[EN] SYNTHESIS OF BICYCLO[2.2.2]OCTANE DERIVATIVES<br/>[FR] SYNTHÈSE DE DÉRIVÉS DE BICYCLO[2.2.2]OCTANE
申请人:EASTMAN CHEM CO
公开号:WO2019075004A1
公开(公告)日:2019-04-18
Provided is a process for the preparation of certain 1,4-bicyclo[2.2.2]octane derivatives. The new synthetic procedure involves treating 1,4-dimethylene cyclohexane with an oxidizing agent in the presence of a transition metal catalyst to afford an oxo-substituted bicyclo[2.2.2]octane species. This intermediate structure can then be further derivatized. The processes of this disclosure thus affords a novel and simplified means for the commercial production of a wide variety of bicyclo[2.2.2]octane derivatives.
Unexpectedly Similar Charge Transfer Rates through Benzo-Annulated Bicyclo[2.2.2]octanes
作者:Randall H. Goldsmith、Josh Vura-Weis、Amy M. Scott、Sachin Borkar、Ayusman Sen、Mark A. Ratner、Michael R. Wasielewski
DOI:10.1021/ja8004623
日期:2008.6.18
A 4-(pyrrolidin-1-yl)phenyl electron donor and 10-cyanoanthracen-9-yl electron acceptor are attached via alkyne linkages to the bridgehead carbon atoms of bicyclo[2.2.2]octane and all three benzo-annulated bicyclo[2.2.2]octanes. The sigma-system of bicyclo[2.2.2]octane provides a scaffold having nearly constant bridge geometry on which to append multiple, weakly interacting benzo pi-bridges, so that
4-(吡咯烷-1-基)苯基电子供体和10-氰基蒽-9-基电子受体通过炔键连接到双环[2.2.2]辛烷和所有三个苯并环化双环[2.2的桥头碳原子.2]辛烷。双环 [2.2.2] 辛烷的 sigma 系统提供了一个具有几乎恒定桥几何形状的支架,在该支架上可以附加多个弱相互作用的苯并 pi 桥,因此递增数量的 pi 桥对电子转移速率的影响可以被研究。令人惊讶的是,通过甲苯中的瞬态吸收光谱法测量的光致电荷转移率显示增加桥 pi 系统的数量没有任何好处,这表明通过 sigma 系统的主要传输。更令人惊讶的是,由于苯并环化,sigma 系统经历的杂交的显着变化似乎也对电荷转移速率没有影响。自然键轨道分析适用于 sigma 和 pi 通信路径。在 2-甲基四氢呋喃 (MTHF) 中获得的瞬态吸收光谱表明,苯并环化分子之间存在微小差异,这归因于溶剂化的变化。将 MTHF 溶液冷却至玻璃态后,所有电荷转移速
Ultra-fast Rotors for Molecular Machines and Functional Materials via Halogen Bonding: Crystals of 1,4-Bis(iodoethynyl)bicyclo[2.2.2]octane with Distinct Gigahertz Rotation at Two Sites
作者:Cyprien Lemouchi、Cortnie S. Vogelsberg、Leokadiya Zorina、Sergey Simonov、Patrick Batail、Stuart Brown、Miguel A. Garcia-Garibay
DOI:10.1021/ja200503j
日期:2011.4.27
As a point of entry to investigate the potential of halogen-bondinginteractions in the construction of functional materials and crystallinemolecular machines, samples of 1,4-bis(iodoethynyl)bicyclo[2.2.2]octane (BIBCO) were synthesized and crystallized. Knowing that halogen-bondinginteractions are common between electron-rich acetylenic carbons and electron-deficient iodines, it was expected that
Provided is a process for the preparation of certain 1,4-bicyclo[2.2.2]octane derivatives. The new synthetic procedure involves treating 1,4-dimethylene cyclohexane with an oxidizing agent in the presence of a transition metal catalyst to afford an oxo-substituted bicyclo[2.2.2]octane species. This intermediate structure can then be further derivatized. The processes of this disclosure thus affords a novel and simplified means for the commercial production of a wide variety of bicyclo[2.2.2]octane derivatives.