Ligand dependence of molybdenum-catalyzed alkylations. Molybdenum-isonitrile complexes as a new class of highly reactive alkylation catalysts
作者:Barry M. Trost、Craig A. Merlic
DOI:10.1021/ja00182a018
日期:1990.12
generates the most effective molybdenum catalysts known to date. The reactive catalyst proved to be Mo(RNC) 4 (CO) 2 . With this new catalyst, a much broader range of substrates can be employed including many that failed or reacted very poorly by using molybdenumhexacarbonyl. The regioselectivity also differs from that obtained with molybdenumhexacarbonyl. The stereochemistry of the reaction proceeds with
was a selective metal chelator and could inhibit Cu2+-induced Aβ1-42 aggregation (62.3%). Furthermore, compound 3b presented good neuroprotective effects on H2O2-induced PC12 cell injury. More importantly, compound demonstrated good blood brain barrier permeability and druglike properties. Therefore, compound 3b, a promising multi-targeted active molecule, offers an attractive startingpoint for further
合理设计,合成和评估了一系列席夫氏基础衍生物,将其作为治疗阿尔茨海默氏病(AD)的多功能药物。结果表明,化合物3b是新型多功能剂。它是一种高度选择性的单胺氧化酶-B抑制剂(IC 50 = 8.4 nM),这已在对接研究中得到了解释。化合物3b中也是抗氧化剂(2.3当量)和能抑制显著自诱导甲β 1-42聚集(31.8%)。同时,化合物3B是一个选择性的金属螯合剂和能抑制铜2+诱导的阿β 1-42聚集(62.3%)。此外,化合物3b对H 2 O 2诱导的PC12细胞损伤具有良好的神经保护作用。更重要的是,该化合物具有良好的血脑屏障通透性和类药物特性。因此,化合物3b是一种有前途的多靶点活性分子,为抗AD的药物发现过程中的进一步研究提供了有吸引力的起点。
A Facile Synthesis of Vicinal Diamines Promoted by Low-Valent Niobium: Preparation of Chiral Octahydrobiisoquinolines and Their Application to Catalytic Asymmetric Synthesis
作者:Shigeru Arai、Satoshi Takita、Atsushi Nishida
DOI:10.1002/ejoc.200500301
日期:2005.12
homocoupling of imines to give vicinaldiaminespromoted by low-valentniobium, generated by treatment of NbCl5 with zinc powder, is described. The desired products were obtained in good to excellent yields. Dihydroisoquinoline derivatives also gave the coupling products with good diastereoselectivities (D,L/meso). Optical resolution of the racemic octahydrobiisoquinolines was achieved and their complexes
[EN] RARE EARTH METAL COMPLEX HAVING PHENANTHROLINE COMPOUND AS LIGAND<br/>[FR] COMPLEXE DE MÉTAUX DE TERRE RARE PRÉSENTANT UN COMPOSÉ PHÉNANTHROLINE EN TANT QUE LIGAND
申请人:BRAHMS GMBH
公开号:WO2012124310A1
公开(公告)日:2012-09-20
The present invention provides a rare earth metal complex represented by the following formula (I).
本发明提供了一种由以下式(I)所表示的稀土金属配合物。
New chiral titanium complexes for enantioselective reductive cyclizations of diimines to trans-2,3-diarylpiperazines
作者:Pothiappan Vairaprakash、Mariappan Periasamy
DOI:10.1016/j.tetlet.2007.12.038
日期:2008.2
Enantioselective intramolecular reductive coupling of diimines by chiral titanium complexes, prepared using a titanium(IV) reagent and hemisalen ligands derived from chiral β-amino alcohols, gives trans-2,3-diarylpiperazines in up to 97% ee.