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Garai B, Das A, Kumar DV, Sundararaju B. Enantioselective C-H bond functionalization under Co(III)-catalysis. Chem Commun (Camb) 2024; 60:3354-3369. [PMID: 38441168 DOI: 10.1039/d3cc05329f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/22/2024]
Abstract
While progress in enantioselective C-H functionalization has been accomplished by employing 4d and 5d transition metal-based catalysts, the rapid depletion of these metals in the earth's crust poses a serious threat to making these protocols sustainable. On the other hand, because of their unique reactivity, low toxicity, and high earth abundance, newer strategies utilizing affordable 3d transition metals have come to the forefront. Among the first-row transition metals, high-valent cobalt has recently attracted a lot of attention for catalytic C-H functionalization with mono and bidentate directing groups. This approach was extended for asymmetric catalysis due to a fairly thorough knowledge of its catalytic cycles. Four major themes have been investigated as a result of this insight: (1) rational design of a chiral Cp#Co(III)-catalyst, (2) chiral carboxylic acid with achiral Cp*Co(III)-catalysts using monodentate directing groups, (3) cobalt/salox-based systems, and (4) cobalt/chiral phosphoric acid-based hybrid systems with bidentate directing groups. Herein, we highlight the recent developments in high-valent cobalt-catalyzed enantioselective C-H functionalization up to October 2023, with the strong belief that the current state-of-the-art can attract considerable interest in the synthetic community, encouraging discoveries in the evolving landscape of asymmetric catalysis.
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Affiliation(s)
- Bholanath Garai
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh - 208016, India.
| | - Abir Das
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh - 208016, India.
| | - Doppalapudi Vineet Kumar
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh - 208016, India.
| | - Basker Sundararaju
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh - 208016, India.
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2
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Das A, Mandal R, Ravi Sankar HS, Kumaran S, Premkumar JR, Borah D, Sundararaju B. Reversal of Regioselectivity in Asymmetric C-H Bond Annulation with Bromoalkynes under Cobalt Catalysis. Angew Chem Int Ed Engl 2024; 63:e202315005. [PMID: 38095350 DOI: 10.1002/anie.202315005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Indexed: 12/30/2023]
Abstract
Metal-catalyzed asymmetric C-H bond annulation strategy offers a versatile platform, allowing the construction of complex P-chiral molecules through atom- and step-economical fashion. However, regioselective insertion of π-coupling partner between M-C bond with high enantio-induction remain elusive. Using commercially available Co(II) salt and chiral-Salox ligands, we demonstrate an unusual protocol for the regio-reversal, enantioselective C-H bond annulation of phosphinamide with bromoalkyne through desymmetrization. The reaction proceeds through ligand-assisted enantiodetermining cyclocobaltation followed by regioselective insertion of bromoalkyne between Co-C, subsequent reductive elimination, and halogen exchange with carboxylate resulted in P-stereogenic compounds in excellent ee (up to >99 %). The isolation of cobaltacycle involved in the catalytic cycle and the outcome of control experiments provide support for a plausible mechanism.
