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( Amol Jadhav ),김헌 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.1
A ß-cyclodextrin-SO<sub>3</sub>H carbon based solid acid catalyst was prepared in convenient and ecofriendly manner. The synthesized samples were characterized by FTIR, PXRD, EDAX and NH<sub>3</sub>TPD to illustrate that the carbon material has been functionalized with -SO<sub>3</sub>H, -COOH and -OH groups. The catalytic performance of prepared material was studied for synthesis of quinoxaline derivatives from reaction of 1,2-diamines and 1,2-diketones. The results showed excellent yield. The main advantage of this methodology is an easy catalyst preparation and separation, moderate reaction conditions, excellent catalyst recyclability and high product yields.
Organocatalytic Enantioselective Cycloetherifications Using a Cooperative Cation-Binding Catalyst
Jadhav, Amol P.,Oh, Jeong-A,Hwang, In-Soo,Yan, Hailong,Song, Choong Eui American Chemical Society 2018 ORGANIC LETTERS Vol.20 No.17
<P>A highly enantioselective cycloetherification strategy for the straightforward synthesis of enantioenriched tetrahydrofurans, tetrahydropyrans, and oxepanes using Song’s cation-binding oligoEG catalyst and KF as the base is demonstrated. A wide range of <I>ε-</I>, <I>ζ-</I>, and η-hydroxy-α,β-unsaturated ketones were cyclized to the corresponding five-, six-, and seven-membered chiral oxacycles with high enantiopurity. This remarkably successful catalysis can be ascribed to systematic cooperative cation-binding catalysis in a densely confined supramolecular chiral cage generated <I>in situ</I> from the chiral catalyst, substrate, and KF.</P> [FIG OMISSION]</BR>
Jadhav, Amol R.,Bandal, Harshad A.,Kim, Hern Elsevier 2016 Chemical Engineering Journal Vol. No.
<P><B>Abstract</B></P> <P>Zn–Co double metal cyanide (DMC) is found to be an effective heterogeneous catalyst for reductive amination reaction of carbonyl compounds with aromatic amines using inexpensive polymethylhydrosiloxane (PMHS) as a reducing agent. The asprepared catalyst was characterized by scanning electron microscopy (SEM), fourier transform infrared spectroscopy, X-ray diffraction, energy dispersive X-ray spectrometer (EDX), N<SUB>2</SUB> adsorption–desorption, and thermogravimetric analysis. Substituted amines were efficiently synthesized by a convenient, simple and environment friendly procedure in excellent yields. In order to optimize the reaction condition, it was carried out by varying reaction parameter such as temperature and using different solvent. Notably, the highest yield of the desired amine product was achieved in methanol at 60°C. The main advantages of this methodology is easy catalyst preparation and separation, high thermal catalytic stability, mild reaction condition, recyclable catalyst and high yield.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Selective reductive amination of carbonyl compounds using Zn–Co-DMC/PMHS. </LI> <LI> The Zn–Co-DMC catalyst showed higher activity than Zn–Co-PEG-DMC. </LI> <LI> The highest yield of the desired amine product was achieved in methanol at 60°C. </LI> <LI> Stability of the Zn–Co-DMC catalyst system tested by recycling. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Jadhav Amol Maruti,Park Hea Jung,Jang Jae‐Ho,Park Jeong Yong,Kwak Seon Lee,Hwang Do‐Hoon 대한화학회 2022 Bulletin of the Korean Chemical Society Vol.43 No.1
We developed a new green phosphorescent iridium (III) complex, bis[2-(9-ethyl- 9H-carbazol-3-yl)-1-methyl-1H-benzo[d]imidazole]iridium(III) acetylacetonate [(Bic)2 Ir(acac)], which functions as a solution-processable dopant for organic lightemitting diodes (OLEDs). 2-(9-Ethyl-9H-carbazol-3-yl)-1-methyl-1H-benzo[d]imidazole was incorporated as the main ligand, while acetylacetone was introduced as an ancillary ligand in the heteroleptic iridium (III) complex. The molecular structure of the synthesized (Bic)2Ir(acac) was characterized by 1H- and 13C-NMR. In addition, it was well soluble in common organic solvents, suitable for solution processible dopant material. The Ir (III) complex exhibited a green emission in solution state (dichloromethane) with an emission maximum at 503 nm. The solutionprocessed OLED device using (Bic)2Ir(acac) as a green dopant achieved an external quantum efficiency of 6.85%, with a power efficiency of 14.96 lm/W, a maximum luminous efficiency of 23.00 cd/A, and Commission Internationale de Eclairage coordinates of (0.30, 0.61) at 7 wt% doping concentration.
