Reactive intermediates. Part VII. Oxidation of 3-aminobenzoxazolin-2-one; stereospecific addition of the amino-nitrene to olefins
作者:R. S. Atkinson、C. W. Rees
DOI:10.1039/j39690000772
日期:——
This nitrene does not fragment to benzyne, carbon dioxide, and nitrogen. It adds to olefins to give aziridines, and the addition is stereospecific even at high dilution. It also adds exclusively 1,2 to conjugated dienes to give vinylaziridines. Thus the nitrene appears to be generated in a resonance-stabilised singlet state, which is probably the ground state. With the formally similar nitrene from
苯并恶唑啉-2-酮与羟胺-O-磺酸反应生成N-氨基衍生物,该衍生物可通过四乙酸铅平稳地脱氢为氨基-丁二烯。该氮烯不会碎裂成苯,二氧化碳和氮。它添加到烯烃中生成氮丙啶,并且即使在高稀释度下添加也具有立体特异性。它也仅在共轭二烯中添加1,2,得到乙烯基氮丙啶。因此,似乎以共振稳定的单重态(可能是基态)生成了腈。但是,使用形式上与N-氨基-羟吲哚相似的腈,重排成3-cinnolinol的速度比与烯烃的反应快得多。N的核磁共振谱-苯并恶唑啉酮基氮丙啶是复杂的,表明氮丙啶氮的转化被大大延迟。