Optical properties and fluorescence quenching of biologically active ethyl 4-(4-N,N-dimethylamino phenyl)-2-methyl-5-oxo-4,5-dihydro-1H-indeno[1,2-b]pyridine-3-carboxylate (DDPC) dye as a probe to determine CMC of surfactants

RSC Advances ◽  
2016 ◽  
Vol 6 (104) ◽  
pp. 102218-102225 ◽  
Author(s):  
Salman A. Khan ◽  
Abdullah M. Asiri ◽  
Saad H. Al-Thaqafy
Keyword(s):  
Optical Properties ◽  
Fluorescence Quenching ◽  
Ethyl Acetoacetate ◽  
Ammonium Acetate ◽  
Biologically Active

4-(4-N,N-Dimethylamino phenyl)-2-methyl-5-oxo-4,5-dihydro-1H-indeno[1,2-b]pyridine-3-carboxylate (DDPC) was prepared via the multi-component reaction of indane-1,3-dione with 4-(dimethylamino)benzaldehyde, ethyl acetoacetate and ammonium acetate.

scholarly journals Mo@GAA-Fe3O4 MNPs: a highly efficient and environmentally friendly heterogeneous magnetic nanocatalyst for the synthesis of polyhydroquinoline derivatives

RSC Advances ◽  
2021 ◽  
Vol 11 (18) ◽  
pp. 10497-10511
Author(s):  
Mehraneh Aghaei-Hashjin ◽  
Asieh Yahyazadeh ◽  
Esmayeel Abbaspour-Gilandeh
Keyword(s):  
Ethyl Acetoacetate ◽  
Ammonium Acetate ◽  
Environmentally Friendly ◽  
Magnetic Nanocatalyst ◽  
Methyl Acetoacetate ◽  
Highly Efficient ◽  
Fe3o4 Mnps

Polyhydroquinolines were obtained from a sequential four-component reaction between dimedone or 1,3-cyclohexandione, ethyl acetoacetate, or methyl acetoacetate as a β-ketoester, aldehydes, and ammonium acetate, with Mo@GAA-Fe3O4 MNPs as a green nanocatalyst.

scholarly journals The Cyclization of Ethyl Acetoacetate and Ketones by Ammonium Acetate

1968 ◽  
Vol 41 (1) ◽  
pp. 165-167 ◽  
Author(s):  
Akio Sakurai ◽  
Hiroshi Midorikawa
Keyword(s):  
Ethyl Acetoacetate ◽  
Ammonium Acetate

Ionic liquid Mediated Synthesis of Schiff bases bearing thiazole and indole moieties

2020 ◽  
Vol 17 ◽  
Author(s):  
Dhanaji Jawale ◽  
Devendra Wagare ◽  
Dinesh Lingampalle ◽  
Prashant Netankar
Keyword(s):  
Ionic Liquid ◽  
Schiff Bases ◽  
Heterocyclic Compounds ◽  
Ammonium Acetate ◽  
Biologically Active ◽  
Environmentally Benign ◽  
Melting Points ◽  
Peg 400 ◽  
Reaction Media ◽  
Layer Chromatography

Aims: Ionic liquid Mediated Synthesis of Schiff bases bearing thiazole and indole moieties. Background: Synthesis of biologically active heterocyclic compounds using environmentally benign method. Materials and Methods: A mixture of amino thiazoles (3a-i) (20 mmol), indole-3-carboxyaldehyde (4) (20 mmol) and ionic liquid (80 mmol) was stirred in ethanol (30 mL) at r.t. The progress of the reaction was monitored by thin layer chromatography. After stirring the reaction mass for 2h the solid mass appeared in the reaction was filtered and crystalized using ethanol. The melting points and the yields of the derivatives are recorded in the Table 2. The filtrate was distilled and residue, ionic liquid was reused for the further reactions of the same batch and noted that it gave moderate to good yields of the products. Results and Discussion: Thus a convenient synthetic protocol for the synthesis of new Schiff bases, N-(4-(3-(4-(4- phenylthiazol-2-ylimino) methyl) phenoxy) propoxy) benzylidene)-4-phenylthiazol-2-amines, (8a-i) and N-((1H-indol-3-yl) methylene)-4-phenylthiazol-2-amines,(5a-i) has been developed by separately allowing the interactions of bis aldehyde (7) and 3-formyl indole (4) with amino thiazoles, (3a-i) in 2-hydroxy ethyl ammonium acetate, an ionic liquid, at r. t. (Scheme 1). Acetophenones, (1a-i) and thiourea were allowed to condense in PEG-400 in the presence of NBS and obtained better yields of aminothiazoles, (3a-i). Amino thiazoles when separately condensed with indole-3-carboxyaldehyde (4) and bis aldehyde (7) in ionic liquid, 2-hydroxy ethyl ammonium acetate (9) gave respective new azomethines, N-((1H-indol-3-yl) methylene)-4-phenylthiazol-2-amines, (5a-i) and N-(4-(3-(4-(4-phenylthiazol-2-ylimino) methyl) phenoxy) propoxy) benzylidene)-4-phenylthiazol-2-amine, (8a-i), respectively. Conclusion: We have synthesized new Schiff bases at r.t. using freshly prepared ionic liquid as medium. This method useful for the preparation of library of Schiff bases. The starting, material required for the synthesis of the Schiff bases, amino thiazoles have been prepared using green reaction media.

