一系列的三苯基甲基阳离子的z青类似物;合成了三(1-氮杂烯基)甲基阳离子,二(1-氮杂烯基)苯基甲基阳离子,(1-氮杂烯基)二苯基甲基阳离子及其甲基和甲氧基羰基衍生物。它们的p K R +值表明,这些阳离子的稳定性随a环的数目而急剧增加,而三(1-氮杂烯基)甲基阳离子(11.3)及其三甲基衍生物(11.4)的p K R +值最大。报道的最高水平是被烃基取代的甲基阳离子。
Azulene analogues of triphenylmethyl cation; extremely stable hydrocarbon carbocations
作者:Shunji Ito、Noboru Morita、Toyonobu Asao
DOI:10.1016/s0040-4039(00)74883-0
日期:1991.2
series of azulene analogues of triphenylmethyl cation; tri(1-azulenyl)methyl cation, di(1-azulenyl)phenylmethyl cation, (1-azulenyl)diphenylmethyl cation, and their methyl and methoxycarbonyl derivatives were synthesized. Their pKR+ values showed that the stability of these cations dramatically increases with the number of azulene rings, and the pKR+ values of tri(1-azulenyl)methyl cation (11.3) and
一系列的三苯基甲基阳离子的z青类似物;合成了三(1-氮杂烯基)甲基阳离子,二(1-氮杂烯基)苯基甲基阳离子,(1-氮杂烯基)二苯基甲基阳离子及其甲基和甲氧基羰基衍生物。它们的p K R +值表明,这些阳离子的稳定性随a环的数目而急剧增加,而三(1-氮杂烯基)甲基阳离子(11.3)及其三甲基衍生物(11.4)的p K R +值最大。报道的最高水平是被烃基取代的甲基阳离子。
Autoxidation of 1-Methyl- and 1,3-Dimethylazulenes in Polar Aprotic Solvents: Structural Proof for Products and Reaction Pathways
Autoxidation of the title azulenes at 100 °C in HMPA or DMF afforded a wide variety of products: Namely, the oxidation products of the side-chains, 1-substitutedazulenes, 1H-inden-1-ols, naphthoquinones, benzenoids, and dimeric and trimeric compounds, with or without rearrangements. 1H NMR (200-MHz) parameters of various azulene derivatives are given for comparative study. Possible reaction pathways for the
在 HMPA 或 DMF 中于 100 °C 自动氧化标题甘菊烯可提供多种产物:即,侧链的氧化产物、1-取代的甘菊烯、1H-inden-1-ols、萘醌、苯类和二聚体和三聚化合物,有或没有重排。给出了各种薁衍生物的 1 H NMR (200-MHz) 参数用于比较研究。与先前对愈创甘油醚和 4,6,8-trimethylazulene 的研究结果进行比较,讨论了形成这些产物的可能反应途径。
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