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
Hydroxy Derivatives of Diamantane, Triamantane, and [121]Tetramantane: Selective Preparation of Bis-Apical Derivatives
作者:Natalie A. Fokina、Boryslav A. Tkachenko、Anika Merz、Michael Serafin、Jeremy E. P. Dahl、Robert M. K. Carlson、Andrey A. Fokin、Peter R. Schreiner
DOI:10.1002/ejoc.200700378
日期:2007.10
Functionalizations of diamantane, triamantane, and tetramantane with electrophilic reagents (Br2, nitric acid) lead to various apical and medial disubstituted products that were separated and characterized individually. The highly desirable and otherwise inaccessible thermodynamically more stable apical bis-derivatives were obtained with high preparative yields through acid catalyzed isomerizations
Some comments on the thermal stability of substituted ammonium, phosphonium, and arsonium permanganates and their use in alkane oxidation
作者:Bernard P. Leddy、M.Anthony McKervey、Peter McSweeney
DOI:10.1016/0040-4039(80)80019-0
日期:1980.1
Tetraethyl- and tetrabutylammonium permanganate are less prone to explosive decomposition when heated than are benzyl(triethyl)ammonium and methyl-(triphenyl) phosphonium permanganate and are about equally effective as oxidants for the conversion of alkanes into alcohol and ketones.
作者:Frederick Hollowood、Amna Karim、M. Anthony McKervey、Peter McSweeney、Helmut Duddeck
DOI:10.1039/c39780000306
日期:——
The C18H24 diamondoid hydrocarbon triamantane reacts with bromine largely at the 2-position and with lead tetrabenzoate largely at the 3-position; 2-bromotriamantane can be isomerised to 9-bromotriamantane and the 9-methyl derivative can be obtained directly from a C19H26 precursor by aluminium chloride-catalysed rearrangement.
C 18 H 24类金刚石烃三金刚烷在2位与溴大量反应,在3位与四苯甲酸铅大量反应;可以将2-溴三金刚烷异构化为9-溴三金刚烷,并且可以通过氯化铝催化的重排直接从C 19 H 26前体获得9-甲基衍生物。
Synthetic Routes to Aminotriamantanes,
Topological Analogues of the Neuroprotector Memantine<sup>®</sup>
The amino derivatives of diamantane and triamantane, representing close topological analogues of the neuroprotective drug Memantine®, were prepared via amination of the respective carboxylic acids or alcohols. amines - diols - drugs - hydrocarbons - medicinal chemistry