6343-57-3Relevant academic research and scientific papers
Copper complexes of 1,4-diazabutadiene ligands: Tuning of metal oxidation state and, application in catalytic C-C and C-N bond formation
Mukherjee, Aparajita,Basu, Semanti,Bhattacharya, Samaresh
, (2019/11/11)
Reaction of 1,4-diazabutadiene (p-RC6H4N = C(H)(H)C = NC6H4R-p; R = OCH3, CH3, H and Cl; abbreviated as L-R) with CuCl2·2H2O in methanol at ambient temperature (25 °C) affords a group of doubly chloro-bridged dicopper complexes of type [{CuI(L-R)Cl}2], designated as 1-R. Similar reaction carried out in acetonitrile furnishes a family of doubly chloro-bridged dicopper complexes of type [{CuII(L-R)Cl2}2], designated as 2-R. Molecular structures of 1-OCH3 and 2-OCH3 have been determined by X-ray crystallography. While copper(I) is having a nearly tetrahedral N2Cl2 coordination sphere in 1-OCH3, the N2Cl3 coordination sphere around copper(II) is distorted square pyramidal in nature in 2-OCH3. Isolated 2-R complexes, on dissolution in methanol, are found to undergo facile reduction of the metal center to generate the corresponding 1-R complexes. The 1-R and 2-R complexes show intense absorptions in the visible and ultraviolet regions. Cyclic voltammetry on the 1-R and 2-R complexes shows both metal-centered and ligand centered redox responses. The 1-R complexes are found to efficiently catalyze C-N cross-coupling reactions between arylboronic acids and aryl amines; while the 2-R complexes display notable catalytic efficiency for nitroaldol reactions.
Designing of a magnetically separable Fe3O4@dopa@ML nano-catalyst for multiple organic transformations (epoxidation, reduction, and coupling) in aqueous medium
Dasgupta, Sanchari,Chatterjee, Sourav,Chattopadhyay, Tanmay
, p. 550 - 568 (2019/02/26)
A copper(II) macrocyclic Schiff base complex (ML) was synthesized by condensation between 2,2-dimethylpropane-1,3-diammine and 2,6-diformyl-4-butylphenol with the aim to modify the surface of widely used magnetically separable nanocatalyst Fe3O
Ultrasound-assisted synthesis of two new fluorinated metal-organic frameworks (F-MOFs) with the high surface area to improve the catalytic activity
Joharian, Monika,Morsali, Ali
, p. 135 - 146 (2018/11/24)
Micro- and nano-structures of two zinc(II) based fluorinated metal-organic frameworks (F-MOFs) [Zn2(hfipbb)2(4-bpdh)].(DMF)0.5 (TMU-55) and [Zn2(hfipbb)2(4-bpdb)].(DMF)2 (HTMU-55) with micr
Preparation of diverse BODIPY diesters
Abeywardana, Sewwandi,Cantu, Annabelle L.,Nedic, Teodora,Schramm, Michael P.
, p. 3393 - 3396 (2018/08/17)
The synthesis and properties of a variety of substituted BODIPY diesters is presented. We find that certain substitution patterns afford appreciable yields of the target compounds and that electronic effects result in predicable differential fluorescent behavior. Challenges to further water solubilize these dyes and/or provide new points of attachment for biological tagging remain, these strategies are discussed.
D-Mannitol-derived novel chiral thioureas: Synthesis and application in asymmetric Henry reactions
Liu, Miaoxi,Ji, Nan,Wang, Li,Liu, Peng,He, Wei
, p. 999 - 1004 (2018/02/23)
Five novel thioureas have been obtained through multi-step reactions from D-Mannitol as starting material and applied as catalysts in the asymmetric Henry reaction. Using catalyst 7a, (1S,2R)-2-nitro-1-phenylpropan-1-ol containing two chiral centers was o
A nitroaryloxy aromatic preparation method (by machine translation)
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Paragraph 0109; 0110; 0111; 0112; 0113, (2017/05/23)
The invention discloses a nitroaryloxy aromatic preparation method, comprises the following steps: a, will R1 CHO, R2 CH2 NO2 , Catalyst and a polar organic solvent evenly, 0 °C -40 °C stirring for 6 hours -48 h
A amide preparation method of the compound
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Paragraph 0115; 0116; 0117; 0118, (2017/06/02)
The invention discloses a preparation method for an amide compound. The method comprises the steps of: a. taking R1CHO and R2CH2NO2, adding a catalyst and R3CN, carrying out stirring reaction for 24h-48h at 0DEG C-40DEG C to obtain a reaction liquid; and
Solvent-Free Henry and Michael Reactions with Nitroalkanes Promoted by Potassium Carbonate as a Versatile Heterogeneous Catalyst
Bosica, Giovanna,Polidano, Kurt
, (2017/07/11)
The use of a simple weak inorganic base such as potassium carbonate facilitated the formation of carbon-carbon bonds through both the Henry and the Michael reactions with nitrocompounds. The application of this catalyst under environmentally friendly solventless heterogeneous conditions gave satisfactory to good yields of β-nitroalcohols, involving aliphatic and aromatic starting materials, as well as high to excellent yields in the formation of Michael adducts using several different Michael acceptors and nitroalkanes.
Henry reaction catalyzed by recyclable [C4dabco]OH ionic liquid
Keithellakpam, Sanjoy,Laitonjam, Warjeet S.
, p. 110 - 113 (2016/02/26)
DABCO-based ionic liquid, 1-butyl-4-aza-1-azaniabicyclo[2.2.2]octane hydroxide, has been used as an efficient catalyst for Henry reaction of various carbonyl compounds with nitroalkanes affording very high yields within a short duration. This method is very simple, clean and avoids hazardous organic solvents. The catalyst can be easily recovered and recycled several times.
Henry reaction catalyzed by recyclable [C4dabco]OH ionic liquid
Keithellakpam, Sanjoy,Laitonjam, Warjeet S.
, p. 110 - 113 (2017/01/18)
DABCO-based ionic liquid, 1-butyl-4-aza-1-azaniabicyclo[2.2.2]octane hydroxide, has been used as an efficient catalyst for Henry reaction of various carbonyl compounds with nitroalkanes affording very high yields within a short duration. This method is very simple, clean and avoids hazardous organic solvents. The catalyst can be easily recovered and recycled several times.
