Electrophilic Chemistry of Thia-PAHs: Stable Carbocations (NMR and DFT), S-Alkylated Onium Salts, Model Electrophilic Substitutions (Nitration and Bromination), and Mutagenicity Assay
作者:Kenneth K. Laali、Joong-Hyun Chun、Takao Okazaki、Subodh Kumar、Gabriela L. Borosky、Carol Swartz
DOI:10.1021/jo701502y
日期:2007.10.1
from several classes of thia-PAHs with four fused rings, namely, benzo[b]naphtho[2,1-d]thiophene (1) and its 3-methoxy derivative (2), phenanthro[4,3-b]thiophene (3) and its 7-methoxy (4), 10-methoxy (5), and 9-methoxy (6) derivatives, phenanthro[3,4-b]thiophene (7) and its 7-methoxy (8) and 9-methoxy (9) derivatives, and 3-methoxybenzo[b]naphtha[1,2-d]thiophene (11). In several cases, the resulting carbocations
从具有四个稠环的几类硫杂多环芳烃中报道了稳定碳正离子的第一个例子,即苯并[ b ]萘并[2,1- d ]噻吩 ( 1 ) 及其 3-甲氧基衍生物 ( 2 ),菲 [4 ] ,3- b ]噻吩( 3 )及其7-甲氧基( 4 )、10-甲氧基( 5 )和9-甲氧基( 6 )衍生物、菲[3,4- b ]噻吩( 7 )及其7-甲氧基 ( 8 ) 和 9-甲氧基 ( 9 ) 衍生物,以及 3-甲氧基苯并[ b ] 萘[1,2- d ] 噻吩 ( 11)。在一些情况下,GIAO-DFT 还研究了由此产生的碳正离子。探测了所得碳正离子中的电荷离域模式。一系列S-烷基化的四氟硼酸鎓,即1Me +, 1Et +, 2Et +, 和7Me +(从1、2和7),10Me +和10Et +(来自苯并[ b ]石脑油[1,2- d ]噻吩10 ), 12Me +和12Et +(来自菲 [3,2- b ][1] 苯并噻吩12),13Me