作者:Naoto Hayashi、Hiroyuki Nakagawa、Yuko Sugiyama、Junro Yoshino、Hiroyuki Higuchi
DOI:10.1246/cl.121244
日期:2013.4.5
A p-chloranil dimer (pCh2) has been synthesized. The first reduction potential of pCh2 shifted to a more positive value than that observed for the p-chloranil monomer (pCh1) and was more negative than that for 2,3-dichloro-5,6-dicyano-p-benzoquinone (DDQ). As expected, pCh2 oxidized 9,10-dihydroanthracene and α-tetralol to give anthracene and α-tetralone, respectively, more efficiently than pCh1 did. The advantages of pCh2 were observed in oxidations of 2,4-di-tert-butylphenol and 2,6-di-tert-butyl-4-methylphenol. Although further oxidation took place in DDQ oxidations and no reaction occurred in pCh1 oxidations, initial oxidation products were solely obtained in pCh2 oxidation because of its moderate oxidizing ability.
合成了一种p-氯醌二聚体 (pCh2)。pCh2的第一还原电位比p-氯醌单体 (pCh1) 观测到的值更正,并且比2,3-二氯-5,6-二氰基-p-苯醌 (DDQ) 的值更负。正如预期的那样,pCh2比pCh1更有效地将9,10-二氢蒽和α-四氢萘醇分别氧化为蒽和α-四氢萘酮。在氧化2,4-二叔丁基苯酚和2,6-二叔丁基-4-甲基苯酚时,观察到了pCh2的优势。尽管在DDQ氧化中发生了进一步氧化,而pCh1氧化中没有反应发生,但由于其中等氧化能力,pCh2氧化中仅获得了初步氧化产物。