Asymmetric Hydrogenation Using Rhodium Complexes Generated from Mixtures of Monodentate Neutral and Anionic Phosphorus Ligands
作者:Dominik J. Frank、Axel Franzke、Andreas Pfaltz
DOI:10.1002/chem.201202408
日期:2013.2.11
anionic phosphorus ligands was synthesized and evaluated in the asymmetric rhodium‐catalyzedhydrogenation of functionalizedolefins by using either catalysts containing identical ligands or catalysts generated from mixtures of two different ligands. We expected that the combination of an anionic ligand with a neutral ligand would favor the formation of hetero over homo bis‐ligand complexes due to charge
We present a simple method to prepare diverse benzimidazolium and imidazoliumionicliquids (ILs) from common starting materials imidazole and benzimidazole. These green ILs promote the synthesis of N-substituted piperazinyl propargylamines via a versatile CuI-catalyzed coupling of aldehydes, secondary amines, and alkynes under ultrasound. Remarkably, the method works across a broad range of substrates
我们提出了一种简单的方法,从常见的起始材料咪唑和苯并咪唑制备各种苯并咪唑鎓和咪唑鎓离子液体(IL)。这些绿色离子液体通过超声下通用的 CuI 催化的醛、仲胺和炔烃的偶联,促进 N-取代的哌嗪基炔丙胺的合成。值得注意的是,该方法适用于多种底物,包括多种取代的醛、杂环、环胺和苯乙炔。为了了解这种多功能性,我们研究了 IL 结构(N-取代、阴离子)对反应性的影响。苯并咪唑鎓阳离子和溴化物 (Br − ) 阴离子上的对称长链取代基导致最有效的炔丙胺形成。这种方法提供了一种可持续、高效的炔丙胺生产途径,在五个循环中,废物最少,催化剂/离子液体可循环利用。
Synthesis and Preliminary Pharmacological Evaluation of 4´-Arylmethyl Analogues of Clozapine. I. The Effect of Aromatic Substituents
作者:B. Capuano、I. T. Crosby、E. J. Lloyd、D. A. Taylor
DOI:10.1071/ch02093
日期:——
dopamine D4 and serotonin 5-HT2A antagonist activity with potential for the treatment of schizophrenia, we report a family of compounds based on structural modification of the atypical antipsychotic, clozapine (2). The chemical synthesis, structural characterization and pharmacological evaluation of a series 4�-arylmethyl analogues of clozapine are described. Preliminary receptor binding data are presented