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51.
Tankam Rajeswari Tamatam Rekha Guda Dinneswara Reddy Adivireddy Padmaja Venkatapuram Padmavathi 《Journal of heterocyclic chemistry》2019,56(9):2449-2459
A new class of benzazolyl azolyl sulfamoyl acetamides was prepared from azolyl sulfamoyl acetates and benzazolyl amines in the presence of KOtBu in tetrahydrofuran. Compounds with benzothiazole‐thiazole, benzimidazole‐thiazole, benzothiazole‐imidazole, and benzimidazole‐imidazole moieties exhibited excellent antibacterial activity against Bacillus subtilis. 相似文献
52.
Venkatapuram Padmavathi Konda Mahesh Dandu Rangayapalle Chinna Venkata Subbaiah Adivireddy Padmaja 《Heteroatom Chemistry》2008,19(3):261-265
Novel sulfur‐linked bis‐heterocycles, bis‐1,2,3‐selenadiazoles 4 , 1,2,3‐thiadiazoles 5 , and 2H‐diazaphospholes 7 , were synthesized from bis(2‐oxo‐2‐phenylethanone)sulfide 2 by adopting a simple and well‐versed methodology. © 2008 Wiley Periodicals, Inc. Heteroatom Chem 19:261–265, 2008; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/hc.20425 相似文献
53.
54.
S. Palaniswamy U. Goldberg O. Peroomian S. Chakravarthy 《Flow, Turbulence and Combustion》2001,66(4):515-516
Volume Contents
Contents of Volume 66 (2001) 相似文献55.
Venkatapuram Padmavathi Konda Mahesh Pinnu Thriveni Tippireddy Venkata Ramana Reddy 《Journal of heterocyclic chemistry》2007,44(5):1165-1169
A new class of 1,2,3‐selena/thiadiazoles and 2H‐diazaphospholes were synthesized by exploiting α‐ketomethylene group in phenacylsulfonylacetic acid methyl ester. 相似文献
56.
Venkatapuram Padmavathi Dandu Rangayapalle Chinna Venkata Subbaiah Boggu Jagan Mohan Reddy 《Journal of heterocyclic chemistry》2005,42(2):255-258
A new class of bis Michael adducts are prepared from 1,3‐bis‐[2‐(2‐arylethenesulfonyl)‐vinyl]‐benzenes and 1,4‐bis‐[2‐(2‐arylethenesulfonyl)‐vinyl]‐benzenes by double Michael addition reaction with active methylene compounds. 相似文献
57.
Baowei Mao Leong‐Huat Gan Yik‐Yuen Gan Xiaoshi Li Palaniswamy Ravi Kam‐Chiu Tam 《Journal of polymer science. Part A, Polymer chemistry》2004,42(20):5161-5169
Very well‐controlled polymerizations of 2‐(dimethylamino)ethyl methacrylate (DMAEMA) and 2‐(diethylamino)ethyl methacrylate (DEAEMA) in aqueous and methanolic solutions via atom transfer radical polymerization (ATRP) at ambient temperature were demonstrated. Poly(DMAEMA) and poly(DEAEMA) of low polydispersity index (PDI) of ~1.07 were obtained using the p‐toluenesulfonyl chloride/CuCl/1,1,4,7,10,10‐hexamethyl‐triethylenetetramine (p‐TsCl/CuCl/HMTETA) system. Excellent control of polymerization was achieved even in pure methanol. This is in contrast with the very poor control of DMAEMA ATRP in methanol reported previously using a different intiator/catalyst/ligand system. The initiator p‐TsCl underwent hydrolysis reaction in aqueous methanolic solutions with a second‐order rate constant of 6.1 × 10?4 dm3 mol?1 s?1 at 25 °C. Both poly(DMAEMA) and poly(DEAEMA) retained almost full chlorine‐functionization at the chain ends. Well‐defined block copolymers of DEAEMA and DMAEMA were successfully obtained by starting with either macroinitiators of DEAEMA or DMAEMA. Other well‐defined diblock copolymers could be prepared using these macroinitiators. © 2004 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 42: 5161–5169, 2004 相似文献
58.
Cupronickels offer enhanced corrosion protection in marine environments by the formation of passive films on the surface.
Cyclic voltammetric studies were carried on cupronickels in chloride solutions at pH 6.3 to understand the role of chloride
ions in passive film formation. Increase in nickel content of the alloy and of chloride ions in solution decreases film resistance.
Chloride ions take part in reduction of the passive film to copper. A solid-state model for passive film formation involving
chloride ions has been attempted. 相似文献
59.
Venkatapuram Padmavathi Nemallapudi Revathi Chittoor Rajasekhar Chokkappagari Premakumari 《Journal of heterocyclic chemistry》2013,50(3):579-584
A new class of sulfone linked bisheterocycles—pyrrolyl pyrazoles, bispyrazoles, and pyrazolyl isoxazoles—were prepared from 1‐aroyl‐2‐styrylsulfonylethenes, and the products were characterized by spectral parameters and elemental analyses. 相似文献
60.
Synthesis and Antimicrobial Activity of a New Class of Sulfonylmethane Linked Bisheterocycles 下载免费PDF全文
Padmavathi Venkatapuram Seenaiah Dandu Premakumari Chokkappagari Padmaja Adivireddy 《Journal of heterocyclic chemistry》2014,51(6):1757-1763
A new class of sulfonylmethane linked bisheterocycles were prepared and studied their antimicrobial activity. 相似文献