Ponnusamy Shanmugam

Synthesis of Novel Functionalized 3-Spiropyrrolizidine and 3-Spiropyrrolidine Oxindoles from Baylis−Hillman Adducts of Isatin and Heteroaldehydes with Azomethine Ylides via [3+2]-Cycloaddition

Ponnusamy Shanmugam, Baby Viswambharan, Suchithra Madhavan · Organic Letters · 2007 · 143 citations

Natural Sciences, Chemistry, Medicinal Chemistry +8

An efficient stereoselective synthesis of 3-spirocyclopentene- and 3-spiropyrazole-2-oxindoles via 1,3-dipolar cycloaddition reaction

Kodirajan Selvakumar, Vadivel Vaithiyanathan, Ponnusamy Shanmugam · Chemical Communications · 2010 · 103 citations

Natural Sciences, Chemistry, Medicinal Chemistry +13

Pyridine Core Activation <i>via</i> 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, Kodirajan Selvakumar, Suchithra Madhavan et al. · Organic Letters · 2010 · 92 citations

Pharmacy, Chemistry, Medicinal Chemistry +12

A facile and efficient synthesis of highly functionalised 3,3′-dispiropyrrolidine- and 3,3′-dispiropyrrolizidine bisoxindoles via [3+2] cycloaddition

Ponnusamy Shanmugam, Baby Viswambharan, Kodirajan Selvakumar et al. · Tetrahedron Letters · 2008 · 59 citations

Natural Sciences, Chemistry, Medicinal Chemistry +9

Heterocyclic compounds

Joseph P. John, Ponnusamy Shanmugam · Proceedings of the Indian Academy of Sciences - Section A · 1961 · 58 citations