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Browsing by Author "Baby Viswambharan"

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Activation of the NC-H bond of Baylis-Hillman adducts of N-methylisatin with CAN/ROH

Shanmugam, P; Vaithyanathan, V; Baby Viswambharan (Elsevier, 2006)

A facile method for activation of the NC-H bond of N-methylisatin and Baylis-Hillman adducts of N-methylisatin with cerium ammonium nitrate (CAN) and saturated and unsaturated alcohols is reported. Adducts bearing an ester ...
A facile and efficient synthesis of highly functionalised 3,3 '-dispiropyrrolidine- and 3,3 '-dispiropyrrolizidine bisoxindoles via [3+2] cycloaddition

Shanmugam, P; Baby Viswambharan; Selvakumar, K; Suchithra, M (Elsevier, 2008)

The [3+2] cycloaddition reaction of azomethine ylides with isomerised Morita-Baylis-Hillman adducts, both dipoles and dipolarophiles are derived from isatin, afforded highly functionalised 3,3'-dispiro pyrrolidine- and ...
A first one-pot synthesis, isomerization and synthetic utility of mono- and bis Morita-Baylis-Hillman adducts of 1,1 '-ferrocenedialdehyde

Shanmugam, P; Suchithra, M; Selvakumar, K; Vaithiyanathan, V; Baby Viswambharan (Elsevier, 2009)

A one-pot synthesis of mono- and bis-Morita-Baylis-Hillman adducts of 1,1'-ferrocenedialdeliyde has been achieved. These adducts undergo a facile and efficient stereoselective isomerization with a number of saturated, ...
Pyridine core activation via 1,5-electrocyclization of vinyl pyridinium ylides generated from bromo isomerized Morita-Baylis-Hillman adduct of isatin and pyridine: Synthesis of 3-spirodihydroindolizine oxindoles

Baby Viswambharan; Selvakumar, K; Suchithra, M; Shanmugam, P (American Chemical Society, 2010)

An activation of the pyridine nucleus has been achieved via 1,5-electrocyclization of vinyl pyridinium ylides generated from bromo isomerized Morita-Baylis-Hillman adducts of isatin and pyridine under basic conditions. The ...
Synthesis of 3-heteroaryl-substituted tetrahydrofurans from the Baylis-Hillman adducts of heteroarylaldehydes by n-Bu3SnH-mediated 5-exo-trig vinyl radical cyclization

Shanmugam, P; Rajasingh, P; Baby Viswambharan; Vaithiyanathan, V (Taylor & Francis, 2007)

The synthesis of 3-heteroaryl-substituted tetrahydrofurans from the propargyl derivative of Baylis-Hillman adducts of heteroaryl aldehydes by n-Bu3SnH- mediated 5-exo-trig vinyl radical cyclization in high yield is reported.
Synthesis of highly functionalised linear pentacyclic compounds from Baylis-Hillman adduct of heteroaldehydes with azomethine ylides via [3+2] cycloaddition

Shanmugam, P; Suchithra, M; Baby Viswambharan; Vaithiyanathan, V (CSIR, 2008)

Montmorillonite K10 clay promoted one-pot synthesis of penta- and tetracyclic systems from Baylis-Hillman adduct of heteroaldehydes with azomethine ylides generated from ninhydrin and proline or sarcosine via [3+2] ...

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