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。