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Affiliation(s)
- Abir Das
- Department of Chemistry, Indian Institution of Technology Kanpur, 208016, Kanpur, Uttar Pradesh, India
| | - Rajib Mandal
- Department of Chemistry, Indian Institution of Technology Kanpur, 208016, Kanpur, Uttar Pradesh, India
| | | | - Subramani Kumaran
- Department of Chemistry, Indian Institution of Technology Kanpur, 208016, Kanpur, Uttar Pradesh, India
| | - J Richard Premkumar
- PG & Research Department of Chemistry, Bishop Heber College, 620017, Tiruchirappalli, Tamil Nadu, India
| | - Dipanti Borah
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, 400076, Mumbai, Maharashtra, India
| | - Basker Sundararaju
- Department of Chemistry, Indian Institution of Technology Kanpur, 208016, Kanpur, Uttar Pradesh, India
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3
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Tafese BN, Ganesh T, Solomon A, Sundararaju B, Garg N, Alebachew B. Efficient Adsorptive Removal of Methylene Blue Dye from Aqueous Solution Using Eragrostis Teff Biomass-Derived Nitrogen and Phosphorus-Codoped Carbon Quantum Dots. Langmuir 2024; 40:72-83. [PMID: 38147594 DOI: 10.1021/acs.langmuir.3c01813] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2023]
Abstract
Carbon quantum dots have a great application potential in environmental protection via adsorption technology due to their large specific surface area and negative zeta potential. In this work, nitrogen and phosphorus-codoped carbon quantum dots (NP-CQDs) with a large specific surface area and negative zeta potential were successfully synthesized by a single-step hydrothermal synthesis. Batch adsorption studies were utilized to assess the adsorbent's capacity to remove common methylene blue (MB) dye contaminants from an aqueous solution. The experiment showed that MB dye could be removed in 30 min under optimum experimental conditions, with a removal efficiency of 93.73%. The adsorbent's large surface area of 526.063 m2/g and negative zeta potential of -12.3 mV contribute to the high removal efficiency. The Freundlich isotherm model fits the adsorption process well at 298 K, with R2 and n values of 0.99678 and 4.564, respectively, indicating its applicability. A kinetic study demonstrated that the pseudo-second-order model, rather than the pseudo-first-order model, is more suited to represent the process of MB dye adsorption onto NP-CQDs. This research established a simple and cost-effective method for developing a highly efficient NP-CQD adsorbent for organic dye degradation by adsorption.
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Affiliation(s)
- Bisrat Nigusie Tafese
- Department of Materials Science and Engineering, School of Mechanical, Chemical, and Materials Engineering (SoMCME), Adama Science and Technology University (ASTU), P.O. Box 1888, Adama 1888, Ethiopia
| | - Thothadri Ganesh
- Department of Materials Science and Engineering, School of Mechanical, Chemical, and Materials Engineering (SoMCME), Adama Science and Technology University (ASTU), P.O. Box 1888, Adama 1888, Ethiopia
| | - Abraham Solomon
- Department of Materials Science and Engineering, School of Mechanical, Chemical, and Materials Engineering (SoMCME), Adama Science and Technology University (ASTU), P.O. Box 1888, Adama 1888, Ethiopia
| | - Basker Sundararaju
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208 016, India
| | - Nidhi Garg
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208 016, India
| | - Biruk Alebachew
- Department of Soft Matter Physics, University of Potsdam, Am Neuen Palais 10, Potsdam 14469, Germany
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4
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Dahiya P, Garg N, Poli R, Sundararaju B. Hydrogenation and dehydrogenation of N-heterocycles under Cp*Co(III)-catalysis. Dalton Trans 2023; 52:14752-14756. [PMID: 37814805 DOI: 10.1039/d3dt03161f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/11/2023]
Abstract
To realize the goal of a carbon-free energy economy, it is crucial to discover reactions that utilize sustainable resources as alternatives to fossil feedstocks. In this study, a well-defined, air-stable Cp*Co(III)-catalyst for transfer hydrogenation of quinoline derivatives and oxidative dehydrogenation of cyclic amines in water is developed. While the former reaction is promoted by formic acid as a transfer hydrogenation reagent, the latter is mediated by molecular oxygen as the sole oxidant. These processes provide new avenues for the investigation of air-stable cobalt catalysts for environmentally benign hydrogenation and dehydrogenation reactions.
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Affiliation(s)
- Pardeep Dahiya
- Department of chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, India - 208 016.
| | - Nidhi Garg
- Department of chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, India - 208 016.
| | - Rinaldo Poli
- CNRS, LCC (Laboratoire de Chimie de Coordination), Université de Toulouse, UPS, INPT, 205 Route de Narbonne, BP 44099, F-31077, Toulouse Cedex 4, France
- Institut Universitaire de France, 1, rue Descartes, 75231 Paris Cedex 05, France
| | - Basker Sundararaju
- Department of chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, India - 208 016.
