芳氧基和氨基取代的E-和Z-乙基-3-丙烯酸酯的立体定向合成因其在聚合物工业和药物化学中的潜力而受到关注。在铜催化 ( E )- 和 ( Z )-3-碘代丙烯酸乙酯与苯酚和N-杂环的交叉偶联反应过程中,我们发现了一种非常简单的(非金属)方法用于芳氧基和氨基取代的立体定向合成丙烯酸酯。为了研究芳氧基和氨基取代的丙烯酸酯的立体选择性这个长期存在的问题,一系列O-和N-取代的亲核试剂被允许与( E )-和( Z )-3-碘代丙烯酸乙酯反应。不同碱的筛选表明,DABCO(1,4-二氮杂双环[2.2.2]辛烷)以立体有择方式成功地将( E )-和( Z )-3-碘代丙烯酸乙酯转化为芳氧基和氨基取代的丙烯酸乙酯。本文详细介绍了这种 DABCO 介导的芳氧基和氨基取代的E-或Z-丙烯酸酯的立体定向合成。
First Application of an Efficient and Versatile Ligand for Copper-Catalyzed Cross-Coupling Reactions of Vinyl Halides with <i>N</i>-Heterocycles and Phenols
作者:M. Shahjahan Kabir、Michael Lorenz、Ojas A. Namjoshi、James M. Cook
DOI:10.1021/ol9026446
日期:2010.2.5
2-Pyridin-2-yl-1H-benzoimidazole L3 is presented as a new, efficient, and versatile bidentate N-donor ligand suitable for the copper-catalyzed formation of vinyl C−N and C−O bonds. This inexpensive and easily prepared ligand facilitates copper-catalyzedcross-couplingreactions of alkenyl bromides and iodides with N-heterocycles and phenols to afford the desired cross-coupled products in good to excellent
2-Pyridin-2-yl-1H-benzoimidazole L3 是一种新型、高效、多功能的双齿 N 供体配体,适用于铜催化形成乙烯基 CN 和 CO 键。这种廉价且易于制备的配体促进了铜催化的烯基溴化物和碘化物与N-杂环和酚的交叉偶联反应,以良好至极好的收率提供所需的交叉偶联产物,并完全保留立体化学。这种方法特别值得注意,因为它的效率,即温和的反应条件、低催化剂负载、简单、多功能和优异的官能团耐受性。
A new class of potential anti-tuberculosis agents: Synthesis and preliminary evaluation of novel acrylic acid ethyl ester derivatives
作者:M. Shahjahan Kabir、Ojas A. Namjoshi、Ranjit Verma、Rebecca Polanowski、Sarah M. Krueger、David Sherman、Marc A. Rott、William R. Schwan、Aaron Monte、James M. Cook
DOI:10.1016/j.bmc.2010.05.016
日期:2010.6.15
Novel acrylic acid ethyl ester derivatives were synthesized and evaluated as potentialagents against Mycobacterium species. A versatile and efficient copper-catalyzed coupling process was developed and used to prepare a library of substituted acrylic acid ethyl ester analogs. Minimum inhibitory concentration assays indicated that two of these compounds 3 and 4 have greater in vitro activity against
Base-Mediated Stereospecific Synthesis of Aryloxy and Amino Substituted Ethyl Acrylates
作者:M. Shahjahan Kabir、Ojas A. Namjoshi、Ranjit Verma、Michael Lorenz、V. V. N. Phani Babu Tiruveedhula、Aaron Monte、Steven H. Bertz、Alan W. Schwabacher、James M. Cook
DOI:10.1021/jo201948e
日期:2012.1.6
nucleophiles was allowed to react with ethyl (E)- and (Z)-3-iodoacrylates. Screening of different bases indicated that DABCO (1,4-diazabicyclo[2.2.2]octane) afforded successful conversion of ethyl (E)- and (Z)-3-iodoacrylates into aryloxy and amino substituted ethyl acrylates in a stereospecific manner. Herein are the details of this DABCO-mediated stereospecificsynthesis of aryloxy and amino substituted
芳氧基和氨基取代的E-和Z-乙基-3-丙烯酸酯的立体定向合成因其在聚合物工业和药物化学中的潜力而受到关注。在铜催化 ( E )- 和 ( Z )-3-碘代丙烯酸乙酯与苯酚和N-杂环的交叉偶联反应过程中,我们发现了一种非常简单的(非金属)方法用于芳氧基和氨基取代的立体定向合成丙烯酸酯。为了研究芳氧基和氨基取代的丙烯酸酯的立体选择性这个长期存在的问题,一系列O-和N-取代的亲核试剂被允许与( E )-和( Z )-3-碘代丙烯酸乙酯反应。不同碱的筛选表明,DABCO(1,4-二氮杂双环[2.2.2]辛烷)以立体有择方式成功地将( E )-和( Z )-3-碘代丙烯酸乙酯转化为芳氧基和氨基取代的丙烯酸乙酯。本文详细介绍了这种 DABCO 介导的芳氧基和氨基取代的E-或Z-丙烯酸酯的立体定向合成。