron-Density Elucidation of the Classical Mills−Nixon Effect
作者:R. Rathore、S. V. Lindeman、A. S. Kumar、J. K. Kochi
DOI:10.1021/ja980805v
日期:1998.6.1
alternation relevant to the Mills−Nixoneffect. Most importantly, the efficient synthesis of 1s crystals of extraordinary quality allows us (for the first time) to make precise electron-density measurements of the “banana-type” distortion and the ellipticity (π-character) of the various aromatic C−C bondssufficient to identify the electronic origin of the classical Mills−Nixoneffect. The unique electron-donor