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H. Junjappa

Applied Materials

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Publication

Featured researches published by H. Junjappa.

Tetrahedron | 2004

Domino carbocationic rearrangements of α-[bis(methylthio)methylene]alkyl-2-(heteroaryl)cyclopropyl ketones

S. Peruncheralathan; V. Sriram; H. Ila; H. Junjappa

Domino carbocationic rearrangements of α-[bis(methylthio)methylene]alkyl-2-(heteroaryl)cyclopropyl ketones (X=O, S, NMe) bearing five-membered heteroaryl group have been investigated. Although the cyclopropyl ketones (R1=H) gave similar products like their aryl counterparts under these conditions, the corresponding α-methylcyclopropyl ketones (R1=Me) yielded a variety of unexpected products depending on the nature of heteroaryl group in the substrate cyclopropyl ketones and the type of acid catalyst used. A probable mechanism for the formation of various products in these transformations has been proposed.

Journal of Organic Chemistry | 2005

Regioselective synthesis of 1-aryl-3,4-substituted/annulated-5-(methylthio)pyrazoles and 1-aryl-3-(methylthio)-4,5-substituted/annulated pyrazoles

S. Peruncheralathan; T. A. Khan; H. Ila; H. Junjappa

Journal of Organic Chemistry | 2007

An efficient highly regioselective synthesis of 2,3,4-trisubstituted pyrroles by cycloaddition of polarized ketene S,S- and N,S-acetals with activated methylene isocyanides.

N. C. Misra; Kausik Panda; Hiriyakkanavar Ila; H. Junjappa

Journal of Organic Chemistry | 2005

Highly Regioselective Synthesis of 1-Aryl-3 (or 5)-alkyl/aryl-5 (or 3)-(N-cycloamino)pyrazoles

S. Peruncheralathan; Yadav Ak; H. Ila; H. Junjappa

Journal of Organic Chemistry | 2006

Palladium-catalyzed intramolecular N-arylation of heteroarenes: a novel and efficient route to benzimidazo[1,2-a]quinolines.

C. Venkatesh; G. S. M. Sundaram; Hiriyakkanavar Ila; H. Junjappa

Journal of Organic Chemistry | 2003

Heteroaromatic annulation of 2-methyl/2-cyanomethylbenzimidazole dianions with α-oxoketene dithioacetals: a highly regioselective synthetic protocol for 1,2- and 2,3-substituted/annulated pyrido[1,2-a]benzimidazoles

Kausik Panda; J. R. Suresh; Hiriyakkanavar Ila; H. Junjappa

Journal of Organic Chemistry | 2007

Domino carbocationic rearrangement of α -[bis (methylthio )methylene ]alkyl -2 -(3 /2 -indolyl) cyclopropyl ketones

Yadav Ak; S. Peruncheralathan; H. Ila; H. Junjappa

Journal of Organic Chemistry | 2007

Dipolar cycloaddition of ethyl isocyanoacetate to 3-chloro-2-(methylthio)/2-(methylsulfonyl)quinoxalines: highly regio- and chemoselective synthesis of substituted imidazo[1,5-a]quinoxaline-3-carboxylates.

G. S. M. Sundaram; B. Singh; C. Venkatesh; Hiriyakkanavar Ila; H. Junjappa

Tetrahedron | 2004

α-Oxoketene dithioacetals mediated heteroaromatic annulation protocol for benzoheterocycles: an efficient regiocontrolled synthesis of highly substituted and annulated indazoles

S Peruncheralathan; Taukeer Ahmad Khan; Hiriyakkanavar Ila; H. Junjappa

European Journal of Organic Chemistry | 2005

Efficient Routes to Acenaphthylene-Fused Polycyclic Arenes/Heteroarenes and Heterocyclic Fluoranthene Analogues

Kausik Panda; Chelvam Venkatesh; Hiriyakkanavar Ila; H. Junjappa

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Collaboration

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Hiriyakkanavar Ila

Jawaharlal Nehru Centre for Advanced Scientific Research

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H. Ila

North Eastern Hill University

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S. Peruncheralathan

National Institute of Science Education and Research

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Chelvam Venkatesh

Indian Institute of Technology Kanpur

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Kausik Panda

Indian Institutes of Technology

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S Peruncheralathan

Indian Institute of Technology Kanpur

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Sukumar Nandi

Indian Institute of Technology Guwahati

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Taukeer Ahmad Khan

Indian Institute of Technology Kanpur

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