作者:W.J. Middleton
DOI:10.1016/s0022-1139(00)85496-2
日期:1983.11
New syntheses of perfluoroalkyl isocyanates (1) include pyrolysis of dioxazolones (2) and pyrolysis of disilyl esters of hydroxamic acids (3). Reactions of 1 with alkyl isocyanides give the unusual diiminooxiranes 4. Trifluoroacetonitrile oxide (5), an unstable isomer of CF3NCO, is conveniently prepared from NH2OH·HCl, PCl5 and trifluoroacetic anhydride. It can be dimerized to give either the expected
全氟烷基异氰酸酯的新合成方法(1)包括二恶唑酮的热解(2)和异羟肟酸二甲硅烷基酯的热解(3)。1与烷基异氰酸酯的反应会生成不同寻常的二亚氨基肟基4。三氟乙腈氧化物(5)是CF 3 NCO的不稳定异构体,可以方便地由NH 2 OH·HCl,PCl 5和三氟乙酸酐制备。可以将其二聚以得到预期的呋喃二聚体6或不寻常的二恶二嗪二聚体7与苄腈反应形成环加成产物,并以立体有择的方式添加亲核试剂以生成肟。