Synthesis of fluorinated 1,2,4-oxadiazin-6-ones through ANRORC rearrangement of 1,2,4-oxadiazoles
作者:Antonio Palumbo Piccionello、Andrea Pace、Silvestre Buscemi、Nicolò Vivona、Gianluca Giorgi
DOI:10.1016/j.tetlet.2009.01.071
日期:2009.4
gelation ability. In turn, reactions with N-methylhydroxylamine lead the exclusive formation of 4-perfluoroacylamino-2-methyl-2H-1,2,5-oxadiazol-3-ones through the well known Boulton–Katritzky rearrangement.
已经研究了3-乙氧基羰基-5-全氟烷基-1,2,4-恶二唑与羟胺的反应,证明了竞争反应路径的可能性。羟基胺向1,2,4-恶二唑环的亲电C(5)亲核加成,然后开环和闭环扩大,导致高收率,并在非常温和的实验条件下形成5-羟基氨基-3-全氟烷基-6 H -1,2,4-恶二嗪-6-one,其中之一具有水凝胶能力。反过来,与N-甲基羟胺的反应通过众所周知的Boulton-Katritzky重排导致4-全氟酰基氨基-2-甲基-2 H -1,2,5-恶二唑-3-酮的排他性形成。