General Chemistry, Organic Chemistry, Materials Science, Spectroscopy
399
Scopus Publications
9741
Scholar Citations
51
Scholar h-index
255
Scholar i10-index
Scopus Publications
Smallest acyclic tricationic molecule containing a Bis(phosphine)-stabilized low-valent triantimony-based Unit Nilanjana Mukherjee, Benjamin Peerless, Vincent L. Nadurata, Vikas Kumar, Mayur P. Sangole, Kirandeep Singh, Haakon T. A. Wiedemann, Christopher W. M. Kay, Robert Kruk, Florian Weigend, Stefanie Dehnen, Rajesh G. Gonnade, Cem B. Yildiz, Moumita Majumdar Nature Communications, 2026 Element-element bonded multiply charged cationic species are well known as dimers or small cyclic oligomers in the condensed phase. However, the smallest acyclic version, a trinuclear unit possessing greater than a monocationic charge, has remained elusive. Here we introduce a bis(phosphine) supported low valent triantimony-based tricationic compound as a new entrant in this field. Structural elucidation and electronic understanding reveal a W-shaped tricationic unit comprising of a three-center four-electron sigma-bonded triantimony moiety that is terminally capped by bis(phosphine) ligands, with the central antimony atom having two lone pairs of electrons. The unique counter trianion [Sb(O)2(OTf)4]3– (OTf = CF3SO3) possesses reactive polar Sbδ+–Oδ– bonds, the structure of which is determined from single crystal X-ray diffraction analysis. The ensemble of reactive molecular fragments found in this highly charged antimony-based compound makes it thermally unstable. Nonetheless, this fully characterized fleeting species shows a diverse reactivity profile, advancing the isolation of various novel antimony compounds, including the formation of a distinct low-valent antimony-cobalt carbonyl cluster. Element-element bonded multiply charged cationic species are well known as dimers or small cyclic oligomers in the condensed phase but the smallest acyclic version, a trinuclear unit possessing greater than a monocationic charge, has remained elusive. Here the authors report a bis(phosphine) supported low valent triantimony-based tricationic compound.
Modular Synthesis of Triaroyl Cyclopropanes via a Formal Cyclotrimerization of Phenacyl Bromides and Their Transformation into Diazabicycles Hrutik Madhavrao Jadhav, Santhosh Penta, Lavanya Lahari Pannuri, Chilukuri Rangarao, Rajesh G. Gonnade, Rajesh Manda Organic Letters, 2026 Step-efficient cyclotrimerization reactions are entrancing approaches for saturated carbocycles. In this context, we demonstrate the α-bromocarbonyl (1+1+1) cyclotrimerization modularity to obtain stereoselective trisubstituted cyclopropanes under metal-free conditions. These cyclopropanes were condensed with hydrazine to afford diazabicyclic adducts and further expanded through a ring expansion reaction. In contrast to the classical alkylating reactivity, α-bromocarbonyl cyclotrimerization was also achieved by using various nucleophiles. A wide range of bromoacyl substrates established the broad scope of the transformation.
NHC-Based Diazo Compounds: Pathways to N2 Liberation or Dimerization Kajal Balayan, Prabhakar Tiwari, Himanshu Sharma, Kumar Vanka, Rajesh G. Gonnade, Sakya S. Sen Journal of Organic Chemistry, 2026 We previously reported the C–H bond cleavage of Me 3 SiCHN 2 by 1,3-bis(2,6-diisopropylphenyl)-imidazolin-2-ylidene (5-SIPr) to form 1 . In this article, we showed that electron-poor diamido carbene 5- t BuDAC also cleaves the C–H bond of Me 3 SiCHN 2 to form 5, unlike its ring-expanded congener 6-DippDAC, which forms N-heterocyclic methylene hydrazine. The divergence of reactivity has been explained with the help of DFT studies. Further divergence occurs when 1 and 5 were reacted with HCl. While dimerization was observed with 5-SIPr based diazoalkane to give quinoidal tetrazine ( 2 ), N 2 elimination occurs from 5- t BuDAC based diazoalkane to afford 7 and 8 . This contrasting behavior highlights the subtle yet profound influence of the N-heterocyclic carbene (NHC) framework on the fate of the diazo units. DFT studies shed light about the mechanism for the formation of 2 as well as reveal that N 2 elimination is thermodynamically favored over dimerization for 5 .
