Syntheses of Azulene Analogues of Triphenylmethyl Cation: Extremely Stable Hydrocarbon Carbocations and the First Example of a One-Ring Flip as the Threshold Rotation Mechanism for Molecular Propellers
作者:Shunji Ito、Noboru Morita、Toyonobu Asao
DOI:10.1246/bcsj.68.1409
日期:1995.5
A series of azulene analogues of triphenylmethyl cation (tri(1-azulenyl)methyl, di(1-azulenyl)phenylmethyl, and (1-azulenyl)diphenylmethyl hexafluorophosphates) were synthesized by hydride abstraction from the corresponding methane derivatives with DDQ. In order to examine the effect of substituents on the cations, and to enhance their stabilities, a series of cations bearing 3-methyl, 3-methoxycarbonyl
Preparation of Azulene-Derived Fulvenedialdehydes and Their Application to the Synthesis of Stable <i>adj</i>-Dicarbaporphyrinoids
作者:Timothy D. Lash、Aaron D. Lammer、Aparna S. Idate、Denise A. Colby、Kristen White
DOI:10.1021/jo2026977
日期:2012.3.2
of an azuliporphyrin. Fulvene aldehydes were prepared by reacting an indene-derived enamine with azulene aldehydes in the presence of Bu2BOTf, and azulene dialdehydes similarly reacted to give fulvene dialdehydes. The dialdehydes were condensed with dipyrrylmethanes in TFA/dichloromethane to afford good to excellent yields of dicarbaporphyrinoids with adjacent indene and azulene subunits. These 22-carbaazuliporphyrins
Tris(3,6-di-t-butyl-1-azulenyl)methyl cation; hydrocarbon cation with the highest pKR+ value
作者:Shunji Ito、Noboru Morita、Toyonobu Asao
DOI:10.1016/s0040-4039(00)75808-4
日期:1994.1
Tris(3,6-di-t-butyl-1-azulenyl)methyl (5), tri(3-t-butyl-1-azulenyl)methyl (10), and tri(6-t-butyl-1-azulenyl)methyl (11) hexafluorophosphates were synthesized. Their pKR+ values were determined as 14.3, 13.2, and 13.7, respectively, and the value of 5 showed the highest one as carbocation ever reported. The extreme stability of methyl cation 5 is mainly attributable to steric effects of six bulky
三(3,6-二-吨-丁基-1-薁)甲基(5),三(3-吨丁基-1-薁)甲基(10),和三(6-吨丁基-1-薁合成了(11)甲基六氟磷酸酯。他们的p K R +值分别确定为14.3、13.2和13.7,而5的值显示出有史以来最高的碳正离子化值。甲基阳离子5的极度稳定性主要归因于六个庞大的叔丁基的空间效应,以及三个a环的偶极结构的贡献。
Synthesis of Expanded Porphyrinoids with Azulene and Indene Subunits and an <i>opp</i>-Dioxadicarbaporphyrin from Fulvene Carbinols and a Dioxacarbatripyrrin
作者:Timothy D. Lash、Stacy C. Fosu、Tyler J. Smolczyk、Deyaa I. AbuSalim
DOI:10.1021/acs.joc.8b01929
日期:2018.10.19
In an attempt to prepare quatyrin derivatives, which are hydrocarbon analogues of the porphyrins, azulene-appended fulvene carbinols were self-condensed in the presence of BF3·Et2O. Although these investigations failed to give structures related to quatyrin, expanded porphyrinanalogues were obtained instead. In dichloromethane, the major macrocyclic product consisted of three fulvene units, but when
为了制备四氢卟啉衍生物,它们是卟啉的烃类似物,在BF 3 ·Et 2 O存在的情况下,将带有氮丙烯的富马烯甲醇自缩合。尽管这些研究未能给出与四氢卟啉有关的结构,但扩大了卟啉类似物取而代之。在二氯甲烷中,主要的大环产物由三个富烯单元组成,但是当使用氯仿作为反应溶剂时,会分离出一个四氟烯大环。呋喃附加的富勒烯醇的自缩合产生痕量的opp-二恶二卡巴卟啉。开发了该新颖系统的替代途径,其中在HBr存在下将二氧杂碳三环戊酸酯与茚二醛缩合。经1 H NMR光谱,感应电流密度的各向异性和NICS计算评估,杂二碳杂卟啉类化合物具有较强的整体芳香性。在过量的三氟乙酸存在下,通过茚亚基的C-质子化反应形成不稳定的芳族阳离子。该物种也具有高度变渗性,1 H NMR光谱显示出异常高的Δδ值17.46 ppm。
Stimuli-responsive emissive behavior of 1- and 1,3-connectivities in azulene-based imine ligands: cycloplatination and Pt–Tl dative bond formation
cyclometalated complex [PtMe(SMe2)(3′)], 5, (where the prime denotes the cyclometalated ligand 3). The reaction of 5 with TlPF6 yields the trinuclear bent Pt2Tl complex [PtMe(SMe2)(3′)]2(μ-Tl)}PF6, 6, via Pt–Tl dative bonds. The compounds 3–6 were characterized using NMR spectroscopy and the solid-state structures of 5 and 6 were further determined by X-ray crystallography. The electronic absorption spectra
制备两个新的基于z烯的亚胺配体N-(2,6-二异丙基苯基)-6- t Bu-1-氮烯基甲烷亚胺3和N-(2,6-二异丙基苯基)-6- t Bu-3-(描述了2,6-二异丙基苯基亚氨基甲基)-1-氮烯基甲烷亚胺4。这些亚胺配体显示出刺激响应的发光行为,并且它们的荧光可以分别通过质子化和用三氟乙酸和三甲胺中和来打开和关闭。单亚胺配体被铂环金属化,得到环金属化的配合物[PtMe(SMe 2)(3')] 5,(其中素数表示环金属化的配体3)。的反应5与TlPF 6产率的三核弯曲的Pt 2铊复杂[PTME(SME 2)(3')] 2(μ-T1)的PF} 6,6,通过铂-铊配价键。使用NMR光谱对化合物3–6进行了表征,并通过X射线晶体学进一步确定了化合物5和6的固态结构。3-H +,4-H +,5和6物质的电子吸收光谱获得并与亲本3和4观察到的进行比较。DFT和TD-DFT计算用于阐明单亚胺配体3及其质子化形式3-H