significantly facilitate mass transfer and catalyst utilization, improving the synergistic catalytic abilities in cascadereactions. The obtained bifunctional nanocatalysts enabled efficient two-stepone-potcascadereactions of different types: dynamic kinetic resolution of primaryamines in organic solvent with high yield and enantioselectivity (up to 99% yield and 98% ee) and degradation of organophosphate
设计了具有PdPt双金属核和固定有酶的聚多巴胺(PDA)壳的介孔核-壳结构纳米催化剂,其中PDA壳用作将双金属核和酶置于分离位置的屏障。核和壳的可及的介孔结构显着促进了传质和催化剂的利用,提高了级联反应中的协同催化能力。所获得的双功能纳米催化剂实现了不同类型的有效的两步式一锅级联反应:伯胺在有机溶剂中的动态动力学拆分,具有高收率和对映选择性(高达99%的收率和98%ee),以及降解有机磷神经毒剂。高速率常数和周转频率数值(0.8分钟–1和20 min –1分别)。
Dynamic Kinetic Resolution of Primary Amines with a Recyclable Pd Nanocatalyst for Racemization
作者:Mahn-Joo Kim、Won-Hee Kim、Kiwon Han、Yoon Kyung Choi、Jaiwook Park
DOI:10.1021/ol070130d
日期:2007.3.1
A practical procedure for the dynamic kinetic resolution (DKR) of primary amines has been developed. This procedure employs a palladium nanocatalyst as the racemization catalyst, a commercial lipase (Novozym-435) as the resolution catalyst, and ethyl acetate or ethyl methoxyacetate as the acyldonor. Eleven primary amines and one amino acid amide have been efficiently resolved with good yields (85-99%)
Chemoenzymatic Dynamic Kinetic Resolution of Primary Amines Using a Recyclable Palladium Nanoparticle Catalyst Together with Lipases
作者:Karl P. J. Gustafson、Richard Lihammar、Oscar Verho、Karin Engström、Jan-E. Bäckvall
DOI:10.1021/jo500508p
日期:2014.5.2
amines to DKR reactions using two commercially available lipases, Novozyme-435 (Candida antartica Lipase B) and Amano Lipase PS-C1 (lipase from Burkholderia cepacia) as biocatalysts. The latter enzyme has not previously been used in the DKR of amines because of its low stability at temperatures over 60 °C. The viability of the heterogeneous Pd-AmP-MCF was further demonstrated in a recycling study,
Chemoenzymatic Dynamic Kinetic Resolution of Primary Benzylic Amines using Pd
<sup>0</sup>
‐CalB CLEA as a Biohybrid Catalyst
作者:Karl P. J. Gustafson、Tamás Görbe、Gonzalo de Gonzalo‐Calvo、Ning Yuan、Cynthia L. Schreiber、Andrey Shchukarev、Cheuk‐Wai Tai、Ingmar Persson、Xiaodong Zou、Jan‐E. Bäckvall
DOI:10.1002/chem.201901418
日期:2019.7.11
Herein, we report on the use a biohybrid catalyst consisting of palladium nanoparticles immobilized on cross‐linked enzyme aggregates of lipase B of Candidaantarctica (CalB CLEA) for the dynamickineticresolution (DKR) of benzylic amines. A set of amines were demonstrated to undergo an efficient DKR and the recyclability of the catalysts was studied. Extensive efforts to further elucidate the structure
Artificial plant cell walls as multi-catalyst systems for enzymatic cooperative asymmetric catalysis in non-aqueous media
作者:Luca Deiana、Abdolrahim A. Rafi、Veluru Ramesh Naidu、Cheuk-Wai Tai、Jan-E. Bäckvall、Armando Córdova
DOI:10.1039/d1cc02878b
日期:——
cellulose-based artificial plant cell wall (APCW) structures that contain different types of catalysts is a powerful strategy for the development of cascade reactions. Here we disclose an APCW catalytic system containing a lipase enzyme and nanopalladium particles that transform a racemic amine into the corresponding enantiomerically pure amide in high yield via a dynamic kinetic resolution.