51. Dual gold-catalyzed regioselective synthesis of benzofulvenes via 5-endo dig
cyclization
G. Sreenivasulu, B. Sridhar and G. V. Karunakar*
Org. Biomol. Chem., 2023,21, 7799-7807. [Link]
50. Silver-catalyzed Regioselective Synthesis of N-aryl-1H-pyrazolyl-substituted
Benzenesulfonamides from Ynamides and Pyrazoles
G. V. Karunakar,* C. E. Raju, K. S. B. N. Himaja, P. Bharath Kumar and B. Sridhar.
e202300346, Doi.org/10.1002/asia.202300346 [Link]
49. Synthesis of Isoquinoline-Derived Diene Esters and Quinolin-2(1H)-ylidene-Substituted 1,5-Diones from Enynones and (Iso) Quinoline N-Oxides
G. Sreenivasulu, C. E. Raju, M. S. Palaci, B. Sridhar and G. V. Karunakar*.
Org. Lett. 2023, 25, 1, 115-119 [Link]
48. Catalyst- and Additive-Free Methodical Ring Expansion Protocol to Access
Benzooxepino-Fused Pyrroles
G. V. Karunakar*, K. Sunil, P. Bharath Kumar, M. Chandrappa, G. Ravinder, K. Srinivas and B. Sridhar.
Chem.-Asian J. 2022 [Link]
47. Gold(I)-Catalyzed Regioselective Cyclization to Access Cyclopropane-Fused
Tetrahydrobenzochromenes
P. Bharath Kumar, C. E. Raju, P. H. Chandubhai, B. Sridhar and G. V. Karunakar*.
Org. Lett. 2022, 24, 37, 6761–6766 [Link]
46. Copper(I)-Catalyzed Formation of Isoquinoline and Quinoline Substituted
Isobenzofurans.
C. E. Raju, B. Sridhar and G. V. Karunakar*.
Org. Lett. 2022, 24, 15, 2899–2904 [Link]
45. Cationic Gold‐Catalyzed Intramolecular Cyclization of Substituted 1, 5‐Diynes to
G. V. Karunakar*, C. E. Raju, G Sreenivasulu, P. Bharath Kumar, Veerabhushanam .K and B. Sridhar.
44. Gold (I)-Promoted Intermolecular Cascade Annulation to Access 2-
Hydroxybenzocarbazoles via a Meyer–Schuster Rearrangement.
V. Kadiyala, C. E. Raju, K. K. Bania, B. Sridhar and G. V. Karunakar*.
43. Gold-Catalyzed Synthesis of Pyrazolo[1,5-a ]pyridines Regioselectively via 6-endo-
dig Cyclization.
G. Sreenivasulu, V. Kadiyala, C. E. Raju, B. Sridhar and G. V. Karunakar*.
Chemistry Select, 2021, 6, 8791-8796. [Link]
42. Gold-catalyzed synthesis of 1H-isochromene-4-carbaldehydes via oxidative cascade
cyclization.
C. E. Raju, V. Kadiyala, G. Sreenivasulu, P. B. Kumar, B. Sridhar and G. V. Karunakar*
Org. Biomol. Chem., 2021, 19, 3634. [Link]
41. Gold nanoparticle supported on mesoporous vanadium oxide for photo-oxidation of 2-
naphthol with hydrogen peroxide and aerobic oxidation of benzyl alcohols.
B. Das, M. Sharma, M. J. Baruah, B. P. Mounash, G. V. Karunakar and K. K. Bania.
40. Boosting multiple photo-assisted and temperature controlled reactions with a single
redox-switchable catalyst: Solvents as internal substrates and reducing agent.
M. J. Baruah, M. Sharma, B. Das, P. Saikia, L. Saikia, S. Roy, G. V. Karunakar, P. K. Bhattacharyya and K. K. Bania.
39. Gold‐Catalyzed Regioselective Synthesis of Pyrazolo[1,4]oxazepines via
Intramolecular 7‐endo‐dig Cyclization.
Y. Thummala, C. E. Raju, D. Purnachandar, G. Sreenivasulu, V. R. Doddi and G. V. Karunakar*
38. Self pH regulated iron(II) catalyst for radical free oxidation of benzyl alcohols
B. Das, M. J Baruah, M. Sharma, B. Sarma, G. V Karunakar, L. Satyanarayana, S. Roy, P. K Bhattacharyya, K. K.
Borah, K. K Bania
37. Gold(III) promoted formation of dihydroquinazolinones: double X–H activation by gold.
Veerabhushanam. K, P. Bharath Kumar, K. Sunil, C. E. Raju, B. Sridhar and G. V. Karunakar*.
36. Gold-Catalyzed Synthesis of 6-Hydroxy Indoles from Alkynyl Cyclohexadienones and Substituted Amines.
Veerabhushanam. K, P. Bharath Kumar, B. Sridhar and G. V. Karunakar*.
