通过C 2对称螺双环二烯与HB(C 6 F 5)2和HB(p C 6 F 4 H)2的硼氢化反应制备了一系列新的螺双环双硼烷催化剂。当用于喹啉加氢时,这些催化剂具有出色的收率和对映体过量,并且显示出高达460的周转率。这些无金属加氢反应的最吸引人的特点是宽泛的官能团耐受性,使该方法可与现有方法互补喹啉加氢的方法。
作者:Rui Liu、Tanyu Cheng、Lingyu Kong、Chen Chen、Guohua Liu、Hexing Li
DOI:10.1016/j.jcat.2013.07.007
日期:2013.11
TsDPEN = 4-methylphenylsulfonyl-1,2-diphenylethylene-diamine) displays enhanced catalytic activity and enantioselectivity in aqueous asymmetric transferhydrogenation with extensive substrates. Furthermore, this heterogeneous catalyst can be conveniently recovered and reused at least 10 times without loss of its catalytic efficiency. These features render this catalyst particularly attractive in practice
Spiro‐Bicyclic Bisborane Catalysts for Metal‐Free Chemoselective and Enantioselective Hydrogenation of Quinolines
作者:Xiang Li、Jun‐Jie Tian、Ning Liu、Xian‐Shuang Tu、Ning‐Ning Zeng、Xiao‐Chen Wang
DOI:10.1002/anie.201900907
日期:2019.3.26
A new series of spiro‐bicyclic bisborane catalysts has been prepared by means of hydroboration reactions of C2‐symmetric spiro‐bicyclic dienes with HB(C6F5)2 and HB(p‐C6F4H)2. When used for hydrogenation of quinolines, these catalysts give excellent yields and enantiomeric excesses, and show turnover numbers of up to 460. The most attractive feature of these metal‐free hydrogenation reactions was the
通过C 2对称螺双环二烯与HB(C 6 F 5)2和HB(p C 6 F 4 H)2的硼氢化反应制备了一系列新的螺双环双硼烷催化剂。当用于喹啉加氢时,这些催化剂具有出色的收率和对映体过量,并且显示出高达460的周转率。这些无金属加氢反应的最吸引人的特点是宽泛的官能团耐受性,使该方法可与现有方法互补喹啉加氢的方法。
Brønsted acid differentiated metal catalysis by kinetic discrimination
作者:Magnus Rueping、René M. Koenigs
DOI:10.1039/c0cc02167a
日期:——
A Brønsted acid differentiated metal catalyzed hydrogenation has been developed. A combinatorial variation of chiral triflylamides with achiral metal complexes results in a highly active catalyst for the asymmetric reduction.
Development of efficient solid chiral catalysts with designable linkage for asymmetric transfer hydrogenation of quinoline derivatives
作者:Yiqi Ren、Lin Tao、Chunzhi Li、Sanjeevi Jayakumar、He Li、Qihua Yang
DOI:10.1016/s1872-2067(20)63764-0
日期:2021.9
structure as a proof of concept, which is constructed by vertically self-pillared nanosheets (VSP-MOF). We further converted VSP-MOF into VSP-cobalt sulfide (VSP-CoS2) through a sulfidation process. Catalysis plays an important role in almost all battery technologies; for metallic batteries, lithium anodes exhibit a high theoretical specific capacity, low density, and low redox potential. However, during
这种垂直自立柱(VSP)结构扩展了传统多孔材料的应用范围,并具有质子/离子迁移简便和增强的反应动力学特性。在这里,我们使用ZIF-67结构作为概念证明,准备了一个单晶金属-有机骨架(MOF),该结构由垂直自堆积纳米片(VSP-MOF)构成。通过硫化过程,我们进一步将VSP-MOF转换为VSP-硫化钴(VSP-CoS 2)。催化在几乎所有电池技术中都起着重要作用。对于金属电池,锂阳极具有较高的理论比容量,低密度和低氧化还原电位。但是,在半电池反应期间(Li ++ e = Li),不受控制的树枝状Li穿透隔膜和固体电解质界面层。当用作锂金属沉积的复合支架时,使用此框架有许多优点:1)VSP-CoS 2基材提供了高的比表面积,以耗散离子通量和传质,并充当了预催化剂, 2)催化Co中心有利于电荷转移过程,并优先将Li +与增强的电场结合,并且3)VSP结构引导金属沿着纳米片2D取向传播而没有突出的
Deracemization of Phenyl-Substituted 2-Methyl-1,2,3,4-Tetrahydroquinolines by a Recombinant Monoamine Oxidase from <i>Pseudomonas monteilii</i>
ZMU-T01
A monoamineoxidase (MAO5) fromPseudomonasmonteilii ZMU‐T01 was first heterologously expressed in Escherichia coli BL21(DE3) and then used as a biocatalyst for the deracemization of racemic 2‐methyl‐1,2,3,4‐tetrahdroquinoline derivatives to yield the unreacted R enantiomer with up to >99 % ee. Sequence alignment revealed that MAO5 shared 14.7 % identity toward the well‐studied monoamineoxidase (MAO‐N)