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Pradhan S, Chakraborty P, Paira S, Sundararaju B. Allenyl Carbonate as a Butadiene Surrogate in Cobalt-Catalyzed Crotylation of Aldehydes. J Org Chem 2023; 88:5893-5899. [PMID: 37071873 DOI: 10.1021/acs.joc.3c00288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/20/2023]
Abstract
Allenyl carbonate was used as a 1,3-butadiene surrogate to develop a photocatalytically sustainable protocol for cobalt-catalyzed crotylation of aldehydes. The developed method tolerated a wide range of aromatic and aliphatic aldehydes with retention of functional groups under mild conditions and produced good-to-excellent yields of crotylated secondary alcohols. Based on preliminary mechanistic studies and literature precedents, a plausible mechanism is proposed.
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Affiliation(s)
- Subhankar Pradhan
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | - Priyanka Chakraborty
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | - Soumen Paira
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | - Basker Sundararaju
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
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Abstract
The C(8)-selective nucleophilic cascade cyclization of quinoline N-oxide with easily derived 1,6-enyne from phenol derivatives is demonstrated. A variety of quinoline N-oxide and alkynes are discovered to be suitable for producing a library of quinoline N-oxide tethered cis-hydrobenzofurans with high yields and excellent functional group tolerance. The utility of the protocol has been accomplished by post-synthetic modification of the cyclized product. The mechanistic studies indicate a base-assisted internal electrophilic-type substitution (BIES)-type pathway for C-H bond activation, and electrospray ionization mass spectrometry (ESI-MS) analysis of the stoichiometric reaction confirmed the formation of a key five-membered cobaltacycle.
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Affiliation(s)
- Bholanath Garai
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208 016, India
| | - Molla Rahamat Ali
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208 016, India
| | - Rajib Mandal
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208 016, India
| | - Basker Sundararaju
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208 016, India
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Chakraborty P, Pradhan S, Richard Premkumar J, Sundararaju B. Valorization of Terpenols Under Iron Catalysis. J Catal 2023. [DOI: 10.1016/j.jcat.2023.03.031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/30/2023]
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Garg N, Somasundharam HP, Dahiya P, Sundararaju B. Methanol as a hydrogen source: room-temperature highly-selective transfer hydrogenation of α,β-unsaturated ketones. Chem Commun (Camb) 2022; 58:9930-9933. [PMID: 35979880 DOI: 10.1039/d2cc03597a] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The described system offers an ideal, user-friendly protocol for the chemoselective homogeneous hydrogenation of α,β-unsaturated ketones at room temperature using methanol as a liquid organic hydrogen carrier. Excellent yields were achieved with an in situ-prepared phosphine-free Cp*Ir(III)/bipyridonate complex. Chemoselective reduction with other reducible functionalities and late-stage functionalization were also explored.
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Affiliation(s)
- Nidhi Garg
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, 208 016, India.
| | | | - Pardeep Dahiya
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, 208 016, India.
| | - Basker Sundararaju
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, 208 016, India.
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9
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Emayavaramban B, Chakraborty P, Dahiya P, Sundararaju B. Iron-Catalyzed α-Methylation of Ketones Using Methanol as the C1 Source under Photoirradiation. Org Lett 2022; 24:6219-6223. [PMID: 35960264 DOI: 10.1021/acs.orglett.2c02545] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A mild, environmentally benign approach for α-methylation of ketones utilizing methanol as the C1 source under visible light has been developed. The reaction conditions were favorable for a wide range of ketones with both aromatic and aliphatic backbones, allowing for good-to-excellent yields of the respective products. The tentative mechanism is postulated after preliminary mechanistic and kinetic experiments.
