On the Thermal Stability of [60]Fullerene Cycloadducts: Retro-Cycloaddition Reaction of 2-Pyrazolino[4,5:1,2][60]fullerenes
作者:Juan Luis Delgado、Frédéric Oswald、François Cardinali、Fernando Langa、Nazario Martín
DOI:10.1021/jo702741n
日期:2008.4.1
2-Pyrazolino[4,5:1,2][60]fullerenes undergo a thermally induced retro-cycloaddition process whose efficiency is influenced by the nature of the C-substituent. C-Aryl-N-Aryl-2-pyrazolino[60]fullerenes (2a−d) poorly undergo a thermal retro-cycloaddition reaction even in the presence of a strong dipolarophile or a metal Lewis acid which, in contrast to other fullerene derivatives, shows their remarkable
2-吡唑啉代[4,5:1,2] [60]富勒烯经历热诱导的逆环加成过程,其效率受C取代基的性质影响。C-芳基-N-芳基-2-吡唑啉基[60]富勒烯(2a - d)即使在强双极性亲和剂或金属路易斯酸(与其他富勒烯衍生物相比,显示出其卓越的热稳定性。C-烷基-N-芳基-2-吡唑啉[60]富勒烯(2e - f)表现出不同的行为,更容易受到三氟甲磺酸铜的影响,并导致高收率的逆环加成产物(原始C 60)。