Department of Chemistry, Shibli National P.G. College, Azamgarh, UP (INDIA)

3-Methyl-1-phenylpyrazol-5-one (I) were prepared by mixing ethyl acetoacetate and phenyl hydrazine. These methyl phenyl pyrazolone was treated with bromine in glacial acetic acid to get 4-bromo-3-methyl-1-phenyl pyrazole-5-one (II). These were treated with ammonium N-(phenyldithiocarbamate) and sodium acetate in absolute ethanol to give 3-Methyl-1-phenylpyrazole-5-one-4-yl-N-(phenyl)-dithiocarbamates (IIIa-c). These carbamates when treated with concentrate H2SO4 give 4-methyl-6-phenyl-2-phenylimino-1,3,-dithiolo-[4,5-a]-pyrazole (IVa-c) and on treatment with methyl iodide in methanol gave 4-methyl-6-phenyl- 2-phenylimino-1,3-oxathialo [4,5-d] pyrazole (Va-c). Fungitoxicity of the prepared compounds have been compared with Dithane M-45 a commercial fungicide for their fungitoxic action against Puccinia recondita and Ustilago nuda maydis and the screening results have been correlated with the structural features of the prepared compounds

¹The HNSB Ltd. Science College, Himatnagar, Gujarat, INDIA.
²JJT University, Jhunjhunu, Rajasthan, India

Various oximes, phenylhydrazones and 2, 4 dinitrophenylhydrazones have been synthesized by reaction with different ketonic compounds. The structures of these compounds have been confirmed on the basis of spectral data. The antimicrobial activity of the prepared compounds is discussed and some of them are found to be active.

Department of Chemistry, Shibli National P.G. College, Azamgarh, UP (INDIA)

2-Bromo-6-methyl cyclohexanone on boiling with thiourea gave 2-amino-4-methyl-4,5,6,7-tetrahydrobenzothiazole (I), which inturn were treated with mixture of NH4SCN and aroyl halides in acetone followed by addition of 2-amino-5-phenyl-1,3,4-thiadiazole gives N1-aroyl-N3- (4,5,6,7)-tetrahydrobenzothiazole-2-yl-thioureas (IIa-j) compounds (IIa-j) further reacted with a mixture of POCl3 and PCl5 to yield 5-aryl-4,5,6,7- tetrahydrobenzothiazolo [3,2-a] [1,3,5]-triazine-3-thione (IIIa-j). Antifungal activity of the prepared compounds have been compared with Dithane M-45 against Puccinia recondita and Ustilagonuda var. maydis and the results correlated with their structural features.

Department of Applied Chemistry, J.L. Chaturvedi College of Engineering, Nagpur-09 (INDIA)

Graphene has emerged as 21st century material and is potent enough to serve a future science and technologies. Research published in the journal Nature Communication states that graphene, the world’s thinnest material at one atom thick and 100 times stronger than steel. Due to other similar versatile physico-chemical properties, graphene and its derivatives are being studied in nearly every field of science and engineering. Recent progress has shown that the graphene-based materials can have a profound impact on electronic and optoelectronic devices, chemical sensors, catalysis and nano-composites and energy storage. In the current article we took a brief review of important scientific properties of graphene and its application in various fields, Along with this, synthesis routes for the respective material is discussed in brief.