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Affiliation(s)
| | - Priyanka Chakraborty
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | - Pardeep Dahiya
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | - Basker Sundararaju
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
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10
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Dahiya P, Sarkar A, Sundararaju B. Well‐defined [Cp*Co(N,O)I]‐Catalysts for Site‐selective Intramolecular C‐H Amidation. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200385] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Affiliation(s)
- Rajib Mandal
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh208016, India
| | - Bholanath Garai
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh208016, India
| | - Basker Sundararaju
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh208016, India
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12
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Chakraborty P, Mandal R, Paira S, Sundararaju B. C-H bond functionalization by dual catalysis: merging of high-valent cobalt and photoredox catalysis. Chem Commun (Camb) 2021; 57:13075-13083. [PMID: 34779804 DOI: 10.1039/d1cc04872d] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The merger of transition metal catalysis and photocatalysis has emerged as a versatile platform that opened the gateway to diverse low-energy pathways for several synthetic transformations. However, amidst the first-row transition metals, directed C-H bond functionalization mediated by high-valent cobalt catalysis has advanced with rising momentum owing to its unique reactivity and the ability to participate in both one- and two-electron transfer reactions. However, the use of expensive, privileged Cp* ligands or use of stoichiometric silver(I) or manganese(III) is unavoidable. Despite significant advances in their respective fields, the combination of these two "green" approaches to further the vested interest of the scientific research community towards the development of ecofriendly and sustainable protocols is noticeably limited. Thus, the methodology based on high-cobalt-photoredox dual-catalytic strategy has high dormant potential and is worthy to explore. Herein, we highlight the recent advances in the high-valent cobalt-catalyzed sustainable catalytic approach by harnessing light energy for oxidative C-H bond functionalization. With this, we hope to inspire the development of unexplored cobalt-photoredox-catalyzed reactions with improved efficiency and selectivity.
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Affiliation(s)
- Priyanka Chakraborty
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh - 208016, India.
| | - Rajib Mandal
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh - 208016, India.
| | - Soumen Paira
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh - 208016, India.
| | - Basker Sundararaju
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh - 208016, India.
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13
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Mandal R, Barsu N, Garai B, Das A, Perekalin D, Sundararaju B. Room-temperature C-H bond alkynylation by merging cobalt and photocatalysts. Chem Commun (Camb) 2021; 57:12167-12170. [PMID: 34726212 DOI: 10.1039/d1cc05263b] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new protocol is developed for the mono- and bis-ortho-C-H alkynylation of easily accessible benzamide derivatives using alkynyl bromides at room temperature by merging cobalt and photocatalysts. The diverse reactivity of various alkynyl bromides towards the C-H alkynylation and competing C-H/N-H bond annulation reactions has been demonstrated to give the corresponding products in good yields with excellent functional group tolerance.
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Affiliation(s)
- Rajib Mandal
- Department of chemistry, Indian Institute of technology Kanpur, Kanpur, Uttar Pradesh, 208016, India.
| | - Nagaraju Barsu
- Department of chemistry, Indian Institute of technology Kanpur, Kanpur, Uttar Pradesh, 208016, India.
| | - Bholanath Garai
- Department of chemistry, Indian Institute of technology Kanpur, Kanpur, Uttar Pradesh, 208016, India.
| | - Abir Das
- Department of chemistry, Indian Institute of technology Kanpur, Kanpur, Uttar Pradesh, 208016, India.
| | - Dmitry Perekalin
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilova str., Moscow, Russia
| | - Basker Sundararaju
- Department of chemistry, Indian Institute of technology Kanpur, Kanpur, Uttar Pradesh, 208016, India.
