Sayan Roy

Regioselective Friedel–Crafts Reaction of Electron‐Rich Benzenoid Arenes and Spiroepoxyoxindole at the Spiro‐Centre: Efficient Synthesis of Benzofuroindolines and 2<i>H</i>‐ Spiro[benzofuran]‐3,3′‐oxindoles

Saumen Hajra, Subrata Maity, Sayan Roy · Advanced Synthesis & Catalysis · 2016 · 58 citations

Electron‐rich Benzenoid Arenes, Exclusive Regioselective Synthesis, Diversity Oriented Synthesis +13

Domino Corey–Chaykovsky Reaction for One-Pot Access to Spirocyclopropyl Oxindoles

Saumen Hajra, Sayan Roy, SK Abu Saleh · Organic Letters · 2018 · 54 citations

Heterocyclic, Biochemistry, Natural Sciences +9

Light-induced Pd catalyst enables C(sp2)–C(sp2) cross-electrophile coupling bypassing the demand for transmetalation

Sudip Maiti, Pintu Ghosh, Dineshkumar Raja et al. · Nature Catalysis · 2024 · 42 citations

Chemical Engineering, Cross-coupling Reaction, Engineering +6

Reversal of Selectivity in C3-Allylation and Formal [3 + 2]-Cycloaddition of Spiro-epoxyoxindole: Unified Synthesis of Spiro-furanooxindole, (±)-<i>N</i>-Methylcoerulescine, (±)-Physovenine, and 3a-Allylhexahydropyrrolo[2,3-<i>b</i>]indole

Saumen Hajra, Sayan Roy, Subrata Maity · Organic Letters · 2017 · 36 citations

Asymmetric Catalysis, Engineering, Biochemistry +13

Photo‐Excited Nickel‐Catalyzed Silyl‐Radical‐Mediated Direct Activation of Carbamoyl Chlorides To Access (Hetero)aryl Carbamides**

Sudip Maiti, Sayan Roy, Pintu Ghosh et al. · Angewandte Chemie International Edition · 2022 · 28 citations