作者:Américo Lemos、João Paulo Lourenço
DOI:10.1016/j.tetlet.2009.01.045
日期:2009.3
The generation of nitroso- and azo-alkenes and their [4+2] cycloaddition reactions with furan and ethyl vinyl ether, producing dihydro-1,2-oxazines and tetrahydropyridazines, by the use of catalytic Mg:Al 3:1 hydrotalcite, is described. The absence of an organic solvent, the catalytic quantities of Ht required together with its regeneration and reuse, may be regarded as environmentally friendly, greener
亚硝基-和偶氮-烯烃的生成及其与呋喃和乙基乙烯基醚的[4 + 2]环加成反应,通过使用催化Mg:Al 3:1水滑石生产二氢-1,2-恶嗪和四氢哒嗪。描述。与常规方法相比,不存在有机溶剂,所需催化量的Ht及其再生和再利用可被视为对环境友好,绿色环保且在经济上有利。