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15
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Affiliation(s)
- Priyanka Chakraborty
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208016, India
| | - Basker Sundararaju
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208016, India
| | - Eric Manoury
- CNRS, LCC (Laboratoire de Chimie de Coordination), Université de Toulouse, UPS, INPT, 205 Route de Narbonne, BP 44099, Toulouse Cedex 4 F-31077, France
| | - Rinaldo Poli
- CNRS, LCC (Laboratoire de Chimie de Coordination), Université de Toulouse, UPS, INPT, 205 Route de Narbonne, BP 44099, Toulouse Cedex 4 F-31077, France
- Institut Universitaire de France, 1, Rue Descartes, Paris Cedex 05 75231, France
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16
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Kolos AV, Nelyubina YV, Sundararaju B, Perekalin DS. Synthesis of Overloaded Cyclopentadienyl Rhodium(III) Complexes via Cyclotetramerization of tert-Butylacetylene. Organometallics 2021. [DOI: 10.1021/acs.organomet.1c00403] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Andrey V. Kolos
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilova str., Moscow 119991, Russian Federation
| | - Yulia V. Nelyubina
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilova str., Moscow 119991, Russian Federation
| | - Basker Sundararaju
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208 016, India
| | - Dmitry S. Perekalin
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, 28 Vavilova str., Moscow 119991, Russian Federation
- G.V. Plekhanov Russian University of Economics, 36 Stremyanny per., Moscow 117997, Russian Federation
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17
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Bandyopadhyay U, Sundararaju B, Poli R, Manoury E, Daran JC. Synthesis and crystallographic studies of 2-(di-phenyl-phosphino-thio-yl)-2-(3-oxobut-1-en-yl)ferrocene. Acta Crystallogr E Crystallogr Commun 2021; 77:853-856. [PMID: 34422314 PMCID: PMC8340968 DOI: 10.1107/s205698902100760x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Accepted: 07/26/2021] [Indexed: 11/16/2022]
Abstract
The title molecule is built up from a ferrocene unit disubstituted by an S-protected diphenylphosphine group and by a methylvinylketone chain. In the crystal, weak C—H⋯O and C—H⋯S interactions build a two-dimensional network. As a follow-up to our research on the chemistry of disubstituted ferrocene derivatives, the synthesis and the structure of the title compound, 2-(diphenylphosphinothioyl)-2-(3-oxobut-1-en-yl)ferrocene, [Fe(C5H5)(C21H18OPS)], are described. The molecule is built up from a ferrocene unit disubstituted by an S-protected diphenylphosphine group and by a methylvinylketone chain. The crystal structure features weak C—H⋯O and C—H⋯S interactions, which build a two-dimensional network. This structure is compared to that of the related disubstituted diphenylphosphino ferrocene.
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Affiliation(s)
- Uchchhal Bandyopadhyay
- CNRS, LCC (Laboratoire de Chimie de Coordination), Université de Toulouse, UPS, INPT, 205 Route de Narbonne, F-31077 Toulouse Cedex 4, France
| | - Basker Sundararaju
- Department of Chemistry, Indian Institute of Technology Kanpur, Uttar Pradesh, India
| | - Rinaldo Poli
- CNRS, LCC (Laboratoire de Chimie de Coordination), Université de Toulouse, UPS, INPT, 205 Route de Narbonne, F-31077 Toulouse Cedex 4, France
| | - Eric Manoury
- CNRS, LCC (Laboratoire de Chimie de Coordination), Université de Toulouse, UPS, INPT, 205 Route de Narbonne, F-31077 Toulouse Cedex 4, France
| | - Jean-Claude Daran
- CNRS, LCC (Laboratoire de Chimie de Coordination), Université de Toulouse, UPS, INPT, 205 Route de Narbonne, F-31077 Toulouse Cedex 4, France
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Abstract
An efficient protocol for the synthesis of biologically essential pyrroloquinolinones has been developed under Cp*CoIII catalysis, which involves a cascade reaction of C(7)-H alkenylation with alkynes followed by nucleophilic addition. A wide variety of internal alkynes including enyne, diyne, and ynamide and more challenging terminal alkynes were successfully employed for the annulation in good to excellent yield with high regioselectivity.
