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Your search keyword '"Bhargava, Gaurav"' showing total 3 results
Start Over Author "Bhargava, Gaurav" Topic ring formation (chemistry) Publication Year Range Last 50 years Publisher elsevier b.v.
3 results on '"Bhargava, Gaurav"'

1. A regio and diastereoselective transformation of 3-dienyl-2-azetidinones to novel pyrroloxazine

Author

Anand, Amit, Bhargava, Gaurav, Kumar, Vipan, and Mahajan, Mohinder P.

Subjects
*LACTAMS, *DIELS-Alder reaction, *PHASE transitions, *RING formation (Chemistry), *BENZENE, *HETEROCYCLIC compounds, *SODIUM compounds, *SUBSTITUTION reactions
Abstract

Abstract: The regioselective nitroso Diels–Alder (NDA) cycloadditions of 3-dienyl-2-azetidinones with nitrosobenzene to generate oxazine-substituted β-lactams in excellent yields are reported. The amidiolytic ring opening of the cycloadducts with sodium methoxide followed by iodocyclization using I2/K2CO3 etiquette to capitulate previously unknown, multisubstituted pyrroloxazine in outstanding yields is also accounted. [Copyright &y& Elsevier]

Published
2010
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2. Tandem [2+2] cycloaddition and Cope rearrangement in reactions of cross-conjugated azatrienes with conjugated ketenes: a facile single step synthesis of novel azocinone derivatives

Author

Singh, Parvesh, Bhargava, Gaurav, and Mahajan, Mohinder P.

Subjects
*RING formation (Chemistry), *CHEMICAL reactions, *KETENES, *OXO compounds
Abstract

Abstract: A facile single step synthesis of novel azocinone derivatives involving tandem [2+2] cycloaddition and Cope rearrangement in the reactions of cross-conjugated azatrienes with vinyl/isopropenyl ketenes supported by theoretical calculations is reported. [Copyright &y& Elsevier]

Published
2006
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3. Nickel catalyzed [3+2] cycloaddition reaction of bis(methylenecyclopropane) with cyclic and acyclic dienophiles.

Author

Kuila, Bilash, Mahajan, Dinesh, Singh, Prabhpreet, and Bhargava, Gaurav

Subjects
*NICKEL catalysts, *RING formation (Chemistry), *METHYLENECYCLOPROPANE, *DIENOPHILES, *MICROWAVES
Abstract

Nickel catalyzed [3+2] cycloaddition reactions of bis(methylenecyclopropane) with cyclic and acyclic dienophiles have been explored. The reactions resulted in the formation of functionalized cyclopentanes in good yields. The reactions were also explored under microwave irradiation for the first time to yield [3+2] cycloadducts in short reaction time and high yields. [ABSTRACT FROM AUTHOR]

Published
2015
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