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Gautham Santhosh Kumar Chavva Kurumurthy Pillalamarri Sambasiva Rao Banda Veeraswamy Pamulaparthi Shanthan Rao Banda Narsaiah 《Helvetica chimica acta》2011,94(9):1692-1696
CuBr/FeCl3 Catalysis as a novel and efficient method has been developed for the preparation of new aryl propargyl imine ether derivatives via C? H activation of aryl propargyl ethers, followed by reaction with imines generated from aldehydes and amines. 相似文献
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Synthesis of Novel Pyrido[3′,2′:4,5]furo[3,2‐d]pyrimidine Derivatives and Their Cytotoxic Activity
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R. Naresh Kumar G. Malla Reddy P. Nagendar C. Kurumurthy P. Shanthan Rao Santosh Karnewar Srigiridhar Kotamraju B. Narsaiah 《Journal of heterocyclic chemistry》2014,51(5):1531-1535
The 3‐amino‐6‐(trifluoromethyl)furo[2,3‐b]pyridine‐2‐carbohydrazide ( 5 ) was prepared from 3‐cyano‐6‐trifluoromethyl‐2(1H)pyridone ( 2 ) in series of steps via selective O‐alkylation, Thorpe–Ziegler cyclization followed by reaction with hydrazine hydrate. The 2‐carbohydrazide ( 5 ) was further reacted with aliphatic acids under different reaction temperatures to form a series of novel N‐acylfuro[2,3‐b]pyridine‐2‐carbohydrazide ( 6 ) and pyrido[3′,2′:4,5]furo[3,2‐d]pyrimidine derivatives ( 7 ). All the compounds 6 and 7 were screened for cytotoxic activity against breast carcinoma MD Anderson‐Metastatic Breast (MDA‐MB) 231 (aggressive) cell lines at 10 µM concentration. Compounds 6a , 6b , and 6c showed promising activity. 相似文献
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G. Kurumurthy 《Optics Communications》2009,282(17):3509-6637
Photoluminescence (PL) properties of Si nanoparticles (Si-np) produced by irradiating the Si wafer with nanosecond laser pulses at 532, 683 and 1064 nm are studied. Si-np are found to be deposited in a doughnut shape around the irradiated spot. The irradiation wavelength is found to be the main cause for the particle size variation. Exposure of the freshly prepared Si-np to air for different periods of time leads to increased PL intensity reaching saturation after few days. The PL spectrum shows two well resolved peaks around 435 nm (2.85 eV) and 441 nm (2.81 eV) within an hour of exposure of the freshly prepared samples to air with broadening of the emission spectrum on further exposure to air. Possible mechanism of particle size variation and PL emission are discussed. 相似文献
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A Facile Approach for the Synthesis of Novel 1,2,4‐Triazolo[4,3‐a]Pyridine Derivatives in Single Step
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G. Santhosh Kumar C. Kurumurthy P. Sambasiva Rao B. Veeraswamy P. Shanthan Rao B. Narsaiah 《Journal of heterocyclic chemistry》2015,52(1):75-79
A series of novel substituted 4‐trifluoromethyl‐pyridin‐2‐yl hydrazide derivatives 5 and 7‐trifluoromethyl‐1,2,4‐triazolo[4,3‐a]pyridine derivatives 6 were synthesized through a facile method in single step from 2‐hydrazino‐pyridine derivatives 4 and their reaction with aliphatic/aromatic acids in the presence of POCl3 and PCl5. In each reaction, an intermediate 5 and product 6 were formed in definite proportion except in 5a , 5d , and 6e and were independent of reaction time and temperature. 相似文献
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Synthesis of Novel 1,2,3‐Triazole/Isoxazole‐Functionalized Imidazo[4,5‐b]pyridin‐2(3H)‐one Derivatives,Their Antimicrobial and Anticancer Activity
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Veeraswamy Banda Santhosh Kumar Gautham Sambasiva Rao Pillalamarri Kurumurthy Chavva Narsaiah Banda 《Journal of heterocyclic chemistry》2016,53(4):1168-1175
A series of novel 1,2,3‐triazole/isoxazole‐functionalized imidazo[4,5‐b]pyridine‐2(3H)‐one derivatives 7 and 8 were prepared starting from pyridin‐2(1H)‐one 1 in a series of steps. Initially, compound 1 was converted into imidazo[4,5‐b]pyridine‐2(3H)‐one 5 via formation of 2‐alkylamino/amino‐6‐phenyl‐4‐(trifluoromethyl)nicotinonitrile 3 followed by hydrolysis 4 and Hoffman type rearrangement 5 . Compound 5 was further reacted with propargyl bromide to form exclusively N‐propargylated derivatives 6 . Compounds 6 were cyclized with arylazides/aryloximes in the presence of CuI and sodium hypochlorite, respectively, and obtained title products 7 and 8 . All the final products 7 and 8 were screened for antimicrobial and anticancer activity. 相似文献
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C. Kurumurthy G. Santhosh Kumar G. Malla Reddy P. Nagender P. Shanthan Rao B. Narsaiah 《Research on Chemical Intermediates》2012,38(2):359-365
A simple and facile strategy for the synthesis of highly substituted imidazoles has been developed by multi-component condensation of 1,2-diketone, aldehyde, amine, and ammonium acetate in presence of tetrabutyl ammonium bromide as catalyst. 相似文献
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An Efficient Protocol for the Synthesis of Novel 1,2,3‐Triazole Substituted 4H‐Chromene Derivatives
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P. Sambasiva Rao G. Malla Reddy C. Kurumurthy B. Veeraswamy G. Santhosh Kumar P. Shanthan Rao B. Narsaiah 《Journal of heterocyclic chemistry》2014,51(Z1):E318-E322
A facile and an efficient protocol has been developed for the synthesis of novel 1,2,3‐triazole substituted 4H‐chromene derivatives 4 in single pot by multicomponent reaction of 1,3‐cyclohexanedione, malononitrile and 1‐substituted 1,2,3‐triazole‐5‐aldehyde using potassium carbonate as catalyst. 相似文献
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Studies on Synthesis of Novel Pyrido[3,2‐e]tetrazolo[1,5‐c]pyrimidine Derivatives and Their Antimicrobial Activity
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B. Veeraswamy G. Santhosh Kumar P. Sambasiva Rao C. Kurumurthy B. Narsaiah 《Journal of heterocyclic chemistry》2014,51(4):1073-1077
A series of novel pyrido[3,2‐e]tetrazolo[1,5‐c]pyrimidine derivative 4 were synthesized starting from 2‐amino‐4‐trifluoromethyl‐6‐phenyl nicotinonitrile 1 via construction of tetrazole followed by fusion of pyrimidine ring. All final products were screened for antibacterial and antifungal activities. 相似文献
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