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A. Advances in Copper Hydride-Catalyzed Reactions B. Bimetallic Heterogeneous Catalysis C. Tandem Olefin Metathesis/Elimination.

机译:A.氢化铜催化反应的进展B.双金属多相催化C.串联烯烃的复分解/消除。

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摘要

Catalytic amounts of copper hydride ligated with a variety of ligands have been shown to effectively enable numerous reactions, most famously conjugate reductions of alpha,beta-unsaturated carbonyl compounds. This dissertation describes furthering the application of ligated CuH. Specifically: I) a bis-phosphine analogue of Stryker's reagent has been shown to be a more active reagent for Michael type hydrosilylations; II) hydroboration of ynoates has been achieved using catalytic amounts of phosphine ligated CuH using pinacolborane. Reactivity of these novel alpha-boryl enoates has been assessed; III) approaches to enantioselective reductive Ireland-Claisen rearrangement of allylic enoates are described; IV) substrate controlled shift in regioselectivity of CuH-catalyzed hydrosilylations of alpha,beta-unsaturated ketones from 1,4- to 1,2-mode has been discovered. This reactivity allowed for valuable nonracemic allylic alcohols to be synthesized in high yields and with enantioselectivities up to 96%.;Solid-supported catalysts are highly desirable in pharmaceutical industry as they allow for easy separation of catalyst from the reaction mixture. Although most commonly limited to one active metal species impregnated on a solid support, multiple metals offer some inherent advantages to the catalysis. Copper-and-nickel on charcoal is described herein as such a bimetallic catalyst, capable of effecting transformations characteristic of each separate metal (etherifications and conjugate reductions presented in detail) as well as consecutive reactions for which both metals are necessary.;Development of tandem processes in organic synthesis is a highly desirable goal. Ruthenium catalyzed olefin metathesis coupled with E2 elimination is described herein as a method for obtaining alpha,beta,gamma,delta-dienyl carbonyl compounds.
机译:已经显示出催化量的与各种配体连接的氢化铜可有效地进行许多反应,最著名的是α,β-不饱和羰基化合物的共轭还原。本文进一步介绍了连接CuH的应用。具体而言:I)Stryker试剂的双膦类似物已被证明是对Michael型氢化硅烷化反应更具活性的试剂; II)使用频哪醇硼烷使用催化量的膦连接的CuH已经实现了对硼酸盐的硼氢化。这些新型的α-硼烯烯酸酯的反应性已得到评估。 III)描述了烯丙基烯酸酯的对映选择性还原爱尔兰-克莱森重排的方法; IV)已经发现了由底物控制的CuH催化的α,β-不饱和酮的氢甲硅烷基化的区域选择性从1,4-模式转变为1,2-模式。这种反应性使得可以高收率和高达96%的对映选择性合成有价值的非外消旋烯丙基醇。固体负载的催化剂在制药工业中是非常需要的,因为它们使催化剂易于从反应混合物中分离出来。尽管最普遍地限于浸渍在固体载体上的一种活性金属,但是多种金属为催化提供了一些固有的优点。木炭上的铜和镍在本文中被描述为这种双金属催化剂,能够实现每种单独金属的特征转化(详细介绍了醚化和共轭还原),以及需要两种金属进行的连续反应。有机合成中的化学方法是一个非常理想的目标。本文将钌催化的烯烃复分解与E 2消除相结合描述为获得α,β,γ,δ-二烯基羰基化合物的方法。

著录项

  • 作者

    Boskovic, Zarko V.;

  • 作者单位

    University of California, Santa Barbara.;

  • 授予单位 University of California, Santa Barbara.;
  • 学科 Chemistry Inorganic.;Chemistry Organic.
  • 学位 Ph.D.
  • 年度 2011
  • 页码 265 p.
  • 总页数 265
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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