Facile Synthesis of 6-Trichloromethylpterin and 2-Chloro-3-trichloromethylquinoxaline along with a Library of Trichloromethyl Heterocycles Using<i>N</i>-Chlorosuccinimide and Triphenyl Phosphine
作者:Shyamaprosad Goswami、Annada C. Maity、Hoong-Kun Fun
DOI:10.1246/cl.2007.552
日期:2007.4.5
A general synthesis of 6-trichloromethylpterin, 2-chloro-3-trichloromethylquinoxaline and 2-amino-7-trichloromethyl-1,8-naphthyridine along with a series of trichloromethyl heterocycles (1–11) has been reported in one-pot mild neutral condition in good yield. This method is compared with the usual method using phosphorus pentachloride in phosphorus oxychloride.
Oxidative Removal of Heterocyclic Alkyl or Sugar Side Chain by Microwave: A Simple Step to Xanthopterin, 6-Formylpterin, and 3-Hydroxymethyl-2(1<i>H</i>)-quinoxalinone
作者:Shyamaprosad Goswami、Annada C. Maity
DOI:10.1246/cl.2007.1118
日期:2007.9.5
One-step microwave-assisted oxidative removal of 3-methyl and 3-sugar side chain in 2(1H)-quinoxalinone system by selenium dioxide and sodium periodate respectively resulting 2(1H)-quinoxalinone ha...
Heterocyclizations in the pyrido[2,3-<i>b</i>]pyrazine series
作者:Y. Blache、A. Gueiffier、O. Chavignon、J. C. Teulade、J. C. Milhavet、H. Viols、J. P. Chapat、G. Dauphin
DOI:10.1002/jhet.5570310127
日期:1994.1
the results of heterocyclizations in the pyrido[2,3-b]pyrazine series to give the pyrido[2,3-e] or [3,2-e]pyrrolo[1,2-a]pyrazine. The Clauson-Kaas reaction on 2,3-diaminopyridine is investigated; regioselectivity on the 3-amino group is shown by 1H- and 13C-nmr. Synthesis and reactivity of the original pyrazino[2,3-g]indolizine series is also reported.
在本文中,我们报告了吡啶并[2,3- b ]吡嗪系列中杂环化的结果,从而得到了吡啶并[2,3- e ]或[3,2- e ]吡咯并[1,2- a ]吡嗪。研究了2,3-二氨基吡啶上的克劳森-卡斯反应。3-氨基上的区域选择性由1 H-和13 C-nmr表示。还报道了原始吡嗪并[2,3- g ]吲哚嗪系列的合成和反应性。
Dubey; Kulkarni; Vinod Kumar, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 2001, vol. 40, # 5, p. 361 - 367