Microwave-Assisted Organocatalytic Quadruple Domino Reactions of Acetaldehyde and Nitroalkenes
作者:Dieter Enders、Ralf Krüll、Wolfgang Bettray
DOI:10.1055/s-0029-1217146
日期:2010.2
A microwave-assisted, organocatalytic domino Michael/Henry condensation/Michael/aldol condensation reaction has been developed. Employing acetaldehyde and nitroalkenes as substrates, this quadruple cascade allows an efficient asymmetric synthesis of trisubstituted cyclohexene carbaldehydes in moderate to good yields (25-45%) and high enantioselectivities (ee = 89 to >99%). ESI-MS measurements were
已经开发了微波辅助的有机催化多米诺迈克尔/亨利缩合/迈克尔/醛醇缩合反应。采用乙醛和硝基烯烃作为底物,这种四级联反应可高效,不对称地合成三取代的环己烯甲醛,产率中等至良好(25-45%)和高对映选择性(ee = 89至> 99%)。进行ESI-MS测量以支持建议的复杂催化循环。 有机催化-级联反应-迈克尔加成-醛醇缩合-环己烯甲醛