Confirmation and prevention of halogen exchange: practical and highly efficient one-pot synthesis of dibromo- and dichloropyridazinones
摘要:
Commercially available anilines were converted by a two step, one-pot process to the corresponding pyridazinones in good to excellent yields. During the process research, a significant halogen exchange was confirmed and prevented which allowed the process to be scaled to multikilogram quantities. (c) 2006 Elsevier Ltd. All rights reserved.
作者:Jeum-Jong Kim、Yong-Dae Park、Su-Dong Cho、Ho-Kyun Kim、Hyun A. Chung、Sang-Gyeong Lee、J.R. Falck、Yong-Jin Yoon
DOI:10.1016/j.tetlet.2004.10.003
日期:2004.11
A variety of substituted pyridazin-3(2H)-ones are directly N-arylated in good yield using lead tetraacetate/zinc chloride in benzene or in substituted benzenes including chloro- and bromobenzene. (C) 2004 Elsevier Ltd. All rights reserved.