2-Deuterio-2'-carboxybiphenyl has been cyclized to fluorenone with sulfuric acid, polyphosphoric acid and anhydrous hydrogen fluoride. The isotope effects for these reactions have been determined. Hydrogen fluoride cyclization exhibited a kHKD of 3.02, whereas the other acid-catalyzed cyclizations had isotope effects in the range 1.13-1.46. The significance of these results is discussed with respect
2-Deuterio-2'-carboxybiphenyl 已用
硫酸、多
磷酸和无
水氟化氢环化为
芴酮。这些反应的同位素效应已经确定。
氟化氢环化的 kHKD 为 3.02,而其他酸催化环化的同位素效应范围为 1.13-1.46。这些结果的重要性就这些取代的可能机制进行了讨论。