A study of chiral oxazoline ligands with a 1,2,4-triazine and other six-membered aza-heteroaromatic rings and their application in Cu-catalysed asymmetric nitroaldol reactions
作者:Ewa Wolińska
DOI:10.1016/j.tetasy.2014.10.001
日期:2014.11
Enantiomerically pure oxazoline ligands with variously substituted 1,2,4-triazine rings have been synthesized using the Pd-catalysed cross-coupling amination of 3-halo-1,2,4-triazines. The catalytic efficiency of the ligands was studied in the asymmetric Henry reaction of nitromethane with several aldehydes. The appropriate β-nitro alcohols were formed in good yields (up to 93%) and with up to 78%
New Highly Asymmetric Henry Reaction Catalyzed by CuII and aC1-Symmetric Aminopyridine Ligand, and Its Application to the Synthesis of Miconazole
作者:Gonzalo Blay、Luis R. Domingo、Victor Hernández-Olmos、José R. Pedro
DOI:10.1002/chem.200800069
日期:2008.5.19
A new catalytic asymmetricHenryreaction has been developed that uses a C(1)-symmetric chiral aminopyridineligand derived from camphor and picolylamine. A variety of aromatic, heteroaromatic, aliphatic, and unsaturated aldehydes react with nitromethane and other nitroalkanes in the presence of DIPEA (1.0 equiv), Cu(OAc)(2)*H(2)O (5 mol %), and an aminopyridineligand (5 mol %) to give the expected
(2<i>S</i>,5<i>R</i>)-2-Methylaminomethyl-1-methyl-5-phenylpyrrolidine, a chiral diamine ligand for copper(<scp>ii</scp>)-catalysed Henry reactions with superb enantiocontrol
作者:Dagmar Scharnagel、Felix Prause、Johannes Kaldun、Robert G. Haase、Matthias Breuning
DOI:10.1039/c4cc02429j
日期:——
Copper(ii)-complexes of a cis-2-aminomethyl-5-phenylpyrrolidine catalyse enantioselective Henry reactions with extraordinarily high stereocontrol.
铜(II)配合物与顺式-2-氨基甲基-5-苯基吡咯烷催化了具有极高立体控制性的对映选择性亨利反应。
Enantioselective Henry reaction catalyzed by copper(II)—Cinchona alkaloid complexes
作者:Mariola Zielińska-Błajet、Jacek Skarżewski
DOI:10.1016/j.tetasy.2011.02.003
日期:2011.2
An enantioselective Henry reaction was efficiently carried out under mild reaction conditions in the presence of catalytic 9-epi and natural Cinchonaalkaloids and copper (II) acetate. The best catalytic performance was observed for native quinine (12 mol %) and Cu(OAc)2 (10 mol %). Aromatic and aliphatic aldehydes with nitromethane and its α-substituted derivatives provided the corresponding β-nitroalcohols
Application of chiral N,N′-dialkyl-1,2-cyclohexanediamine derivatives in asymmetric copper(II)-catalyzed Henry reactions
作者:Zhao Chunhong、Fei Liu、Shaohua Gou
DOI:10.1016/j.tetasy.2013.12.017
日期:2014.2
A series of chiral N,N′-dialkyl-1,2-cyclohexanediamine derivatives were designed, synthesized, and applied as ligands in asymmetriccopper(II)-catalyzed Henryreactions. The catalysts based on such ligands and copper(II) acetate were found to promote asymmetricHenryreactions between aromatic/aliphatic aldehydes and nitromethane efficiently, and could provide the corresponding β-nitroalcohols in very