作者:Yu-Chao Wang、Jin-Biao Liu、Hongwei Zhou、Wenlin Xie、Pornchai Rojsitthisak、Guanyinsheng Qiu
DOI:10.1021/acs.joc.9b02590
日期:2020.2.21
A facile protocol for the tunable synthesis of 10-hydroxy-1-azaspiro[4.5]deca-3,6,8-trien-2-ones and benzo[b]pyrrolo[2,1-c][1,4]oxazin-3-ones is described. A tunable synthesis has been realized by the use of ZnBr2/oxone and tetra-n-butylammonium bromide (TBAB)/oxone. The reaction proceeds smoothly with high efficiency and a broad substrate scope. Mechanistic studies indicate that an N-protecting group-assisted
可调谐合成10-羟基-1-azaspiro [4.5] deca-3,6,8-trien-2-ones和苯并[b]吡咯并[2,1-c] [1,4]恶嗪的简便方法描述了-3-ones。通过使用ZnBr2 / oxone和四正丁基溴化铵(TBAB)/ oxone已经实现了可调谐的合成。该反应以高效率和广泛的底物范围顺利进行。机理研究表明,涉及N保护基辅助的邻陷反应。在转化中,反应经历α-加成,ipso-环化和所得螺环物种的邻位捕获。