Department of Applied Chemistry , China Agricultural University , Beijing 100193 , P. R. China.
Org Lett. 2018 May 18;20(10):2939-2943. doi: 10.1021/acs.orglett.8b00990. Epub 2018 May 3.
An unprecedented [4 + 3] annulation reaction of aza- ortho-quinone methides with arylcarbohydrazonoyl chlorides has been achieved under mild conditions. The annulation underwent a sequential conjugate addition/intramolecular annulation/rearrangement, providing a useful method for the synthesis of biologically interesting 2,3-dihydro-1 H-benzo[ e][1,2,4]triazepine.
在温和条件下,实现了氮杂邻醌甲亚胺与芳基碳酰肼酰氯的空前的[4 + 3]环化反应。环化反应经历了顺序共轭加成/分子内环化/重排,为合成具有生物意义的 2,3-二氢-1 H-苯并[e][1,2,4]三嗪提供了一种有用的方法。