作者:Ahmet E. Baydar、Gerhard V. Boyd、Peter F. Lindley、Frank Watson
DOI:10.1039/c39790000178
日期:——
Whereas N-phenylmaleimide and 6-morpholino-5-phenyl-1,3-oxazin-2-one (1) yield the pyridine derivative (3) by a Diels–Alder reaction, the action of 1-diethylaminopropyne on the oxazinone results in the isomeric adducts (5) and (9), which are thought to be formed by initial 1,4- and 1,2-cycloaddition, respectively, of the ynamine to the acyclic valence isomer (4) of the oxazinone; the 1,2-cycloadduct
而Ñ苯基马来和6-吗啉代-5-苯基-1,3-恶嗪-2-酮(1)得到的吡啶衍生物(3通过Diels-Alder反应,1- diethylaminopropyne对在恶嗪酮结果的动作)异构体加合物(5)和(9),被认为分别是由乙胺的初始1,4-环和1,2-环加成到恶嗪酮的无环价异构体(4)上形成的;1,2-环加合物通过一系列周环反应重排成最终产物。