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催化学报  2015 

Stereoselectivesynthesisofvic-halohydrinsandanunusualKnoevenagelproductfromanorganocatalyzedaldolreaction:Anon-enaminemode

DOI: 10.1016/S1872-2067(14)60317-X, PP. 1093-1100

Keywords: Aldolreaction,Asymmetricsynthesis,Chloroacetone,Diastereoselectivity,Hydroxypropanoate,Knoevenagelreaction,Pyrrolidinederivative

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Abstract:

?Stereoselectivesynthesisbyanaldolreactionbetweenchloroacetoneandaldehydewasstudiedusingasynthesizedchiralorganocatalystandtriethylamine.Thereactiongaveα-chloro-β-hydroxyketonesinexcellentyieldwithhighantiselectivityandenantioselectivity.ThechiralorganocatalystwasalsousedintheKnoevenagelreaction,whichgaveα-cyano-β-hydroxyketonesatalowtemperatureandtheusualKnoevenagelproductatahightemperature.Bothproductswereobtainedingoodtomoderateyieldwithgoodantiselectivityinthecaseofα-cyano-β-hydroxyketonederivatives.

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