Solvent effect on the fluorescence quenching of biologically active carboxamide by aniline and carbon tetrachloride in different solvents using S–V plots

2012 ◽  
Vol 132 (3) ◽  
pp. 558-565 ◽  
Author(s):  
N.R. Patil ◽  
R.M. Melavanki ◽  
S.B. Kapatkar ◽  
K. Chandrasekhar ◽  
N.H. Ayachit ◽  
...  
Keyword(s):  
Carbon Tetrachloride ◽  
Fluorescence Quenching ◽  
Solvent Effect ◽  
Biologically Active

Preparation of Polycrystalline Cds Thin Films by Chemical Bath Deposition

1995 ◽  
Vol 410 ◽  
Author(s):  
Eun A Lee ◽  
Bum-Soo Kim ◽  
Sung Ho Shin ◽  
Jung Il Park ◽  
Kwang Ja Park
Keyword(s):  
Thin Films ◽  
Heat Treatment ◽  
Optical Properties ◽  
Chemical Bath Deposition ◽  
Reaction Temperature ◽  
Ammonium Acetate ◽  
Cadmium Acetate ◽  
Structural And Optical Properties ◽  
Cds Thin Films

ABSTRACTWe prepared CdS thin films from a solution containing cadmium acetate, thiourea, ammonia, and ammonium acetate. We varied fabrication conditions such as the concentrations of reactants, reaction temperature, and heat treatment, to investigate the changes in structural and optical properties of the film. Effects of substrate on the properties were also investigated.

scholarly journals Copper Perchlorate Hexahydrate: An Efficient Catalyst for the Green Synthesis of Polyhydroquinolines under Ultrasonication

2011 ◽  
Vol 2011 ◽  
pp. 1-4 ◽  
Author(s):  
Saurabh Puri ◽  
Balbir Kaur ◽  
Anupama Parmar ◽  
Harish Kumar
Keyword(s):  
Ethyl Acetoacetate ◽  
Room Temperature ◽  
Ammonium Acetate ◽  
Condensation Reaction ◽  
Reaction Times ◽  
Ultrasound Irradiation ◽  
Synthetic Method ◽  
Efficient Catalyst ◽  
High Yields ◽  
Perchlorate Hexahydrate

Copper perchlorate hexahydrate as an efficient catalyst was used for the synthesis of polyhydroquinolines by four-component condensation reaction of aldehyde, ethyl acetoacetate, dimedone, and ammonium acetate in excellent yields and short reaction times at room temperature under ultrasound irradiation. This novel synthetic method is especially favoured because it provides a synergy between copper perchlorate hexahydrate and ultrasound irradiation which offers the advantages of high yields, short reaction times, simplicity, and easy workup compared to the conventional methods reported in the literature.

scholarly journals One-Pot Synthesis of 1,8-Dioxodecahydroacridines and Polyhydroquinoline using 1,3-Di (bromo or chloro)-5,5-Dimethylhydantoin as a Novel and Green Catalyst under Solvent-Free Conditions

2017 ◽  
Vol 57 (4) ◽  
Author(s):  
Behrooz Maleki ◽  
Reza Tayebee ◽  
Mina Kermanian ◽  
Samaneh Sedigh Ashrafi
Keyword(s):  
Ethyl Acetoacetate ◽  
Ammonium Acetate ◽  
Solvent Free ◽  
Environmentally Benign ◽  
One Pot ◽  
Dicarbonyl Compounds ◽  
Green Catalyst ◽  
One Pot Synthesis ◽  
Solvent Free Conditions ◽  
Hantzsch Condensation

Solvent-free, one-pot synthesis of polyhdroquinoline and 1,8-dioxodecahydroacridine derivatives have been described via Hantzsch condensation of various aldehydes, ammonium acetate with (<em>i</em>) cyclic 1,3-dicarbonyl compounds and ethyl acetoacetate and (<em>ii</em>) cyclic 1,3-dicarbonyl compounds (2 mmoles) in a very simple, efficient, and environmentally benign method using 1,3-(dibromo or dichloro)-5,5-dimethylhydantoin as a cheap, non-toxic and neutral catalyst with up to excellent yields.

scholarly journals Solvent Effect on Fluorescence Quenching of 7, 8 Benzo‑4‑azido Methyl Coumarin by Aniline

2013 ◽  
Vol 12 (1) ◽  
pp. 69-85 ◽  
Author(s):  
R M Melavanki ◽  
N R Patil ◽  
D Nagaraja ◽  
H D Patil ◽  
J S Kadadevarmath ◽  
...  
Keyword(s):  
Fluorescence Quenching ◽  
Empirical Relation ◽  
Biologically Active ◽  
Static Quenching ◽  
Einstein Relation ◽  
Positive Deviation ◽  
Quenching Rate ◽  
R And D ◽  
Diffusion Limited ◽  
Static And Dynamic Quenching

Fluorescence quenching of biologically active studies of 7, 8 benzo-4-azidomethyl coumarin (7BAMC) by aniline in four different organic solvents namely benzene, dioxane, tetrahydrofuran and acetonitrile has been carried out at room temperature with a view to understand the quenching mechanisms. The Stern–Volmer (S-V) plot has been found to be non-linear with a positive deviation for all the solvents studied. In order to interpret these results we have invoked the ground state complex formation and sphere of action static quenching models. Using these models various quenching rate parameters have been determined. The magnitudes of these parameters suggest that sphere of action static quenching model agrees well with the experimental results. Hence the positive deviation is attributed to the static and dynamic quenching. Further, with the use of Finite Sink approximation model, it was possible to check these bimolecular reactions as diffusion-limited and to estimate independently distance parameter R’ and mutual diffusion coefficient D. Finally an effort has been made to correlate the values of R’ and D with the values of the encounter distance R and the mutual coefficient D determined using the Edward’s empirical relation and Stokes – Einstein relation.

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