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
摘要:苯并 [a] 蒽 (BA-0) 及其 1- (1-MBA-0)、4- (CMBA-0)、7- (7-MBA-0) 的 K 区芳烃氧化物的反应, 11-(1 1-MBA-0)、12-甲基-(I2-MBA-O)、7,12-二甲基-(DMBA-O)和7-溴-(7-BrBA-0)取代的衍生物,苯并[a]芘(BaP-0)、苯并[c]菲(BcP-0)、苯并[e]芘(BeP-0)、苯并[g]芘(BgC-0)、芘(Chr-0) 、二苯并 [a,h] 蒽 (DBA-0)、菲 (Phe-0)、3-溴菲 (3-BrPhe-0) 和芘 (Pyr-0) 与甲醇中的酸和甲醇离子进行了比较。对于酸催化反应,产物由顺式和反式甲醇加合物和酚类组成。当用氘代替迁移的氢时,对苯酚与由 Phe-0 或 BcP-0 产生的溶剂加合物的比率没有同位素影响。该观察结果与酸中产物分布由溶剂捕获和碳正离子中间体的构象反转的相对速率决