Santosh A. Jadhav

ZrO2 nano particle catalyzed multi-component synthesis of 3-benzylidene-1-phenylquinoline-2,4(1H,3H)-diones and its antimicrobial activity

Zirconium nanoparticles (ZrO2 NPs) used for the multi-component synthesis of 3-benzylidene-1-phenylquinoline-2,4(1H,3H)-dione derivatives were synthesized starting from easily available reactant molecule such as aryaldehyde 1, diphenyl amine 2, di-ethyl malonate 3 in water–ethanol as green solvent. The ZrO2 NPs gave better yield for the first four cycles of reactions. The characterizations of the ZrO2 NPs were performed by using X-ray diffraction (XRD), infrared spectroscopy (IR), and ultraviolet–visible (UV–vis) absorption spectroscopy. The morphological property revealed the formation of nanoscale particles. They developed a greener path for the synthesis of quinolinone derivatives using ZrO2 NPs and water–ethanol as catalyst and solvent. The expected results reveal the catalytic activity, reaction time, and the reusability of catalyst. All the prepared compounds 4a–4j (Q1–Q11) were evaluated for their antibacterial and antifungal activity. The compounds Q1, Q2, Q3, Q5 Q6, Q7, and Q10 were more potent for antibacterial strains, and Q2, Q3, Q4, Q5 Q7, Q8, and Q10 were potent for C. Albicans—an antifungal strain—compared to ciprofloxacin and miconazole as a standard drug.Graphical AbstractZrO2 nanoparticle catalyzed multi-component synthesis of 3-benzylidene-1- phenylquinoline-2,4(1H,3H)-diones and their antimicrobial activity

Greener approach: Ionic liquid [Et3NH][HSO4]-catalyzed multicomponent synthesis of 4-arylidene-2-phenyl-5(4H)oxazolones under solvent-free condition

ABSTRACT We have developed simple, greener, safer multicomponent synthesis series of 4-arylidene-2-phenyl-5(4H) oxazolones 4(a-r) catalyzed by Bronsted acid ionic liquid as triethylammonium hydrogen sulfate [Et3NH][HSO4] and catalytic amount of acetic anhydride and sodium acetate with excellent yields (90–99%). The protocol offers economical, environmentally benign, solvent-free conditions, and recycle–reuse of the catalyst and easily available starting as benzoyl chloride 1, amino acid 2 and a variety of aldehydes 3. The cyclization followed by condensation of benzoyl chloride, amino acid, and a variety of aldehydes catalyzed by ILs [Et3NH][HSO4] and catalytic amount of acetic anhydride and sodium acetate. The final products were confirmed by their characterization data such as FTIR, 1H-NMR, 13C-NMR, Mass, high-resolution mass spectra and were compared with its reported method. GRAPHICAL ABSTRACT

Rapid and efficient one-pot microwave-assisted synthesis of 2-phenylimidazo[1,2-a]pyridines and 2-phenylimidazo[1,2-a]quinoline in water–PEG-400

ABSTRACT An effective, expeditious, environmentally benign one-pot synthesis of 2-phenylimidazo[1,2-a]pyridines and 2-phenylimidazo[1,2-a]quinoline from easily available starting materials as aromatic carbonyl compound, 2-amino pyridine, succinamide, and in situ generated α-iodo acetophenone in combination with green solvent PEG-400 and water (2:1) under microwave irradiation. The newly developed protocol with excellent yield of product in very short time of reaction by avoiding the use of lachrymatric α-chloro and α-bromocarbonyl compounds, volatile, toxic organic and hazardous solvents, reagents is the advantage of this research work. The final products were confirmed by their characterization data such as 1H NMR, 13C NMR, high resolution mass spectrometry (HRMS) and were compared with its reported method. GRAPHICAL ABSTRACT

Expeditious one-pot multicomponent microwave-assisted green synthesis of substituted 2-phenyl Quinoxaline and 7-bromo-3-(4-ethylphenyl) pyrido[2,3-b]pyrazine in water–PEG and water–ethanol

ABSTRACT An eco-friendly, expeditious one-pot multicomponent synthesis of substituted 2-phenyl quinoxaline and 7-bromo-3-(4-ethylphenyl) pyrido[2,3-b]pyrazine 4a–k in water–ethanol from easily available starting materials as acetophenone 1, succinamide 2, aromatic amine 3, in situ-generated α-iodo acetophenone from acetophenone, succinamide and catalyzed by silver iodide in combination with green solvent polyethylene glycol-400 and water (2:1) under microwave irradiation. The newly developed protocol with excellent yield of products in very short time of reaction by avoiding the use of lacrimatic α-chloro and α-bromocarbonyl compounds, volatile, toxic organic hazardous solvents, and reagents is the advantage of this research work. The final products were confirmed by their characterization data such as FTIR, 1H NMR, 13C NMR, Mass, HRMS and were compared with its reported method. GRAPHICAL ABSTRACT

ANTIOXIDANT-VITAMIN C: LUNG FUNCTION; LUNG CANCER

ABSTRACT Non-enzymatic vitamin C (ascorbic acid) plays an important role in the medicinal field and acts as antioxidants use in fruits and vegetable such as lemon, orange, grapes, carrots, tomatoes, grapefruit, beans, broccoli, and mangos. It helps to prevent and stop of various diseases such as lung cancer, asthma, and wheezing and finding an antibronchospastic effect. Other factors such as diet have also been implicated in the development of lung cancer. Despite the extensive research conducted in this area, the relationship between diet and lung cancer is still not clear. Diets high in fat and low in vegetables and fruits may increase the risk of lung cancer and other fact eating of tobacco and smoking of cigarette. Lung tissue damage due to high levels of free radicals in cigarette smoke causes direct (tissue oxidation) and indirect (release of oxidizing agents and enzymes). Vitamin C is necessary for phagocytosis. It plays a significant role in daily life, dietary system like eating food, vegetable and smoking of cigarette. It helps to prevent or stop the damage the lung tissue/or cause lung cancer. The present review studied that application of vitamin C act as antioxidant in lung cancer like diseases such as lung-cancer and role in lung function. Keywords: Review, Non-enzymatic antioxidant (vitamin C), Lung function, Lung diseases.