An efficient and novelone-potsynthesis of 3,4,5-trisubstituted-3,6-dihydro-2H-1,3-oxazine from alkynoates, anilines, and formaldehyde is described. The six-membered N,O-heterocyclic skeleton was constructed via Brønsted acid-promoted domino hydroamination/Prins reaction/cyclization/dehydration reactions.
描述了一种高效,新颖的一锅合成法,从炔酸,苯胺和甲醛合成3,4,5-三取代-3,6-二氢-2 H -1,3-恶嗪。通过布朗斯台德酸促进的多米诺加氢胺化/ Prins反应/环化/脱水反应构建了六元的N,O杂环骨架。