One pot three-component regioselective and diastereoselective synthesis of halogenated pyrido[2,1-b][1,3]oxazines
作者:Sakineh Asghari、Ahmad Khabbazi Habibi
DOI:10.1016/j.tet.2012.08.038
日期:2012.10
of 3-substituted pyridines, dimethyl acetylenedicarboxylate (DMAD), and α-halo ketones led to regioselective and stereoselective synthesis of pyrido[2,1-b][1,3]oxazines in high to excellent yields under mild conditions. All the reactions gave the pyrido[2,1-b][1,3]oxazine derivatives without formation of any indolizine products.
3-取代的吡啶,乙炔二甲酸二甲酯(DMAD)和α-卤代酮的三组分反应导致在温和条件下以高产率至优异产率进行吡啶并[2,1- b ] [1,3]恶嗪的区域选择性和立体选择性合成。所有反应得到吡啶并[2,1- b ] [1,3]恶嗪衍生物,而没有形成任何吲哚嗪产物。