The [3 + 2] cycloaddition of arynes with 3-oxidopyridinium species is examined using the Kobayashi benzyne precursor. The reaction affords a bicyclo[3.2.1] skeleton under mild conditions. A [7 + 2] cycloaddition mode with a subsequent pyridine ring-opening event has also been observed.
使用小林
苯炔前体研究了芳炔与3-
氧化
吡啶铵物种的[3 + 2]环加成反应。该反应在温和条件下产生了双环[3.2.1]骨架。此外,还观察到了一种[7 + 2]环加成模式,随之发生
吡啶环开环事件。