(N-Arylaminomethyl)pyridine-N-oxides: Synthesis and characterization of potential ligand systems and the formation of their N,O-chelate aluminum complexes
摘要:
Pyridine-N-oxide-2-carbaldehyde (4a) was converted to the corresponding imine (5a) by treatment with 2,6-diisopropylaniline. Subsequent reduction with a sodium borohydride gave the corresponding ( N-arylaminomethyl) pyridine-N-oxide derivative (6a). A series of analogous compounds was prepared starting from the respective ( aldimino) quinoline-N-oxide ( 4b) or ( ketimino) pyridine-N-oxide ( 10) systems. Deprotonation of the ( aminomethyl) pyridine-N-oxides resulted in a series of unexpected reactions, such as coupling, internal redox reactions or fragmentation. Eventually, the N,O-chelate aluminum complexes ( 22, 23) derived from the ( aminoethyl) pyridine-N-oxide ligand systems could be obtained by treatment of the respective iminopyridine-N-oxides with trimethylaluminum. Many products were characterized by X-ray diffraction. (C) 2008 Elsevier B. V. All rights reserved.
This invention provides novel compounds, methods of using the compounds, and pharmaceutical formulations comprising the compounds.
这项发明提供了新颖的化合物,使用这些化合物的方法,以及包含这些化合物的药物配方。
A Strategy for the Synthesis of Well-Defined Iron Catalysts and Application to Regioselective Diene Hydrosilylation
作者:Jessica Y. Wu、Benjamin N. Stanzl、Tobias Ritter
DOI:10.1021/ja106853y
日期:2010.9.29
the development of a well-defined Fe catalyst and its application to the regio- and stereoselective 1,4-hydrosilylation of 1,3-dienes. To the best of our knowledge, this is the first example of accessing a characterized low-valent Fe catalyst by controlled reductiveelimination from a readily accessible Fe precatalyst.
我们报告了明确定义的 Fe 催化剂的开发及其在 1,3-二烯的区域选择性和立体选择性 1,4-氢化硅烷化中的应用。据我们所知,这是第一个通过从易于获得的 Fe 预催化剂中受控还原消除来获得表征低价 Fe 催化剂的例子。
Metal-organic frameworks containing nitrogen-donor ligands for efficient catalytic organic transformations
申请人:The University of Chicago
公开号:US10647733B2
公开(公告)日:2020-05-12
Metal-organic framework (MOFs) compositions based on nitrogen donor-based organic bridging ligands, including ligands based on 1,3-diketimine (NacNac), bipyridines and salicylaldimine, were synthesized and then post-synthetically metalated with metal precursors, such as complexes of first row transition metals. Metal complexes of the organic bridging ligands could also be directly incorporated into the MOFs. The MOFs provide a versatile family of recyclable and reusable single-site solid catalysts for catalyzing a variety of asymmetric organic transformations. The solid catalysts can also be integrated into a flow reactor or a supercritical fluid reactor.
[EN] METHODS OF PRODUCING ALPHA, BETA-UNSATURATED CARBOXYLIC ACID SALTS FROM ALKANES AND CARBON DIOXIDE<br/>[FR] PROCÉDÉS DE PRODUCTION DE SELS D'ACIDE CARBOXYLIQUE ALPHA, BÊTA-INSATURÉS À PARTIR D'ALCANES ET DE DIOXYDE DE CARBONE
申请人:SABIC GLOBAL TECHNOLOGIES BV
公开号:WO2019053540A1
公开(公告)日:2019-03-21
Methods of producing α,β-unsaturated carboxylic acid salt are described. A method can include reacting an alkene and carbon dioxide with a composition that includes a carboxylation catalyst, an organic base that is solubilized in the composition, and an inorganic base that is not solubilized in the composition, under reaction conditions suitable to produce an inorganic base salt of an α,β-unsaturated carboxylic acid. The organic base can have a first pKa and the inorganic base has a second pKa that is greater than the first pKa.
[EN] PYRIDINE COMPLEX OF ZIRCONIUM, CATALYTIC SYSTEM COMPRISING SAID PYRIDINE COMPLEX OF ZIRCONIUM AND PROCESS OF (CO)POLYMERIZATION OF CONJUGATED DIENES<br/>[FR] COMPLEXE PYRIDINIQUE DE ZIRCONIUM, SYSTÈME CATALYTIQUE COMPRENANT LEDIT COMPLEXE PYRIDINIQUE DE ZIRCONIUM ET PROCÉDÉ DE (CO)POLYMÉRISATION DE DIÈNES CONJUGUÉS
申请人:VERSALIS SPA
公开号:WO2016042014A1
公开(公告)日:2016-03-24
Pyridine complex of zirconium having general formula (I): • Said pyridine complex of zirconium having general formula (I) may advantageously be used in a catalytic system for the (co)polymerization of conjugated dienes.