Unveiling the reactivity of N-heterocyclic methylene hydrazines Kajal Balayan, Arindam Biswas, Himanshu Sharma, Prabhakar Tiwari, Kumar Vanka, Rajesh G. Gonnade, Arup K. Rath, Sakya S. Sen Dalton Transactions, 2026 The reactivity of N-heterocyclic methylene hydrazines, 1 and 2 undergo base-free HCN elimination with TCNE, yielding highly conjugated molecules (5 and 6) with significantly reduced HOMO–LUMO energy gaps and distinct NIR emission.
Divergent Synthesis of Meyers’ Lactams and Medium Lactams via Cyclocondensation of γ-Ylidene-Butanolides with Chiral Amino Alcohols Megha V. Sadanande, Paridhi Sharma, Rajesh G. Gonnade, Ravindar Kontham Journal of Organic Chemistry, 2026 A novel methodology for constructing Meyers’ lactams (pyrrolidino-oxazolidines), related to biologically potent natural and synthetic scaffolds, has been developed via an unprecedented tandem cyclocondensation of chiral 2-amino alcohols and γ-ylidene-butanolides. The process proceeds through the initial formation of an ene-lactam intermediate, followed by a Bro̷nsted acid (PPTS)-catalyzed ring closure. Under stoichiometric amounts of a Lewis acid (TiCl 4 ), the same set of building blocks affords medium lactams featuring eight-membered ring systems with an exo -enol ether segment. This divergent synthetic strategy enables the efficient generation of a library of Meyers’ lactams and medium lactams with good yields and diastereoselectivity.
Switchable solid-state emission in GFP chromophore analogue cocrystals via competing AIE and ACQ pathways Bhupendra P. Mali, Niteen B. Dabke, Himanshu Sharma, Soumya Ranjan Dash, Kochunnoonny Manoj, Kumar Vanka, Rajesh G. Gonnade Crystengcomm, 2026 A coformer-guided crystal engineering strategy enables tunable green–orange–ACQ emission switching in GFPc analogue cocrystals by precisely modulating π-stacking and charge-transfer pathways.
Tridentate NacNac Tames T-Shaped Nickel(I) Radical Sanjukta Pahar, Vishal Sharma, K. Vipin Raj, Mayur P. Sangole, Christy P. George, Kirandeep Singh, Kumar Vanka, Rajesh G. Gonnade, Sakya S. Sen Chemistry A European Journal, 2024
Unsymmetrical sp2-sp3 Disilenes Milan Kumar Bisai, Tamal Das, Kumar Vanka, Rajesh G. Gonnade, Sakya S. Sen Angewandte Chemie International Edition, 2021
Self-Assembled Helical Arrays for the Stabilization of the Triplet State Aakash D. Nidhankar, Goudappagouda, Divya S. Mohana Kumari, Shailendra Kumar Chaubey, Rashmi Nayak, Rajesh G. Gonnade, G. V. Pavan Kumar, Retheesh Krishnan, Sukumaran Santhosh Babu Angewandte Chemie International Edition, 2020
Synthesis and biological activity of imidazole based 1,4-naphthoquinones Dinkar Choudhari, Sunita Salunke-Gawali, Debamitra Chakravarty, Samir R. Shaikh, Dipali N. Lande, Shridhar P. Gejji, Pradeep Kumar Rao, Surekha Satpute, Vedavati G. Puranik, Rajesh Gonnade New Journal of Chemistry, 2020
The Aryne [2,3] Stevens Rearrangement Tony Roy, Manikandan Thangaraj, Trinadh Kaicharla, Rupa V. Kamath, Rajesh G. Gonnade, Akkattu T. Biju Organic Letters, 2016
Ester vs. amide on folding: A case study with a 2-residue synthetic peptide Kuruppanthara N. Vijayadas, Roshna V. Nair, Rupesh L. Gawade, Amol S. Kotmale, Panchami Prabhakaran, Rajesh G. Gonnade, Vedavadi G. Puranik, Pattuparambil R. Rajamohanan, Gangadhar J. Sanjayan Organic and Biomolecular Chemistry, 2013
