2' and 4'-Substituted arylfurans react with DMAD in the presence of Lewis acid to afford Diels-Alder adducts with good yields; a subsequent spontaneous or an acid-induced β-elimination leads to polysubstituted phenylphenols.
2' 和 4'- 取代的芳香族
呋喃在
路易斯酸存在下与
DMAD 发生反应,生成产率很高的 Diels-Alder 加合物;随后通过自发或酸诱导的δ-消除反应生成多取代的
苯酚。