J. Org. Chem. 2019, 84, 12228-12236.[Link]
35. A gold-catalyzed facile intramolecular rearrangement and cyclization sequence for synthesis of 2,5-dihydrofurans.
K. Sunil, Y. Thummala, P. Dalovai, S. Balasubramanian and G. V. Karunakar*.
Org. Biomol. Chem., 2019, 17, 6015–6024.[Link]
34. Conversion of O-propargyl β-enones to 2-allylidene 1,3-diones via [3,3]-sigmatropic rearrangement and formation of substituted furans under gold-catalysis.
V. Nagaraju, C. E. Raju, D. Purnachandar, V. Jayathirtha Rao, and G. V. Karunakar*.
33. Gold–carbene assisted formation of tetraarylmethane derivatives: double X–H activation by gold.
D. Purnachandar, K. Suneel, S. Balasubramanian and G. V. Karunakar*.
Org. Biomol. Chem., 2019, 17, 4856-4864.
32. DBU-mediated synthesis of aryl acetylenes or 1-bromoethynylarenes from aldehydes
Y. Thummala, G. V. Karunakar, V. R. Doddi.
Adv. Synth. Catal. 2019, 361, 611 – 616.
31. Gold-Catalyzed Intramolecular Regioselective 7-exo-dig Cyclization to Access Aryl- Fused Pyrazolooxazepines.
G. Ravinder, N. S. V. M. Rao, B. Sridhar and G. V. Karunakar*.
Org. Biomol. Chem., 2019, 17, 2809–2817.
30. Self pH Regulated Iron (II) Catalyst for Radical Free Oxidation of Benzyl Alcohols
B. Das, M. J Baruah, M. Sharma, B. Sarma, G. V Karunakar, L. Satyanarayana, S. Roy,
P. K Bhattacharyya, K. K. Borah, K. K Bania.
Applied Catalysis A, General 589 (2020) 117292.
29. Synthesis of medium sized aryl-fused nitrogen heterocycles via sequential aryne
aza-Claisen rearrangement/ring-closing metathesis for Radical Free Oxidation of
Benzyl Alcohols.
N. S. V. M. Rao Mangina, R. Guduru, and G. V. Karunakar*.
Org. Biomol. Chem., 2018, 16, 2134-2142.
28. DBU‐Mediated Efficient Synthesis of Diaryl Ethynes and Enynes from
1,1Dibromoalkenes at Room Temperature.
Y. Thummala, A. K. Morri, G. V. Karunakar, V. R. Doddi.
Eur J. Org. Chem., 2018, 45, 6280-6285.
[Link]
27. An indirect approach for encapsulation of chiral cobalt catalyst in microporous
Zeolite.
Y. Sharma, M., Das, B., Hazarika, A., Mangina, N.R., G. V. Karunakar, and Bania, K.K.
Microporous and Mesoporous Materials, 2018, 272, 31.
[Link]
26. Gold-Catalyzed intramolecular regioselective 7-exo-dig cyclization to access
3‑methylene-3,4-dihydrobenzo[b]oxepinones.
N. S. V. M. Rao Mangina, K. Veerabhushnam, G. Ravinder, K. Goutham, B. Sridhar and G. V. Karunakar*.
Org. Lett. 2017, 19, 282−285.[Link]
25. Gold-catalyzed intramolecular cyclization condensation sequence: synthesis of
1,2-dihydro[c][2,7]naphthyridine.
K. Goutham, V. Kadiyala, B. Sridhar and G. V. Karunakar*.
24. Silver-catalyzed synthesis of substituted carbazoles through a tandem intramolecular
hydroamination/cyclization sequence.
D. Purnachandar, K. Suneel, B. Sridhar, and G. V. Karunakar*.
23. C-Cl bond activation with Pd(II)-NiO nanoparticles supported on zeolite-Y:
The role of charge transfer transition.
M. Sharma, M. Sharma, A. Hazarika, L. Satyanarayana, G. V. Karunakar, and K. K. Bania.
22. Gold(III)-catalyzed synthesis of aroylbenzo[b] oxepin-3-ones from ortho-O-propargyl-1-
one substituted arylaldehydes.
N. S. V. M. Rao Mangina, S. Suresh, B. Sridhar, and G. V. Karunakar*.
21. Synthesis of Tetracyclic Tetrahydro-β-Carbolines via Acid-Promoted One-pot
Sequential Formation of C-C and C-N Bond.
V. Nagaraju, D. Purnachander, K. Goutham, S. Suresh, B. Sridhar, and G. V. Karunakar*.
20. Chiral Ni-schiff base complexes inside Zeolite-Y and their application in Asymmetric
Henry reaction: Effect of initial activation with microwave irradiation.
M. Sharma, B. Das, G. V. Karunakar, L. Satyanarayana, and K K. Bania.
19. Silver-Sulphur Oxido-Vanadium Cluster: A Newly Born Catalyst for Direct Reduction of
Aryl Carboxylic Acids to Aldehydes via Mars and van Krevelen Mechanism.
