Amide-Directed C−H Sodiation by a Sodium Hydride/Iodide Composite
作者:Yinhua Huang、Guo Hao Chan、Shunsuke Chiba
DOI:10.1002/anie.201702512
日期:2017.6.1
A new protocol for amide-directed ortho and lateral C-H sodiation is enabled by sodiumhydride (NaH) in the presence of either sodium iodide (NaI) or lithium iodide (LiI). The transient organosodium intermediates could be transformed into functionalized aromatic compounds.
Acid-catalyzed rearrangement of K-region arene oxides: observation of ketone intermediates and a sterically induced change in rate-determining step
作者:Nashaat T. Nashed、Jane M. Sayer、Donald M. Jerina
DOI:10.1021/ja00058a016
日期:1993.3
K-regionareneoxides rearrange to phenols in acetonitrile in two acid-catalyzed steps: rapid rearrangement of the areneoxide to positionally isomeric keto tautomers of K-region phenols, followed by slow enolization. Accumulation of the ketones, proposed intermediates in the acid-catalyzed solvolyses of areneoxides in aqueous solution, allowed their direct spectroscopic observation and characterization
K 区芳烃氧化物在乙腈中通过两个酸催化步骤重排为苯酚:将芳烃氧化物快速重排为 K 区苯酚的位置异构酮互变异构体,然后缓慢烯醇化。酮的积累是水溶液中芳烃氧化物的酸催化溶剂分解中提出的中间体,首次允许在溶剂分解条件下直接进行光谱观察和表征。报告了苯并 [a] 蒽的 K 区芳烃氧化物、其 1-、4-、7-、11-、12-甲基和 7,12-二甲基取代衍生物苯并 [a] 的速率常数和产物芘、苯并[c]菲、3-溴菲、屈、二苯并[a,h]蒽、菲和芘
Methanolysis of K-region arene oxides: comparison between acid-catalyzed and methoxide ion addition reactions
作者:Nashaat T. Nashed、Ad Bax、Richard J. Loncharich、Jane M. Sayer、Donald M. Jerina
DOI:10.1021/ja00058a015
日期:1993.3
kH/kH-) + b, where kMd and kH are the second-order rate constants of the methoxide ion addition and acid-catalyzed reaction, respectively, and kM~Phc-o and kHPbe-O are the corresponding rate constants for the reference compound phenanthrene oxide. A plot of log kMso/kMsoM vs log kH/kHPhbO for the reaction of l-MBA-O,12-MBA-O, DMBA-0, BcP-0, and BgC-0, which have either a methyl substituent in the bay