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Chaudhary Charan Singh Haryana Agricultural University, Hisar

Chaudhary Charan Singh Haryana Agricultural University popularly known as HAU, is one of Asia's biggest agricultural universities, located at Hisar in the Indian state of Haryana. It is named after India's seventh Prime Minister, Chaudhary Charan Singh. It is a leader in agricultural research in India and contributed significantly to Green Revolution and White Revolution in India in the 1960s and 70s. It has a very large campus and has several research centres throughout the state. It won the Indian Council of Agricultural Research's Award for the Best Institute in 1997. HAU was initially a campus of Punjab Agricultural University, Ludhiana. After the formation of Haryana in 1966, it became an autonomous institution on February 2, 1970 through a Presidential Ordinance, later ratified as Haryana and Punjab Agricultural Universities Act, 1970, passed by the Lok Sabha on March 29, 1970. A. L. Fletcher, the first Vice-Chancellor of the university, was instrumental in its initial growth.

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Subject: Chemistry × Author: Yadav, Lalita × Start date: 1981 × Thesis Type: M.Sc ×
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    ThesisItemOpen Access
    Support catalyst and microwave Irradiation in Eco-friendly organic synthesis
    (CCSHAU, 2005) Yadav, Lalita; Sudhir Kumar
    The present study reports an eco-friendly organic synthesis for the preparation of organic compound using support catalyst and microwave irradiation. This method has been found to be cheaper, cleaner, faster, and gave higher yields of the products. Substituted arylidene benzoyl hydrazine were prepared by using 74 benzaldehyde, 4-hydroxybenzaldehyde, 2-nitrobenzaldehyde, 4-methoxybenzaldehyde, and 4-N,N-dimethoxybenzaldehyde with benzoyl hydrazine and arylidene 4-chlorobenzoyl hydrazines were prepared by using aldehydes with 4-chlorobenzoyl hydrazine by microwave irradiation and adsorbed on alumina. The product obtained have yield 90-95 % which is better than conventional method. Oximes of carbonyl compounds has been prepared by the microwave assisted reaction of ketones and hydroxylamine hydrochloride adsorbed on silica supported Na2Co3 in 4-6 minutes with 91-94 % yield. Alumna supported KMnO4 has been found as a very efficient and clean reagent for the oxidation of primary alcohols to aldehydes. 2,6-diformyl-4-methyl/chlorophenol was prepared by the oxidation of 2,6-dimethylol-4-methyl/chlorophenol using KMnO4 doped alumina. Bridgehead nitrogen heterocycles namely 2 - p h e n yl / ( 4 - c h l o r o p h e n yl ) t h i a z o l o [ 3 , 2 - b ] - s - t r i a z o l - 5 - ( 6 H ) - o n e , 2-phenyl-5,6-dihydrothiazolo[3,2-b]-s-triazole and 2-phenyl-5,6,7-trihydrothiazino[3,2-b]-s-triazole were prepared by the microwave irradiation of 3-phenyl/(4-chlorophenyl)-s-triazolyl-5-thione and chloroacetic acid, 1,2-dichloroethane and 1,3-dibromopropane, respectively. The reactants were adsorbed on acidic alumina/silica. Cyclohexanone has been condensed with various substituent aromatic aldehydes in presence of acidic alumina and microwave irradiation to afford α,α`-diarylidene cyclohexanone in 90-96% yields. The structures of all compounds have been proposed on the basis of their comparison with the known structures.
  • Thumbnail Image
    ThesisItemOpen Access
    Support catalyst and microwave irradiation in eco-friendly organic synthesis
    (CCSHAU, 2005) Yadav, Lalita; Sudhir Kumar
    The present study reports an eco-friendly organic synthesis for the preparation of organic compound using support catalyst and microwave irradiation. This method has been found to be cheaper, cleaner, faster, and gave higher yields of the products. Substituted arylidene benzoyl hydrazine were prepared by using benzaldehyde, 4-hydroxybenzaldehyde, 2-nitrobenzaldehyde, 4- 64 methoxybenzaldehyde, and 4-N,N-dimethoxybenzaldehyde with benzoyl hydrazine and arylidene 4-chlorobenzoyl hydrazines were prepared by using aldehydes with 4-chlorobenzoyl hydrazine by microwave irradiation and adsorbed on alumina. The product obtained have yield 90-95 % which is better than conventional method. Oximes of carbonyl compounds has been prepared by the microwave assisted reaction of ketones and hydroxylamine hydrochloride adsorbed on silica supported Na2Co3 in 4-6 minutes with 91-94 % yield. Alumna supported KMnO4 has been found as a very efficient and clean reagent for the oxidation of primary alcohols to aldehydes. 2,6-diformyl-4- methyl/chlorophenol was prepared by the oxidation of 2,6-dimethylol-4- methyl/chlorophenol using KMnO4 doped alumina. Bridgehead nitrogen heterocycles namely 2-phenyl/(4-chlorophenyl)thiazolo[3,2-b]-s-triazol-5-(6H)- one, 2-phenyl-5,6-dihydrothiazolo[3,2-b]-s-triazole and 2-phenyl-5,6,7- trihydrothiazino[3,2-b]-s-triazole were prepared by the microwave irradiation of 3- phenyl/(4-chlorophenyl)-s-triazolyl-5-thione and chloroacetic acid, 1,2- dichloroethane and 1,3-dibromopropane, respectively. The reactants were adsorbed on acidic alumina/silica. Cyclohexanone has been condensed with various substituent aromatic aldehydes in presence of acidic alumina and microwave irradiation to afford α,α`-diarylidene cyclohexanone in 90-96% yields. The structures of all compounds have been proposed on the basis of their comparison with the known structures.