Synthesis of dibenzopyranones and pyrazolobenzopyranones through copper(0)/Selectfluor system-catalyzed double CH activation/oxygen insertion of 2-arylbenzaldehydes and 5-arylpyrazole-4-carbaldehydes
作者:Jian Zhang、Dongdong Shi、Haifeng Zhang、Zheng Xu、Hanyang Bao、Hongwei Jin、Yunkui Liu
DOI:10.1016/j.tet.2016.11.069
日期:2017.1
A mild and efficient protocol for the synthesis of dibenzopyranones and pyrazolobenzopyranones was developed involving a copper(0)/Selectfluor system-catalyzed double C-H activation/oxygen insertion of 2-arylbenzaldehydes and 5-arylpyrazole-4-carbaldehydes. Preliminary mechanistic studies suggest that both water and dioxygen act as the oxygen source in the formation of pyranone scaffolds. (C) 2016 Elsevier Ltd. All rights reserved.
Cycloaddition of diphenylnitrilimine to coumarins. The synthesis of 3a,9b-dihydro-4-oxo-1H-benzopyrano [4 ,3-c]pyrazole derivatives
作者:Ahmad S. Shawali、Bahgat E. Elanadouli、Hassan A. Albar
DOI:10.1016/s0040-4020(01)96550-0
日期:1985.1
SHAWALI, AHMAD, S.;ELANADOULI, BAHGAT, E.;ALBAR, HASSAN, A., TETRAHEDRON, 1985, 41, N 10, 1877-1884
作者:SHAWALI, AHMAD, S.、ELANADOULI, BAHGAT, E.、ALBAR, HASSAN, A.
DOI:——
日期:——
FATHI, TOUFIK;AN, NGUYEN DINH;SCHMITT, GERARD;CERUTTI, ERNEST;LAUDE, BERN+, TETRAHEDRON, 44,(1988) N 14, C. 4527-4536