Finding Furfural Hydrogenation Catalysts via Predictive Modelling
作者:Zea Strassberger、Maurice Mooijman、Eelco Ruijter、Albert H. Alberts、Ana G. Maldonado、Romano V. A. Orru、Gadi Rothenberg
DOI:10.1002/adsc.201000308
日期:2010.9.10
studies showed that this transfer hydrogenation follows the so‐called monohydride pathway. Using these data, we built a predictivemodel for 13 of the catalysts, based on 2D and 3D molecular descriptors. We tested and validated the model using the remaining five catalysts (cross‐validation, R2=0.913). Then, with this model, the conversion and selectivity were predicted for four completely new ruthenium‐carbene
我们结合多组分反应、催化性能研究和预测模型来寻找转移氢化催化剂。最初合成并筛选了 18 种钌卡宾配合物,并在糠醛与异丙醇配合物的转移氢化反应中筛选出不同的产率,从 62% 到 >99.9%,没有明显的结构/活性相关性。对照实验证明,卡宾配体在整个反应过程中始终与钌中心保持配位。氘标记研究显示出次级同位素效应(k H : k D = 1.5)。进一步的机理研究表明,这种转移氢化遵循所谓的一氢化物途径。利用这些数据,我们基于 2D 和 3D 分子描述符建立了 13 种催化剂的预测模型。我们使用其余五种催化剂测试并验证了模型(交叉验证,R 2 =0.913)。然后,利用该模型,预测了四种全新的钌卡宾配合物的转化率和选择性。然后合成并测试这四种催化剂。结果与模型预测的误差在 3% 以内,证明了预测模型在催化剂优化中的有效性和价值。
A facile route to rutheniumâcarbene complexes and their application in furfural hydrogenation
作者:Zea Strassberger、Maurice Mooijman、Eelco Ruijter、Albert H. Alberts、Corien de Graaff、Romano V. A. Orru、Gadi Rothenberg
DOI:10.1002/aoc.1584
日期:——
new N‐heterocyclic carbene (NHC) ligands were synthesized via a multicomponent reaction, wherein an aldehyde or ketone, a primary amine and an α‐acidic isocyanide were reacted, giving the corresponding 2H‐2‐imidazolines. These were easily alkylated with an alkyl halide at position N‐3, yielding the final NHC precursors, that were then complexed with Ru in situ. The resulting complexes are shown to be
Synthesis of Imidazolidine-2-(thi)ones via C2-Selective Oxidation and Thionation of 2-Imidazolinium Halides
作者:Eelco Ruijter、Romano Orru、Maurice Mooijman、Robin Bon、Nanda Sprenkels、Hugo van Oosterhout、Frans de Kanter、Marinus Groen
DOI:10.1055/s-0031-1290087
日期:2012.1
This article describes a scope study for the synthesis of imidazolidine-2-(thi)ones by selective oxidation or thionation of 2-imidazolinium halides, which in turn are synthesized by alkylation of 2-imidazolines obtained from an initial multicomponent reaction.