Generation and reactivity of<i>N,N</i>-dimethylaminobenzotriazolylcarbene a new nucleophilic carbene
作者:Alan R. Katritzky、Dai Cheng、Peter Leeming、Ion Ghiviriga、Chris M. Hartshorn、Peter J. Steel
DOI:10.1002/jhet.5570330662
日期:1996.11
N,N-Dimethylaminobenzotriazolylcarbene (5) reacted with phenyl isocyanate in a [1+2+2] cycloaddition and then with nucleophiles to generate various hydantoins 10 in a one-pot procedure. It was also found that this novel carbene reacted with trans-dibenzoylethylene (11) in a [1+4] cycloaddition, generating 2-dimethylamino-3-benzoyl-5-phenylfuran (13) and 2-phenyl-3-[benzotriazol-1-yl]-4-benzoylfuran
N,N-二甲基氨基苯并三唑基卡宾(5)与异氰酸苯酯在[1 + 2 + 2]环加成反应中,然后与亲核试剂反应,以一锅法生成各种乙内酰脲10。还发现该新型卡宾在[1 + 4]环加成中与反式-二苯甲酰基乙烯(11)反应,生成了2-二甲基氨基-3-苯甲酰基-5-苯基呋喃(13)和2-苯基-3- [苯并三唑-通过1 H- 13 C长程相关性确认了结构的1-yl] -4-苯甲酰基呋喃(14)以及通过X射线晶体学确认了呋喃14的结构。