B. Das, M. Sharma, L. Satyanarayana, G. V. Karunakar and K. K. Bania.
Chemistryselect, 2016, 1,3750-3756.[Link]
18. Non-Hydrothermal Synthesis of Cu(I)-Microleaves from Cu (II)-Nanorods.
T. Jyoti Konch, M. Sharma, L. Satyanarayana, A. Hazarika, G. V. Karunakar, and K. K. Bania.
17. Gold-Catalyzed Intramolecular Cyclization of N-Propargylic β-Enaminones for the
Synthesis of 1,4-Oxazepine Derivatives.
K. Goutham, D. A. Kumar, S. Suresh, B. Sridhar, R. Narender, and G. V. Karunakar*.
16. Electronic, Conjugation and Confinement Effect on Structure, Redox and Catalytic
Behavior of Oxido-Vanadium (IV) and (V) Chiral Schiff Base Complexes.
M. Mandal, V. Nagaraju, G. V. Karunakar, B. Sarma, B. J. Borah, K. K Bania.
15. Chiral modification of copper exchanged zeolite-Y with cinchonidine and its
application in the asymmetric Henry reaction
J Deka, L Satyanarayana, G. V Karunakar, P. K Bhattacharyya, K. K Bania.
14. Reaction of β-Enaminones and Acetylene Dicarboxylates: Synthesis of Substituted
1,2-Dihydropyridinones.
V. Nagaraju, D. Purnachander, Mangina, Rao N. S. V. M.; S. Suresh, B. Sridhar, B. and G. V. Karunakar*.
13. Enantioselective Epoxidation of Styrene by Manganese Chiral Schiff Base Complexes
Immobilized on MCM-41
M. Mandal, V. Nagaraju, B. Sarma, G. V. Karunakar, K. Bania.
ChemPlusChem; 2015, 80, 749-761.[Link]
12. Oxidative coupling of 2-naphthol to (R)/(S)-BINOL by MCM-41 supported Mn-chiral
Schiff base complexes
K. K. Bania, G. V. Karunakar, L. Satyanarayana.
11. Gold-Catalyzed cyclisation of of N-Propargylic β-Enaminones to form 3-Methylene-
1-pyrroline Derivatives
K. Goutham, N. S. V. M. Rao Mangina, S. Suresh, P. Raghavaiah, G. V. Karunakar*.
Org. Biomo. Chem. 2014, 12, 2869–2873.
Highlighted this article in SYNFACTS 2014, 10, 684.[Link]
10. Effect of Nanospace Confinement on the Catalytic Activity and Stability of a Chiral
Schiff Base Complex (CuL; L=C22H24N2O4): A Combined Experimental and
Theoretical Study.
K. K. Bania, G. V. Karunakar, K. Goutham, and R. C. Deka.
09. Reaction of N-propargylic b-enaminones with acetylene dicarboxylates: catalyst-free
synthesis of 3-azabicyclo[4.1.0]hepta-2,4-dienes
K. Goutham, V. Nagaraju, S. Suresh, P. Raghavaiah, G. V. Karunakar*.
RSC Advances, 2014, 4, 21054–21059 [Link].
08. Enantioselective Henry Reaction Catalyzed by “Ship in a Bottle” Complexes.
K. K. Bania, G. V. Karunakar, K. Goutham and R. C. Deka.
Inorganic. Chemistry. 2013, 52, 8017−8029. [Link]
07. Formation of five and six memberd heterocyclic rings under radical cyclisation
condition (review article).
K. C. Majumdar, G. V. Karunakar, and B. Sinha.
Synthesis,2012, 44, 2475. [Link]
Post-doctoral & Ph. D. Publications
06. Gold (III)-mediated aldol condensations provide efficient access to nitrogen heterocycles,
H. Waldmann, G. V. Karunakar, K. Kumar, Org. Lett. 2008, 10, 2159.
05. Conversion of propargyl alcohols to chloroallenes and aryl alkynes using theTiCl4/Et3N reagent system.
G. V. Karunakar, M. Periasamy, J. Org. Chem. 2006,71(19), 7463.
04. A simple method for the conversion of propargyl alcohols to symmetrical 1,5-diynes using low valent titanium reagents.
G. V. Karunakar, M. Periasamy, Tetrahedron Lett. 2006, 47, 3549.
03. Synthesis of enynones from alkynes and alkynyl ketones using the TiCl4/Et3N reagent system.
M. Periasamy, G. V. Karunakar, P. Bharathi, J. Chemical Res. 2006, 566.
02. Nickle(II) complexes of tridentate N, N, O-donor ligands: synthesis, structures and redox properties.
G. V. Karunakar, N. R. Sangeetha, V. Susil, S. Pal, J. Coord. Chem.2000, 50, 51.
01. Reductive coupling of aromatic aldehydes and imines by the low-valent titanium species generated in the reaction of
TiCl4 with Et3N.
M. Periasamy, G. Srinivas, G. V. Karunakar, P. Bharathi, Tetrahedron Letters, 1999, 40, 7577.
Patents
1. A Process for the Preparation of 5-Substituted 3-(5-Nitro-4-Thiocyanatopyrimidine-2-yl)-3H-Benzo[d]-Imidazole.
G. V. Karunakar, S. Paul, R. Arul, PCT/IN2010/000221, 2010, India.