Synthesis of Naphthopyrans via Formal (3+3)-Annulation of Propargylic (Aza)-<i>para</i>-Quinone Methides with Naphthols
收藏NIAID Data Ecosystem2026-03-12 收录
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Herein, we report an efficient Brønsted acid-catalyzed formal (3+3)-annulation of (aza)-para-quinone methides generated in situ from propargylic alcohols with naphthol derivatives, which involves a 1,8-conjugate addition/6-endo annulation process. This protocol provides an effective method for preparing important functionalized pyranocoumarins under mild conditions.
创建时间：
2020-09-29
