作者:Masakazu Ohkita、Kieko Sano、Katsuhiko Ono、Katsuhiro Saito、Takanori Suzuki、Takashi Tsuji
DOI:10.1039/b408393h
日期:——
Kinetic stabilization of the o-quinoidal 3,4-benzotropone system was investigated. The parent 3,4-benzotropone 1 undergoes rapid [π8 +
π10] dimerization in fluid solution even at −78 °C while triptycene-fused derivative 5 having a tert-butyl group at the C(6) position of the tropone moiety was found to be stable indefinitely under similar conditions. The relative importance of the triptycene moiety and the tert-butyl group in 5 for the kinetic stabilization was evaluated.
研究了邻醌型 3,4-苯并托品体系的动力学稳定性。母体 3,4-苯并托品 1 在流体溶液中,即使在 -78 °C 下也会迅速发生 [π8 + π10] 二聚化,而在类似条件下,在托品酮分子的 C(6) 位上具有叔丁基的三庚烯融合衍生物 5 则无限稳定。对 5 中的三庚烯分子和叔丁基在动力学稳定方面的相对重要性进行了评估。