Solvolysis of K-region arene oxides: substituent effects on reactions of benz[a]anthracene 5,6-oxide
作者:Nashaat T. Nashed、Suresh K. Balani、Richard J. Loncharich、Jane M. Sayer、David Y. Shipley、Ram S. Mohan、Dale L. Whalen、Donald M. Jerina
DOI:10.1021/ja00010a036
日期:1991.5
dioxane-water and in methanol at 25 o C are reported. These substitutions result in >150-fold differences in their rates of acid-catalyzed solvolysis and cause marked changes in the distribution of solvent adducts and phenols resulting from isomerization. Optically pure BA-O, 7-MBA-O, 12-MBA-O, and 7,12-DMBA-O as well as their optically pure trans dihydrodiols were utilized to determine the point of attack by
Charge Delocalization in Persistent Benz[<i>a</i>]anthracenium Cations BAH<sup>+</sup> and Related α-Carbocations/Carboxonium Ions: Modeling Epoxide Ring Opening in Potent Carcinogens
作者:Kenneth K. Laali、Mutsuo Tanaka
DOI:10.1021/jo980722x
日期:1998.10.1
overtime in favor of 3aH(+)() (ipso-attack at bay-region), showing it to be the thermodynamic cation. 3-Methylcholanthrene, 3MC, is exclusively protonated at C-6 (-->4aH(+)()). Cation 5(+)() (a simplified model for bay-region epoxide ring opening) is cleanly formed via its carbinol 5-OH with FSO(3)H/SO(2)ClF. Ketone 6 is O-protonated in TFAH and in TFAH/H(2)SO(4) to give the bay-region carboxonium ion 6H(+)();