Treatment of syn-9-hydroxybicyclo[4.2.1]nona-2,4,7-triene (1) with fluorosulfonic acid in sulfur dioxidedichloromethane-d2 cleanly provided protonated dimeric ether and the 7-hydroxytricyclo[4.2.1.02,8]nona-3-en-5-yl cation. Direct NMR observation as well as quenching experiment of these cations unequivocally established protonation at C-2 (or C-5) and C-7 (or C-8) of 1.
在
二氧化硫二
氯甲烷-d2中用
氟磺酸处理syn-9-羟基双环[4.2.1]nona-2,4,7-triene (1)干净地提供质子化的二聚醚和7-羟基
三环[4.2.1.02,8]nona -3-en-5-yl 阳离子。这些阳离子的直接 NMR 观察以及猝灭实验明确地确定了在 C-2(或 C-5)和 C-7(或 C-8)为 1 的质子化。