A straight forward entry to alpha,alpha-dideutero-beta-amino esters starting from the corresponding imines and deuterated acetonitrile has been developed involving a two-step process. (C) 2012 Elsevier Ltd. All rights reserved.
Palladium‐Catalyzed Carbonylative Difunctionalization of C=N Bond of Azaarenes or Imines to Quinazolinones
作者:Xibing Zhou、Yongzheng Ding、Hanmin Huang
DOI:10.1002/asia.202000359
日期:2020.6.2
Supporting information for this article is given via a link at the end of the document. By intercepting the acylpalladium species with C=Nbond of azaarenes or imines other than free amines or alcohols, the difunctionalization of C=Nbond was established via palladium‐catalyzed carbonylation/nucleophilic addition sequence. This method is compatible with a diverse range of azaarenes and imines and allows
Access to Chiral Diamine Derivatives through Stereoselective Cu-Catalyzed Reductive Coupling of Imines and Allenamides
作者:Toolika Agrawal、Robert T. Martin、Stephen Collins、Zachary Wilhelm、Mytia D. Edwards、Osvaldo Gutierrez、Joshua D. Sieber
DOI:10.1021/acs.joc.0c02971
日期:2021.4.2
inducers in stereoselective synthesis that are challenging to prepare in a straightforward and stereoselective manner. Herein, we disclose a cost-effective and readily available Cu-catalyzed system for the reductive coupling of a chiral allenamide with N-alkyl substituted aldimines to access chiral 1,2-diamino synthons as single stereoisomers in high yields. The method shows broad reaction scope and
Asymmetric aza-Diels-Alder reaction: enantio- and diastereoselective reaction of imine mediated by Chiral Lewis acid
作者:Kouji Hattori、Hisashi Yamamoto
DOI:10.1016/s0040-4020(01)80532-9
日期:1993.2
asymmetric aza-Diels-Alder reaction usingchiral boron mediator is developed. The key to its success is the use of the chiral boron complex prepared in situ from (R)- or (S)- binaphthol and B(OPh)3. The enantiomeric reaction of prochiral imine affords products of up to 90% ee. The double asymmetric induction of chiral imine using α-benzylamine as a chiralauxiliary is achieved with almost complete diastereoselectivity
hydroboration of nitriles and imines is attained using pinacolborane with unprecedented catalytic efficiency. Chemoselective hydroboration of nitriles over esters is also demonstrated. A simple [Ru(p-cymene)Cl2]2complex (1) is used as a catalyst precursor, which upon reaction with pinacolborane in situ generates the monohydrido-bridged complex [(η6-p-cymene)RuCl}2(μ-H-μ-Cl)] 2. Further oxidative addition
使用频哪醇硼烷以前所未有的催化效率实现了钌催化的腈和亚胺的硼氢化。还证明了腈对酯的化学选择性氢硼化。一个简单的[Ru(p -cymene)氯2 ] 2配合物(1)被用作催化剂前体,其在与频哪醇反应原位生成monohydrido桥连络合物[(η 6 - p -cymene)的RuCl} 2((μ-H-μ-Cl)] 2。将松果硼烷进一步氧化添加到中间体2中建议导致单核氢化钌物质的形成。反应混合物的质谱分析和与膦连接的钌配合物的独立实验表明,单核钌中间体参与了催化循环。提出从钌中心到配位的腈和硼酸酯亚胺配体的连续分子内1,3-氢化物转移,导致还原并导致形成二硼酸酯,是一种可能的反应机理。
Application of Sequential Cu(I)/Pd(0)-Catalysis to Solution-Phase Parallel Synthesis of Combinatorial Libraries of Dihydroindeno[1,2-<i>c</i>]isoquinolines
作者:Sarvesh Kumar、Thomas O. Painter、Benoy K. Pal、Benjamin Neuenswander、Helena C. Malinakova
DOI:10.1021/co200027c
日期:2011.9.12
methodology is compatible with a wide-range of aliphatic linear, branched, and ester functionalized N-substituents. Unexpectedly, the formation of regioisomers featuring a 1,2,3-contiguous substitution pattern in the aromatic ring of the indene core was observed. Three distinct combinatorial libraries with a total of 111 of members were synthesized, and 80 highly substituted dihydroindenoisoquinolines structurally