Solvent-free enantioselective conjugate addition and bioactivities of nitromethane to Chalcone containing pyridine
作者:Guoping Zhang、Chun Zhu、Dengyue Liu、Jianke Pan、Jian Zhang、Deyu Hu、Baoan Song
DOI:10.1016/j.tet.2016.11.063
日期:2017.1
catalysts in the enantioselective Michael additions of nitromethane to α,β-unsaturated ketones containing pyridine. The best results were obtained with the bifunctional catalyst prepared from 3,5-di(trifluoromethyl)-aniline under solvent-free conditions. This thiourea promoted the reaction with high enantioselectivities and chemical yields for aryl ketones. The origins of enantioselectivity were further
测试了一系列来自奎宁的手性硫脲,作为硝基甲烷向含吡啶的α,β-不饱和酮的对映选择性迈克尔加成反应中的催化剂。在无溶剂条件下,由3,5-二(三氟甲基)-苯胺制备的双功能催化剂获得了最佳结果。该硫脲对芳基酮具有高的对映选择性和化学收率,促进了反应。通过实验和计算进一步研究了对映选择性的起源。同时,我们反应得到的产物对水稻细菌性叶枯病表现出有效的抗菌活性,其中S-对映体的性能比R更好。-对映体。鉴于此类分子具有广阔的生物活性,我们的工作有望为开发下一代药物设计提供重要的应用。