作者:Juan C. Estevez、Antony J. Fairbanks、George W.J. Fleet
DOI:10.1016/s0040-4020(98)00837-0
日期:1998.10
Dehydration of both γ- and δ- hexonolactones, either by intramolecular nucleophilic displacement of triflate leaving groups at C-2, or by Mitsunobu type displacement of the OH-6, provides access to bicyclic lactones which contain tetrahydropyran rings. Reduction or nucleophilic ring opening of these bicyclic lactones furnishes polyfunctionalised tetrahydropyrans in good yield.
γ-和δ-己内酯的脱水,可以通过在C-2处的三氟甲磺酸酯离去基团的分子内亲核置换,或通过OH-6的Mitsunobu型置换来实现,可以得到含有四氢吡喃环的双环内酯。这些双环内酯的还原或亲核开环以良好的产率提供了多官能化的四氢吡喃。