A Straightforward Approach to Substituted 2-(Hydroxymethyl)-2,3-dihydrofuro[2,3-b] pyridines and 3-Hydroxy-3,4-dihydro-2H-pyrano[ 2,3-b] pyridines

[摘要]：An efficient route to 2-(hydroxymethyl)-2,3-dihydrofuro[ 2,3-b]pyridines and 3-hydroxy-3,4-dihydro-2H-pyrano[2,3b]pyridines is reported. The strategy is based on an intramolecular inverse electron demand Diels-Alder reaction starting from 1,2,4-triazines. The hydroxy function comes from the glycidol ring opening with alkynyllithium or alkynylorganoalane.

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