An efficient and mild ortho-zincation of aromatics and heterocycles by using TMP2Mg·2LiCl in the presence of ZnCl2
摘要:
A variety range of functionalized aryl and heteroaryl zinc reagents were efficiently generated by using TMP2Mg center dot 2LiCl (TMP = 2,2,6,6-tetramethylpiperamidyl) in the presence of ZnCl2. The subsequently functionalization gave after reaction with electrophiles the expected polyfunctionalized products in good yields. A detailed study concerned on the point how we found the protocol and how we optimized it was depicted. (C) 2009 Elsevier B.V. All rights reserved.
Bromination of quinoxaline and derivatives: Effective synthesis of some new brominated quinoxalines
作者:Sefa Uçar、Selçuk Eşsiz、Arif Daştan
DOI:10.1016/j.tet.2017.02.014
日期:2017.3
The synthesis of brominated quinoxaline derivatives starting from several kinds of quinoxaline by different bromination strategies was studied. First the synthesis of some brominated quinoxalines was accomplished along with the development of an alternative and effective synthesis of some known compounds. A new, clean, and effective synthetic method for selective reduction of quinoxaline to 1,2,3,