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Organocatalysed Asymmetric beta-Animation and Multicomponent syn-Selective Diamination of alpha,beta-Unsaturated Aldehydes

机译:有机催化的α-β-不饱和醛类的不对称β-动画和多组分同选择氨基化

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摘要

An easy and affordable route for obtaining chiral beta-aminated-and alpha,beta-diaminated aldehydes,1,3-aminoal-cohols,and related compounds by using organocatalysis is presented.The chiral secondary amine(S)-2-[bis(3,5-bistrifluoromethylphenyl)trimethylsila-nyloxymethyl]pyrrolidine is used as the catalyst to activate alpha,beta-unsaturated aldehydes,which allows succinimide to add in a 1,4-regio-and stereoselective fashion thereby forming N-protected 1,3-aminoaldehydes in good yields and enantioselectivities.This is followed by two easy transformations giving rise to optically active 1,3-aminoalcohols,a common motif in many biologically active compounds,for example,fibrinogen receptor antagonists.Furthermore,optically active alpha,beta-syn-diaminated aldehydes were obtained by the addition of diethyl azodicarboxylate in a one-pot reaction.
机译:提出了一种通过有机催化获得手性β-氨基和α,β-二氨基乙醛,1,3-氨基醇及相关化合物的简便且经济的途径。手性仲胺(S)-2- [bis( 3,5-双三氟甲基苯基)三甲基硅烷基-甲氧基甲基]吡咯烷用作活化α,β-不饱和醛的催化剂,它可使琥珀酰亚胺以1,4-区域和立体选择性方式加入,从而形成受N保护的1,3-氨基醛具有良好的收率和对映选择性。随后进行了两次简单的转化,产生了光学活性的1,3-氨基醇,这是许多生物活性化合物(例如纤维蛋白原受体拮抗剂)中的常见基序。此外,光学活性的α,β-syn通过一锅反应中添加偶氮二羧酸二乙酯获得二价乙醛。

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