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Affiliation(s)
- Rajib Mandal
- Fine Chemical Laboratory, Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, India 208016
| | - Bholanath Garai
- Fine Chemical Laboratory, Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, India 208016
| | - Basker Sundararaju
- Fine Chemical Laboratory, Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, India 208016
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19
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Garg N, Sarkar A, Sundararaju B. Recent developments on methanol as liquid organic hydrogen carrier in transfer hydrogenation reactions. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2020.213728] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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20
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Affiliation(s)
- Pardeep Dahiya
- Department of Chemistry Indian Institute of Technology Kanpur Kanpur 208 016 Uttar Pradesh India
| | - Manoj Kumar Gangwar
- Department of Chemistry Indian Institute of Technology Kanpur Kanpur 208 016 Uttar Pradesh India
| | - Basker Sundararaju
- Department of Chemistry Indian Institute of Technology Kanpur Kanpur 208 016 Uttar Pradesh India
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21
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Chakraborty P, Garg N, Manoury E, Poli R, Sundararaju B. C-Alkylation of Various Carbonucleophiles with Secondary Alcohols under CoIII-Catalysis. ACS Catal 2020. [DOI: 10.1021/acscatal.0c01728] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Priyanka Chakraborty
- Department of Chemistry, Indian Institute of Technology Kanpur, 208016 Kanpur, Uttar Pradesh, India
| | - Nidhi Garg
- Department of Chemistry, Indian Institute of Technology Kanpur, 208016 Kanpur, Uttar Pradesh, India
| | - Eric Manoury
- CNRS, LCC (Laboratoire de Chimie de Coordination), Université de Toulouse, UPS, INPT, 205 Route de Narbonne, F-31077 Toulouse Cedex 4, France
| | - Rinaldo Poli
- CNRS, LCC (Laboratoire de Chimie de Coordination), Université de Toulouse, UPS, INPT, 205 Route de Narbonne, F-31077 Toulouse Cedex 4, France
| | - Basker Sundararaju
- Department of Chemistry, Indian Institute of Technology Kanpur, 208016 Kanpur, Uttar Pradesh, India
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22
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Affiliation(s)
- Nidhi Garg
- Department of ChemistryIndian Institution of Technology Kanpur Kanpur Uttar Pradesh 208016 India)
| | - Soumen Paira
- Department of ChemistryIndian Institution of Technology Kanpur Kanpur Uttar Pradesh 208016 India)
| | - Basker Sundararaju
- Department of ChemistryIndian Institution of Technology Kanpur Kanpur Uttar Pradesh 208016 India)
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23
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Khan B, Dwivedi V, Sundararaju B. Cp*Co(III)‐Catalyzed
o
‐Amidation of Benzaldehydes with Dioxazolones Using Transient Directing Group Strategy. Adv Synth Catal 2020. [DOI: 10.1002/adsc.201901267] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Bhuttu Khan
- Department of ChemistryIndian Institute of Technology Kanpur, Kanpur Uttar Pradesh India- 208 016
| | - Vikas Dwivedi
- Department of ChemistryIndian Institute of Technology Kanpur, Kanpur Uttar Pradesh India- 208 016
| | - Basker Sundararaju
- Department of ChemistryIndian Institute of Technology Kanpur, Kanpur Uttar Pradesh India- 208 016
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24
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Chakraborty P, Gangwar MK, Emayavaramban B, Manoury E, Poli R, Sundararaju B. α-Alkylation of Ketones with Secondary Alcohols Catalyzed by Well-Defined Cp*Co III -Complexes. ChemSusChem 2019; 12:3463-3467. [PMID: 31240858 DOI: 10.1002/cssc.201900990] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2019] [Revised: 06/10/2019] [Indexed: 05/20/2023]
Abstract
Although α-alkylation of ketones with primary alcohols by transition-metal catalysis is well-known, the same process with secondary alcohols is arduous and complicated by self-condensation. Herein a well-defined, high-valence cobalt(III)-catalyst was applied for successful α-alkylation of ketones with secondary alcohols. A wide-variety of secondary alcohols, which include cyclic, acyclic, symmetrical, and unsymmetrical compounds, was employed as alkylating agents to produce β-alkyl aryl ketones.
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Affiliation(s)
- Priyanka Chakraborty
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, 208 016, India
| | - Manoj Kumar Gangwar
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, 208 016, India
| | - Balakumar Emayavaramban
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, 208 016, India
| | - Eric Manoury
- Fine CNRS, LCC (Laboratoire de Chimie de Coordination), Université de Toulouse, UPS, INPT, 205 Route de Narbonne, F-31077, Toulouse Cedex 4, France
| | - Rinaldo Poli
- Fine CNRS, LCC (Laboratoire de Chimie de Coordination), Université de Toulouse, UPS, INPT, 205 Route de Narbonne, F-31077, Toulouse Cedex 4, France
| | - Basker Sundararaju
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, 208 016, India
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25
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Affiliation(s)
- Vikas Dwivedi
- Department of ChemistryIndian Institute of Technology Kanpur Kanpur Uttar Pradesh 208 016 India
| | - Deepti Kalsi
- Department of ChemistryIndian Institute of Technology Kanpur Kanpur Uttar Pradesh 208 016 India
| | - Basker Sundararaju
- Department of ChemistryIndian Institute of Technology Kanpur Kanpur Uttar Pradesh 208 016 India
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26
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Emayavaramban B, Chakraborty P, Sundararaju B. Cobalt-Catalyzed Reductive Alkylation of Amines with Carboxylic Acids. ChemSusChem 2019; 12:3089-3093. [PMID: 30418691 DOI: 10.1002/cssc.201802144] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Revised: 11/12/2018] [Indexed: 06/09/2023]
Abstract
Direct reductive alkylation of amines with carboxylic acid is carried out by using an inexpensive, air-stable cobalt/triphos catalytic system with molecular hydrogen as the reductant. This efficient synthetic method proceeds through reduction and condensation, followed by reduction of the in situ-generated imine into the amine in a green catalytic process.