The ant-pro reverse-turn motif. Structural features and conformational characteristics Vijaykumar H. Thorat, Tukaram S. Ingole, Kuruppanthara N. Vijayadas, Roshna V. Nair, Sangram S. Kale, Veera V. E. Ramesh, Hilda C. Davis, Panchami Prabhakaran, Rajesh G. Gonnade, Rupesh L. Gawade, Vedavati G. Puranik, Pattuparambil R. Rajamohanan, Gangadhar J. Sanjayan European Journal of Organic Chemistry, 2013
Enantioselective synthesis of L-CCG-I Subhash P. Chavan, Pallavi Sharma, Rasapalli Sivappa, Mohan M. Bhadbhade, Rajesh G. Gonnade, Uttam R. Kalkote Journal of Organic Chemistry, 2003
A dinuclear bis(bipyridine)ruthenium(II) complex, [(bpy)2RuII{L2-}RuII2(bpy) 2]2+, incorporating an unusual non-innocent bridging ligand containing a p-benzoquinonediimine fragment: Synthesis, structure, redox, and UV/VIS/NIR and EPR spectroelectrochemical properties Journal of the Chemical Society Dalton Transactions, 2002
Modular Synthesis of Triaroyl Cyclopropanes via a Formal Cyclotrimerization of Phenacyl Bromides and Their Transformation into Diazabicycles HM Jadhav, S Penta, LL Pannuri, C Rangarao, RG Gonnade, R Manda Organic Letters , 2026 2026
NHC-Based Diazo Compounds: Pathways to N 2 Liberation or Dimerization K Balayan, P Tiwari, H Sharma, K Vanka, RG Gonnade, SS Sen The Journal of Organic Chemistry , 2026 2026
Divergent Synthesis of Meyers’ Lactams and Medium Lactams via Cyclocondensation of γ-Ylidene-Butanolides with Chiral Amino Alcohols MV Sadanande, P Sharma, RG Gonnade, R Kontham The Journal of Organic Chemistry 91 (14), 5138-5158 , 2026 2026
Smallest acyclic tricationic molecule containing a Bis (phosphine)-stabilized low-valent triantimony-based Unit N Mukherjee, B Peerless, VL Nadurata, V Kumar, MP Sangole, K Singh, ... Nature Communications , 2026 2026
Novel Cocrystal of Quercetagetin: In vitro and in vivo Insights into Biopharmaceutical Performance S Suryawanshi, P Shaligram, RG Gonnade, S Patil Pharmaceutical Research, 1-13 , 2026 2026
Reactions of saturated NHC• boranes with electron deficient alkyne and alkene. Borirane formation, their reactivities, and coupling of tetracyanoethylene PR Amrutha, G Kundu, VL Ganesh, RG Gonnade, G Gopakumar, SS Sen Dalton Transactions , 2026 2026
Unveiling the reactivity of N-heterocyclic methylene hydrazines K Balayan, A Biswas, H Sharma, P Tiwari, K Vanka, RG Gonnade, ... Dalton Transactions 55 (14), 5432-5436 , 2026 2026 Citations: 1
Switchable solid-state emission in GFP chromophore analogue cocrystals via competing AIE and ACQ pathways BP Mali, NB Dabke, H Sharma, SR Dash, K Manoj, K Vanka, ... CrystEngComm 28 (11), 1775-1780 , 2026 2026
Exploring the interplay of electron density distribution and electrostatic potential in the interaction of nilutamide and flutamide with androgen receptors using quantum … H Balasubramanian, K Poomani, S Kandasamy, VR Hathwar, ... RSC advances 16 (5), 3830-3849 , 2026 2026
Transition metal complexes of Thiadiazole-Picolinic acid: Crystal structures, DFT insights and anticancer activity B Torambetov, G Khojabaeva, MK Bharty, SK Gupta, S Kadirova, ... Journal of Molecular Structure, 144763 , 2025 2025 Citations: 3
Structural characterisation, anticancer properties, and BSA binding of 2, 6-dipyrazinylpyridines: Insights from experiment and theory S Enumula, J Shaikh, A Shaikh, KN Sheikh, P Tambe, DN Lande, SP Gejji, ... Journal of Molecular Structure, 144225 , 2025 2025
