alcohol–CuII catalyst: Highlyenantioselective Henry reactions between aromatic aldehydes and nitromethane have been developed. The reactions were catalyzed by an easily available and operationally simple amino alcohol–copper(II) catalyst (see scheme). In total, 38 substrates were tested and the R‐configured products were obtained in good yields with excellent enantioselectivities.
氨基醇-Cu II 催化剂:已开发出芳香醛与硝基甲烷之间的高度对映选择性的亨利反应。反应是由易于获得且操作简单的氨基醇-铜(II)催化剂催化的(请参见方案)。总共测试了38种底物,并以高收率和出色的对映选择性获得了R构型的产品。
Enantioselective Henry Reaction Catalyzed by Optically Active Ketoiminatocobalt Complexes
In the presence of a catalytic amount of opticallyactive ketoiminatocobalt complexes, the enantioselective Henry reaction proceeded to afford β-nitro alcohols in good-to-high yields with high enan...
as a potential new class of chiral ligands for copper-catalyzed nitro-aldol reactions. The model nitro-aldol reaction took place smoothly at ambient temperature in the presence of catalytic amounts (5–15 mol %) of the ligands and copper(II) acetate to afford the nitro-aldol product in good to excellent yield without accompanying dehydration. Amino-alcohol ligands bearing N-(2-alkylthio)benzyl substituents
The enantioselective Henry reaction catalyzed by the optically active salen-cobalt complexes, proceeded to afford β-hydroxynitroalkanes in good-to-high yields with high enantioselectivity.
Highly asymmetric Henry reaction catalyzed by chiral copper(II) complexes
作者:Bukuo Ni、Junpeng He
DOI:10.1016/j.tetlet.2012.11.053
日期:2013.2
Two chiral pyridinylmethyl diphenylprolinolsilyl ether derivatives have been synthesized from N-alkylation of (S)-diphenylprolinolsilyl ether in a single step. They were successfully applied as ligands in the Cu(II)-catalyzed enantioselective Henryreaction between aldehydes and nitromethane in ethanol at room temperature. A variety of chiralHenry products β-nitroalcohols were obtained in good to