quinone methide benzotropolone 13 was generated in situ by thermalisation of benzotropolone 10. Benzotropolone 10 was derived from phthalic acid via carbonyl ylide 8a followed by an intramolecular 1,3-dipolar cycloaddition and subsequent acid-catalyzed ring opening.
通过苯并马
酚10与腐殖烯的杂Diels-Alder反应,合成了马
酚酮
天然产物pycnidione和epolone B的类似物。
甲基苯醌苯并马
酚酮13是通过苯并马
酚酮10的热反应原位生成的。苯并马
酚酮10是通过羰基内酯8a从
邻苯二甲酸衍生而来的,然后进行分子内的1,3-偶极环加成反应,随后进行酸催化的开环反应。