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。
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