Efficient Copper‐Catalyzed, One‐Pot Synthesis of N 2 ‐Aryl Phosphoryl 1,2,3‐Triazole 1‐Oxides M Mujahid, AA Bhavar, V Vara, R Gonnade, M Muthukrishnan Asian Journal of Organic Chemistry 14 (10), e00162 , 2025 2025
Cocrystals of the Green Fluorescence Protein Chromophore Analogue: Coformer-Induced Switch between AIE and ACQ S Suresh, NB Dabke, R Pandya, K Vanka, M Dutta, RG Gonnade Crystal Growth & Design 25 (18), 7473-7488 , 2025 2025
Quality by Design‐Based Development and Validation of a Stability‐Indicating RP‐HPLC Method for Quantitative Estimation of Enzalutamide in Eutectic Mixtures VI Wannur, AS Patil, B Sawadi, R Koli, PS Shaligram, N shet, ... Separation Science Plus 8 (9), e70119 , 2025 2025 Citations: 5
Synthesis, crystal structure, DFT calculation and catalytic activity of a polymer complex of zinc (II) succinate with 2-amino-1, 3, 4-thiadiazole G Nuralieva, M Alieva, B Torambetov, DBC Leslee, B Senthilkumar, ... Journal of Molecular Structure 1338, 142274 , 2025 2025 Citations: 7
Unified Photoredox-Catalyzed Aerobic Oxidative Dynamic Kinetic Asymmetric Transformation for C–N Atropoisomers Mediated by Chiral Organophosphites P Saikia, M Aarthika, A Bhattacharjya, S Maity, P Bajpai, A Bera, A Saha, ... Organic Letters 27 (30), 8171-8177 , 2025 2025
Synthesis, crystal structure and Hirshfeld surface analysis of bis [2-amino-5-(ethylsulfanyl)-1, 3, 4-thiadiazol-3-ium] bis (perchlorato-κO) bis (picolinato-κ2N, O) copper (II) G Khojabaeva, B Torambetov, RG Gonnade, Z Uzakbergenova, ... Structure Reports 81 (7) , 2025 2025 Citations: 3
Synthesis, crystal structure and Hirshfeld surface analysis of 5-methyl-2-[(1, 3-thiazol-2-yl) sulfanyl]-1, 3, 4-thiadiazole E Kinshakova, B Torambetov, MK Bharty, A Atashov, A Rasulov, ... Structure Reports 81 (7) , 2025 2025 Citations: 2
Desymmetrization of myo-inositol NT Patil, MT Patil, RG Gonnade, MS Shashidhar Carbohydrate Research 553, 109505 , 2025 2025 Citations: 1
Magnesium-Catalyzed Primary, Secondary, and Tertiary Amide Hydroboration B Mahata, V Devaraj, SR Dash, RG Gonnade, K Vanka, SS Sen Inorganic Chemistry 64 (26), 13405-13414 , 2025 2025 Citations: 4
MOST CITED SCHOLAR PUBLICATIONS
Studies on the reversible aggregation of cysteine-capped colloidal silver particles interconnected via hydrogen bonds S Mandal, A Gole, N Lala, R Gonnade, V Ganvir, M Sastry Langmuir 17 (20), 6262-6268 , 2001 2001 Citations: 324
Enantioselective synthesis of spirocyclohexadienones by NHC‐catalyzed formal [3+ 3] annulation reaction of enals SR Yetra, S Mondal, S Mukherjee, RG Gonnade, AT Biju Angewandte Chemie 128 (1), 276-280 , 2016 2016 Citations: 195
A new BIS-Andrographolide Ether from Andrographis paniculata Nees and evaluation of anti-HIV activity VL Niranjan Reddy, S Malla Reddy, V Ravikanth, P Krishnaiah, ... Natural Product Research 19 (3), 223-230 , 2005 2005 Citations: 188
Lewis acid catalyzed selective reactions of donor–acceptor cyclopropanes with 2‐naphthols T Kaicharla, T Roy, M Thangaraj, RG Gonnade, AT Biju Angewandte Chemie 128 (34), 10215-10218 , 2016 2016 Citations: 139
An ultrahydrophobic fluorous metal–organic framework derived recyclable composite as a promising platform to tackle marine oil spills S Mukherjee, AM Kansara, D Saha, R Gonnade, D Mullangi, B Manna, ... Chemistry–A European Journal 22 (31), 10937-10943 , 2016 2016 Citations: 122
