Inverse electron demand Diels-Alder reactions of ethoxyethene with heterocyclic aldehydes afforded a mixture of cycloadducts and vinyl compounds resulting from a competing [2+2] pathway.
Swernoxidation of saturated (1,4-benzoxazine-2-yl)-methanols 2 furnished 4H-1,4-benzoxazine-2-carbaldehydes 3, which possess an α,β ethylenic bond. The reactivity of these compounds was examined.
饱和(1,4-苯并恶嗪-2-基)-甲醇2的剧烈氧化提供4 H -1,4-苯并恶嗪-2-甲醛3,它们具有α,β烯键。检查了这些化合物的反应性。