Stable Alkanes Containing Very Long Carbon–Carbon Bonds
作者:Andrey A. Fokin、Lesya V. Chernish、Pavel A. Gunchenko、Evgeniya Yu. Tikhonchuk、Heike Hausmann、Michael Serafin、Jeremy E. P. Dahl、Robert M. K. Carlson、Peter R. Schreiner
DOI:10.1021/ja302258q
日期:2012.8.22
diamondoid bromides gave highly sterically congested hydrocarbon (hetero)dimers with exceptionally long central C-C bonds of up to 1.71 Å in 2-(1-diamantyl)[121]tetramantane. Yet, these dimers are thermally very stable even at temperatures above 200 °C, which is not in line with common C-C bond length versus bond strengths correlations. We suggest that the extraordinary stabilization arises from numerous
叔金刚石溴化物的金属诱导偶联产生高度空间拥挤的烃(杂)二聚体,在 2-(1-二金刚烷基)[121]四金刚烷中具有高达 1.71 Å 的超长中心 CC 键。然而,这些二聚体即使在高于 200 °C 的温度下也非常稳定,这与常见的 CC 键长与键强度的相关性不一致。我们认为这种非凡的稳定性源于相邻的 H 端接金刚石状表面之间的众多分子内范德华引力。1-(1-金刚烷基)二金刚烷、1-(1-金刚烷基)二金刚烷、2-(1-金刚烷基)三金刚烷、2-(1-二金刚烷基)三金刚烷和2-(1-二金刚烷基)的CC键旋转动力学[121]四金刚烷通过变温(1)H-和(13)C NMR光谱进行了研究。向内 (endo) CH 表面的形状决定了动态行为,将中央 CC 键旋转障碍从 7 更改为 33 kcal mol(-1)。我们用 6-31G(d,p) 探讨了流行的密度泛函理论 (DFT) 方法(包括 BLYP、B3L
Diamondoid derivatives possessing therapeutic activity in the treatment of neurologic disorders
申请人:Liu Shenggao
公开号:US20080009546A1
公开(公告)日:2008-01-10
This invention relates to diamondoid derivatives which exhibit therapeutic activity. Specifically, the diamondoid derivatives herein exhibit therapeutic effects in the treatment of neurologic disorders. Also provided are methods of treatment, prevention and inhibition of neurologic disorders in a subject in need.
Selective Preparation of Diamondoid Fluorides<sup>[1]</sup>
作者:Hartmut Schwertfeger、Christian Würtele、Heike Hausmann、Jeremy E. P. Dahl、Robert M. K. Carlson、Andrey A. Fokin、Peter R. Schreiner
DOI:10.1002/adsc.200800787
日期:2009.5
Abstractmagnified imageThe selective fluorination of diamantane, triamantane, [121]tetramantane, and [1(2,3)4]pentamantane bromides and alcohols was achieved by using the fluorinating agents silver fluoride (AgF) and diethylaminosulfur trifluoride (DAST). Various mono‐, di‐, tri‐ and even tetrafluorinated diamondoid derivatives were prepared and characterized. We were also able to prepare the amino fluoro and the fluoro alcohol derivatives of diamantane from the corresponding monoprotected diamondoid diols. These reactions can be carried out in a highly selective manner and proceed without isomerizations. The fluorinated, unequally disubstituted derivatives are valuable compounds for the exploration of electronic, pharmacological, and material properties of functionalized diamondoids.
Synthesis of triamantane
作者:Fredric S. Hollowood、M. Anthony McKervey、Robert Hamilton、John J. Rooney
DOI:10.1021/jo01312a026
日期:1980.11
HOLLOWOOD F. S.; MCKERVEY M. A.; HAMILTON R.; ROONEY J. J., J. ORG. CHEM., 1980, 45, NO 24, 4954-4958
作者:HOLLOWOOD F. S.、 MCKERVEY M. A.、 HAMILTON R.、 ROONEY J. J.