1266239-30-8Relevant articles and documents
Synthesis of quinoxalines through iodine-catalyzed one-pot annulation of alkynes with o-phenylenediamines
Zi, Jing,Gu, Da-Wei,Zhang, Yan,Hu, Zhe-Yao,Zhang, Xing-Quan,Guo, Xun-Xiang
, p. 915 - 920 (2018)
The synthesis of N-heterocycles of quinoxalines has been developed by an efficient protocol of one-pot annulation of alkynes with o-phenylenediamines. A variety of quinoxalines were prepared in good to high yields in the presence of catalytic amount of iodine as a catalyst.
Elemental iodine or diphenyl diselenide in the [bis(trifluoroacetoxy)iodo] benzene-mediated conversion of alkynes into 1,2-diketones
Tingoli, Marco,Mazzella, Mauro,Panunzi, Barbara,Tuzi, Angela
experimental part, p. 399 - 404 (2011/02/28)
Both elemental iodine and diphenyl diselenides, in the presence of [bis(trifluoroacetoxy)iodo]benzene (PIFA), promote the transformation of internal alkynes into the corresponding 1,2-diketones. The reactions carried out in the presence of iodine unfortunately did not proceed with complete conversion of the starting alkynes. On the other hand, diphenyl diselenide was more efficient and gave satisfactory transformation of the starting alkynes into 1,2-diketones in better yields. The structure of the vicinal dicarbonyl compounds were confirmed by applying a subsequent condensation reaction to construct the corresponding quinoxaline derivatives. Both elemental iodine and diphenyl diselenide in the presence of [bis(trifluoroacetoxy)iodo]benzene (PIFA) promote the transformation of internal alkynes into 1,2-diketones. The structure of the products were confirmed by transformation into the corresponding quinoxaline derivatives, two of which were studied by X-ray analysis. Copyright
