An efficient strategy for the synthesis of functionalised 2,3-dihydrofuro[2,3-b]pyridines and 3,4-dihydro-2H-pyrano[2,3-b]pyridines is reported. The strategy is based on an intramolecular inverse-electron-demand Diels-Alder reaction starting from 1,2,4-triazines appropriately functionalised with alkynes, followed by various cross-coupling reactions (Suzuki, Stille, and Sonogashira).
报告了一种合成功能化 2,3-二氢
呋喃并[2,3-b]吡啶和
3,4-二氢-2H-吡喃并[2,3-b]吡啶的高效策略。该策略基于分子内反电子需求 Diels-Alder 反应,以
1,2,4-三嗪为起点,适当地与
炔烃进行官能化,然后进行各种交叉耦合反应(Suzuki、Stille 和 Sonogashira)。