Jadhav, Amol Maruti,Balwe, Sandip Gangadhar,Lim, Kwon Taek,Jeong, Yeon Tae Elsevier 2017 Tetrahedron Vol.73 No.19
<P><B>Abstract</B></P> <P>A green, efficient, and rapid procedure for the synthesis of novel spiro[chromeno[4′,3′:4,5] pyrimido[1,2-<I>b</I>]indazole-7,3′-indoline]-2′,6(9 <I>H</I>)-dione derivatives has been developed by one-pot condensation of 4-hydroxy-2H-chromen-2-one, isatin, and 1H-indazole-3-amine, in the presence of acetic acid in EtOH. This method has the advantages of operational simplicity, and high yield of products via a simple experimental and work-up procedure as compared to the conventional methods. The reaction mechanism and substrate scope of this novel reaction is briefly discussed.</P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Jadhav, Amol R.,Bandal, Harshad A.,Chaugule, Avinash A.,Kim, Hern Elsevier 2017 ELECTROCHIMICA ACTA Vol.240 No.-
<P><B>Abstract</B></P> <P>The electrocatalytic oxidation of small molecules such as methanol and water is the crucial part of energy storage/generation technologies such as fuel cell and metal-air batteries. However, the high overpotential, sluggish reaction dynamics and low stability of electrode materials are the main barriers in developing an excellent catalyst for the anodic electro-oxidation process. To overcome such problems, we developed an easy synthesis root for the preparation of novel mesoporous (MP) Co<SUB>3</SUB>O<SUB>4</SUB> and NiCo<SUB>2</SUB>O<SUB>4</SUB> using a template-free hydrothermal and subsequent annealing method. In which, we used diethylenetriamine as a complexing agent, which was able to control crystal growth of corresponding metal hydroxide, leading to the formation of a mesoporous structure. Results show that the MP-NiCo<SUB>2</SUB>O<SUB>4</SUB> exhibits a current density of 10.0mAcm<SUP>−2</SUP> even at a lower potential (286mV vs. Ag/AgCl) for methanol oxidation reaction compared to that of MP-Co<SUB>3</SUB>O<SUB>4</SUB>. On the other hand, both MP-Co<SUB>3</SUB>O<SUB>4</SUB> and MP-NiCo<SUB>2</SUB>O<SUB>4</SUB> display excellent electrocatalytic activity towards water oxidation with lower onset potential and overpotential (MP-Co<SUB>3</SUB>O<SUB>4</SUB> ɳ<SUB>10</SUB> =302mV and MP-NiCo<SUB>2</SUB>O<SUB>4</SUB> ɳ<SUB>10</SUB> =322mV). The excellent electrochemical performance suggests that this mesoporous MP-NiCo<SUB>2</SUB>O<SUB>4</SUB> and MP-Co<SUB>3</SUB>O<SUB>4</SUB> could be potential candidates for energy and environmentally related applications.</P>
Jadhav, Amol Maruti,Kim, Yeong Il,Lim, Kwon Taek,Jeong, Yeon Tae Elsevier 2018 Tetrahedron letters: the international organ for t Vol.59 No.6
<P><B>Abstract</B></P> <P>A simple, efficient, eco-friendly, and cost-effective method has been developed for the synthesis of <I>N</I>-methyl-3-nitro-aryl-benzo[4,5]imidazo[1,2-<I>a</I>]pyrimidin-2-amine derivatives using 2-aminobenzimidazole, aldehydes and (<I>E</I>)-<I>N</I>-methyl-1-(methylthio)-2-nitroethenamine, in the presence of catalytic amount of <I>p</I>-toluenesulfonic acid (<I>p</I>-TSA) in ethanol at 80 °C conditions. The advantages of this method are the use of an inexpensive and readily available catalyst, shorter reaction times, a wide range of functional group tolerance, and high yield of products via a simple experimental and work-up procedure.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Benzo[4,5]imidazo[1,2-<I>a</I>]pyrimidin-2-amine derivatives. </LI> <LI> The methodology tolerates most of substrates. </LI> <LI> The method no need of extraction and column chromatography. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Hydrogen generation from the hydrolysis of sodium borohydride using Ni-Co-oxide hollow sphere
( Amol Jadhav ),김헌 한국공업화학회 2015 한국공업화학회 연구논문 초록집 Vol.2015 No.0
Ni-Co-oxide hollow sphere were synthesized in a simple one-pot synthesis via a hydrothermal approach, using urea and carbohydrate as precipitating and structure directing agents respectively. Prepared materials were characterized by using various techniques, such as scanning electronic microscopy (SEM), X-ray diffraction spectroscopy (XRD). Mixed metal oxides displayed excellent catalytic activity with hydrogen generation rate of 603 ml g-1 min-1 and low activation energy, further more catalyst could be reused at least four times without any appreciable loss in catalytic activity.