Phosphine-Free Well-Defined Mn(I) Complex-Catalyzed Synthesis of Amine, Imine, and 2,3-Dihydro-1<i>H</i>-perimidine via Hydrogen Autotransfer or Acceptorless Dehydrogenative Coupling of Amine and Alcohol
report the synthesis of amines/imines directly from alcohol and amines via hydrogen autotransfer or acceptorless dehydrogenation catalyzed by well-defined phosphine-free Mn complexes. Both imines and amines can be obtained from the same set of alcohols and amines using the same catalyst, only by tuning the reaction conditions. The amount and nature of the base are found to be a highly important aspect for
Phosphine free Mn-complex catalysed dehydrogenative C–C and C–heteroatom bond formation: a sustainable approach to synthesize quinoxaline, pyrazine, benzothiazole and quinoline derivatives
作者:Kalicharan Das、Avijit Mondal、Dipankar Srimani
DOI:10.1039/c8cc05877f
日期:——
Herein the first sustainable synthesis of quinoxalines, pyrazines and benzothiazoles catalysed by a phosphine free Mn(I) complex via acceptorless dehydrogenative coupling (ADC) is reported. This method is also applied successfully to synthesize quinolines via the dehydrogenation (removal of H2) and condensation (removal of H2O) reaction between 2-aminobenzyl alcohols and secondary alcohols.
[EN] SELECTIVE REDUCTION OF ESTERS TO ALCOHOLS<br/>[FR] RÉDUCTION SÉLECTIVE D'ESTERS EN ALCOOLS
申请人:DSM IP ASSETS BV
公开号:WO2017194663A1
公开(公告)日:2017-11-16
The present invention relates to a selective reduction of esters to their corresponding alcohols.
这项发明涉及酯的选择性还原为它们对应的醇。
[EN] SELECTIVE REDUCTION OF ALDEHYDES AND KETONES<br/>[FR] RÉDUCTION SÉLECTIVE D'ALDÉHYDES ET DE CÉTONES
申请人:DSM IP ASSETS BV
公开号:WO2017194662A1
公开(公告)日:2017-11-16
The present invention relates to a selective reduction of specific aldehydes and ketones to their corresponding alcohols.
本发明涉及选择性将特定醛和酮还原为它们对应的醇。
Phosphine-free cobalt catalyst precursors for the selective hydrogenation of olefins
作者:Pim Puylaert、Andrea Dell'Acqua、Fatima El Ouahabi、Anke Spannenberg、Thierry Roisnel、Laurent Lefort、Sandra Hinze、Sergey Tin、Johannes Gerardus de Vries
DOI:10.1039/c8cy02218f
日期:——
Cobalt(II) complexes bearing phosphine-free tridentate NNS ligands were prepared. Depending on the ligand, dimeric or monomeric complexes were isolated. Monomeric Co(NNMeS)Cl2 selectively catalysed the hydrogenation of olefins in the presence of reducible moieties such as ketones. Further investigation showed that this complex functions as a nanoparticle precursor under the reaction conditions.
制备了带有无膦三齿NNS配体的钴(II)配合物。取决于配体,分离出二聚体或单体复合物。单体Co(NN Me S)Cl 2在可还原部分(例如酮)的存在下选择性催化烯烃的氢化。进一步的研究表明,该络合物在反应条件下起纳米颗粒前体的作用。