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Browsing by Subject "Facile synthesis"

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[6+3] cycloaddition of pentafulvenes with 3-oxidopyrylium betaine: a novel methodology toward the synthesis of 5-8 fused oxabridged cyclooctanoids

Syam Krishnan, K; Sajisha, V S; Anas, S; Suresh, C H; Bhadbhade, M M; Bhosekar, G V; Radhakrishnan, K V (Elsevier, 2006)

Pentafulvenes undergo a facile [6+3] cycloaddition with 3-oxidopyrylium betaine, generated from the corresponding pyranulose acetate, leading to the formation of 5-8 fused oxabridged cyclooctanoids. The product is formed ...
Construction of heterocycles via 1,4-dipolar cycloaddition of quinoline-DMAD zwitterion with various dipolarophiles

Vijay Nair, G; Devipriya, S; Suresh, E (Elsevier, 2008)

Quinoline forms 1,4-zwitterion with dimethyl acetylenedicarboxylate, which is trapped by various dipolarophiles to yield a variety of pyridoquinoline and oxazinoquinoline derivatives.
Engaging zwitterions in carbon-carbon and carbon-nitrogen bond-forming reactions: A promising synthetic strategy

Vijay Nair, G; Rajeev S Menon; Sreekanth, A R; Abhilash, N; Biju, A T (American Chemical Society, 2006)

An Account of carbon-carbon and carbon-nitrogen bond-forming reactions mediated by zwitterions generated by the addition of organic nucleophiles to activated unsaturated systems highlighting their synthetic potential is presented.
An exclusive approach to 3,4-disubstituted cyclopentenes and alkylidene cyclopentenes via the palladium catalyzed ring opening of azabicyclic olefins with aryl halides

Nayana Joseph; Rani Rajan; Jubi John; Devika, N V; Sarath Chand, S; Suresh, E; Pihko, P M; Radhakrishnan, K V (Royal Society of Chemistry, 2013)

A simple and efficient method for the stereoselective ring opening of bicyclic hydrazines with various aryl halides under palladium catalysis has been elaborated. The reactions afforded trans-3,4-disubstituted cyclopentenes ...
Interplay of dual reactivity in the reaction of pentafulvenes with 1,2,4-triazoline-3,5-diones: Experimental and theoretical investigations

Anas, S; Syam Krishnan, K; Sajisha, V S; Anju, K S; Radhakrishnan, K V; Suresh, E; Suresh, C H (Royal Society of Chemistry, 2007)

A detailed investigation on the reaction of pentafulvenes with N-substituted-1,2,4-triazoline-3,5-diones leading to the formation of five- and seven-membered azapolycycles is described. The observed reactivity is explained ...
Molecular template approach for evolution of conducting polymer nanostructures: Tracing the role of morphology on conductivity and solid state ordering

Jinish Antony, M; Jayakannan, M (American Chemical Society, 2011)

Here, we report a unique molecular template approach, for the first time, to Study the evolution of the different types of nanomaterial morphologies Such as nanofiber, nanorod, nanosphere, and nanotube in a single system ...
Palladium/Lewis acid mediated domino reaction of pentafulvene derived diazabicyclic olefins: efficient access to spiropentacyclic motif with an indoline and pyrazolidine fused to cyclopentene

Sarath Chand, S; Jijy, E; Praveen, P; Szymoniak, J; Preethanuj, P; Dhanya, B P; Radhakrishnan, K V (American Chemical Society, 2013)

A palladium/Lewis acid mediated stepwise and one-pot transformation of pentafulvene derived diazabicyclic olefins is described. The reaction offers a facile strategy for the synthesis of novel spiropentacyclic motifs with ...
Phosphine-mediated reaction of 3-alkyl allenoates and diaryl 1,2-diones: efficient diastereoselective synthesis of fully substituted cyclopentenones

Anu Jose; Seetha Lakshmi, K C; Suresh, E; Vijay Nair, G (American Chemical Society, 2013)

An efficient phosphine-mediated diastereoselective synthesis of substituted cyclopentenones from 3-alkyl allenoates and diaryl 1,2-diones is described.
Reaction of dimethoxycarbene-DMAD zwitterion with 1,2-diones and anhydrides: A novel synthesis of highly substituted dihydrofurans and spirodihydrofurans

Vijay Nair, G; Ani Deepthi; Manojkumar, P; Bindu, S; Sreekumar, V; Beneesh, P B; Resmi Mohan; Suresh, E (American Chemical Society, 2006)

The zwitterion formed by the reaction of dimethoxycarbene and DMAD adds efficiently to one of the carbonyl groups of 1,2-dicarbonyl compounds and anhydrides to generate dihydrofurans and spirodihydrofurans in good yields. ...

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