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Affiliation(s)
- Balakumar Emayavaramban
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, 208 016, India
| | - Priyanka Chakraborty
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, 208 016, India
| | - Basker Sundararaju
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, 208 016, India
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27
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Abstract
We report here the first high-valent cobalt(iii)-catalyzed direct alkylation of aromatic amines with secondary alcohols.
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Affiliation(s)
| | | | - Eric Manoury
- Fine CNRS
- LCC (Laboratoire de Chimie de Coordination)
- Université de Toulouse
- UPS
- INPT
| | - Rinaldo Poli
- Fine CNRS
- LCC (Laboratoire de Chimie de Coordination)
- Université de Toulouse
- UPS
- INPT
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28
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Kalsi D, Barsu N, Chakrabarti S, Dahiya P, Rueping M, Sundararaju B. C–H and N–H bond annulation of aryl amides with unactivated olefins by merging cobalt(iii) and photoredox catalysis. Chem Commun (Camb) 2019; 55:11626-11629. [DOI: 10.1039/c9cc05744g] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A mild, environment-friendly protocol has been developed to carry out the [4+2] annulation of aryl amides with unactivated olefins.
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Affiliation(s)
- Deepti Kalsi
- Department of Chemistry
- Indian Institute of Technology Kanpur
- India
| | - Nagaraju Barsu
- Department of Chemistry
- Indian Institute of Technology Kanpur
- India
| | | | - Pardeep Dahiya
- Department of Chemistry
- Indian Institute of Technology Kanpur
- India
| | - Magnus Rueping
- Institute of Organic Chemistry
- RWTH Aachen University
- Aachen D-52074
- Germany
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29
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Gangwar MK, Dahiya P, Emayavaramban B, Sundararaju B. Cp*Co III -Catalyzed Efficient Dehydrogenation of Secondary Alcohols. Chem Asian J 2018; 13:2445-2448. [PMID: 29863804 DOI: 10.1002/asia.201800697] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2018] [Revised: 06/01/2018] [Indexed: 11/09/2022]
Abstract
A novel, well-defined molecular Cp*CoIII complex was isolated and structurally characterized for the first time. The efficiency of this cobalt catalyst was demonstrated in the alcohol dehydrogenation and dehydrative coupling of secondary alcohols under mild conditions into ketones and ethers, respectively.
