Base-catalyzed reactions enhanced by solid acids: Amine-catalyzed nitroaldol (Henry) reactions enhanced by silica gel or mesoporous silica SBA-15
作者:Kiyoshi Tanemura、Tsuneo Suzuki
DOI:10.1016/j.tetlet.2017.12.050
日期:2018.1
The reactions of various aldehydes with CH3NO2 catalyzed by Et3N, n-C6H13NH2, and Me2N(CH2)2NH2 were accelerated by the addition of silica gel to give aromatic (aliphatic) β-nitroalcohols, aromatic nitroalkenes, and aromatic 1,3-dinitroalkanes, respectively. Mesoporous silica SBA-15 showed higher activity than silica gel for the synthesis of aromatic nitroalkenes by the reactions of the corresponding
各种醛的用CH反应3 NO 2通过催化的Et 3 N,Ñ -C 6 ħ 13 NH 2,和Me 2 N(CH 2)2 NH 2通过加入加速硅胶,得到芳族(脂族)分别是β-硝基醇,芳族硝基烯烃和芳族1,3-二硝基烷烃。通过相应的醛与n -C 6 H催化的CH 3 NO 2的反应,介孔二氧化硅SBA-15在合成芳族硝基烯烃方面表现出比硅胶更高的活性。13 NH 2。