NHC‐catalyzed desymmetrization of n‐aryl maleimides leading to the atroposelective synthesis of N‐Aryl succinimides S Barik, S Shee, S Das, RG Gonnade, G Jindal, S Mukherjee, AT Biju Angewandte Chemie 133 (22), 12372-12376 , 2021 2021 Citations: 120
N‐Heterocyclic‐Carbene‐Catalyzed Umpolung of Imines A Patra, S Mukherjee, TK Das, S Jain, RG Gonnade, AT Biju Angewandte Chemie International Edition 56 (10), 2730-2734 , 2017 2017 Citations: 115
Highly emissive organic solids with remarkably broad color tunability based on N, C-chelate, four-coordinate organoborons AC Shaikh, DS Ranade, S Thorat, A Maity, PP Kulkarni, RG Gonnade, ... Chemical Communications 51 (89), 16115-16118 , 2015 2015 Citations: 115
Asymmetric N-heterocyclic carbene (NHC)-catalyzed annulation of modified enals with enolizable aldehydes SR Yetra, T Kaicharla, SS Kunte, RG Gonnade, AT Biju Organic Letters 15 (20), 5202-5205 , 2013 2013 Citations: 112
Efficient broad-band emission from contorted purely corner-shared one dimensional (1D) organic lead halide perovskite A Biswas, R Bakthavatsalam, SR Shaikh, A Shinde, A Lohar, S Jena, ... Chemistry of Materials 31 (7), 2253-2257 , 2019 2019 Citations: 110
Synthesis and biological evaluation of bile acid dimers linked with 1, 2, 3-triazole and bis-β-lactam NS Vatmurge, BG Hazra, VS Pore, F Shirazi, MV Deshpande, S Kadreppa, ... Organic & Biomolecular Chemistry 6 (20), 3823-3830 , 2008 2008 Citations: 105
Multicomponent reactions involving arynes, quinolines, and aldehydes A Bhunia, D Porwal, RG Gonnade, AT Biju Organic letters 15 (17), 4620-4623 , 2013 2013 Citations: 97
Unified strategy for nickel-catalyzed C-2 alkylation of indoles through chelation assistance V Soni, RA Jagtap, RG Gonnade, B Punji ACS Catalysis 6 (9), 5666-5672 , 2016 2016 Citations: 93
Studies on CL-20/HMX (2: 1) cocrystal: a new preparation method and structural and thermokinetic analysis M Ghosh, AK Sikder, S Banerjee, RG Gonnade Crystal Growth & Design 18 (7), 3781-3793 , 2018 2018 Citations: 90
Exploration of click reaction for the synthesis of modified nucleosides as chitin synthase inhibitors PM Chaudhary, SR Chavan, F Shirazi, M Razdan, P Nimkar, ... Bioorganic & medicinal chemistry 17 (6), 2433-2440 , 2009 2009 Citations: 90
Topochemical click reaction: spontaneous self‐stitching of a monosaccharide to linear oligomers through lattice‐controlled azide–alkyne cycloaddition A Pathigoolla, RG Gonnade, KM Sureshan Angewandte Chemie International Edition 51 (18), 4362-4366 , 2012 2012 Citations: 89
Efficient synthesis of 9-aryldihydrophenanthrenes by a cascade reaction involving arynes and styrenes SS Bhojgude, A Bhunia, RG Gonnade, AT Biju Organic Letters 16 (3), 676-679 , 2014 2014 Citations: 86
Substrate-Controlled Selectivity Switch in the Three-Component Coupling Involving Arynes, Aromatic Tertiary Amines, and CO 2 SS Bhojgude, T Roy, RG Gonnade, AT Biju Organic letters 18 (20), 5424-5427 , 2016 2016 Citations: 83
Intramolecular ipso-arylative cyclization of aryl-alkynoates and N-arylpropiolamides with aryldiazonium salts through merged gold/visible light photoredox catalysis AH Bansode, SR Shaikh, RG Gonnade, NT Patil Chemical Communications 53 (65), 9081-9084 , 2017 2017 Citations: 79
Halogen bonding in 2, 5-dichloro-1, 4-benzoquinone: insights from experimental and theoretical charge density analysis VR Hathwar, RG Gonnade, P Munshi, MM Bhadbhade, TN Guru Row Crystal growth & design 11 (5), 1855-1862 , 2011 2011 Citations: 79