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Affiliation(s)
- Manoj Kumar Gangwar
- Fine Chemicla Laboratory, Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, 208 016, India
| | - Pardeep Dahiya
- Fine Chemicla Laboratory, Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, 208 016, India
| | - Balakumar Emayavaramban
- Fine Chemicla Laboratory, Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, 208 016, India
| | - Basker Sundararaju
- Fine Chemicla Laboratory, Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, 208 016, India
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30
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Affiliation(s)
- Deepti Kalsi
- Fine Chemical Laboratory, Department of Chemistry, Indian Institute of Technology, Kanpur 208 016, India
| | - Subhradeep Dutta
- Fine Chemical Laboratory, Department of Chemistry, Indian Institute of Technology, Kanpur 208 016, India
| | - Nagaraju Barsu
- Fine Chemical Laboratory, Department of Chemistry, Indian Institute of Technology, Kanpur 208 016, India
| | - Magnus Rueping
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, Aachen D-52074, Germany
| | - Basker Sundararaju
- Fine Chemical Laboratory, Department of Chemistry, Indian Institute of Technology, Kanpur 208 016, India
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31
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Affiliation(s)
- Nimmakuri Rajesh
- Fine Chemical Laboratory; Department of Chemistry; Indian Institute of Technology Kanpur; Kanpur Uttar Pradesh 208016 India
| | - Basker Sundararaju
- Fine Chemical Laboratory; Department of Chemistry; Indian Institute of Technology Kanpur; Kanpur Uttar Pradesh 208016 India
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32
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Mandal R, Emayavaramban B, Sundararaju B. Cp*Co(III)-Catalyzed C–H Alkylation with Maleimides Using Weakly Coordinating Carbonyl Directing Groups. Org Lett 2018; 20:2835-2838. [DOI: 10.1021/acs.orglett.8b00761] [Citation(s) in RCA: 65] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Rajib Mandal
- Fine Chemical Laboratory, Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, India
| | - Balakumar Emayavaramban
- Fine Chemical Laboratory, Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, India
| | - Basker Sundararaju
- Fine Chemical Laboratory, Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, India
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33
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Kalsi D, Barsu N, Sundararaju B. CoIII
-Catalyzed Isonitrile Insertion/Acyl Group Migration Between C−H and N−H bonds of Arylamides. Chemistry 2018; 24:2360-2364. [DOI: 10.1002/chem.201705710] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Indexed: 11/09/2022]
Affiliation(s)
- Deepti Kalsi
- Fine Chemical Laboratory, Department of Chemistry; Indian Institute of Technology Kanpur; Uttar Pradesh India
| | - Nagaraju Barsu
- Fine Chemical Laboratory, Department of Chemistry; Indian Institute of Technology Kanpur; Uttar Pradesh India
| | - Basker Sundararaju
- Fine Chemical Laboratory, Department of Chemistry; Indian Institute of Technology Kanpur; Uttar Pradesh India
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34
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Abstract
Utilization of anthropogenic greenhouse gas CO2 for catalytic C–C bond formation via conversion to essentially valuable C1 synthons like CO is very challenging.
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Affiliation(s)
- Nagaraju Barsu
- Department of Chemistry
- Indian Institute of Technology Kanpur
- India
| | - Deepti Kalsi
- Department of Chemistry
- Indian Institute of Technology Kanpur
- India
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35
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Sen M, Rajesh N, Emayavaramban B, Premkumar JR, Sundararaju B. Isolation of Cp*Co III -Alkenyl Intermediate in Efficient Cobalt-Catalyzed C-H Alkenylation with Alkynes. Chemistry 2017; 24:342-346. [PMID: 29164708 DOI: 10.1002/chem.201705183] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Indexed: 11/07/2022]
Abstract
A general and efficient procedure for C-H alkenylation of arenes with a broad substrate scope catalyzed by Cp*CoIII was demonstrated with alkynes. A highly selective mono-alkenylation and sequential bis-C-H bond functionalization was displayed to exemplify the versatility of the cobalt catalyst. Isolation of cationic Cp*CoIII -alkenyl intermediate was achieved under identical catalytic conditions to further establish the proposed pathway.
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Affiliation(s)
- Malay Sen
- Fine Chemical Laboratory, Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, India
| | - Nimmakuri Rajesh
- Fine Chemical Laboratory, Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, India
| | - Balakumar Emayavaramban
- Fine Chemical Laboratory, Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, India
| | - J Richard Premkumar
- Department of Chemistry, Bishop Heber College (Autonomous), Tiruchirappalli, Tamilnadu, India
| | - Basker Sundararaju
- Fine Chemical Laboratory, Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, India
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36
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Sen M, Mandal R, Das A, Kalsi D, Sundararaju B. Cp*CoIII
-Catalyzed Bis-isoquinolone Synthesis by C−H Annulation of Arylamide with 1,3-Diyne. Chemistry 2017; 23:17454-17457. [DOI: 10.1002/chem.201704155] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2017] [Indexed: 12/27/2022]
Affiliation(s)
- Malay Sen
- Fine Chemical Laboratory; Department of Chemistry; Indian Institute of Technology Kanpur; Kanpur Uttar Pradesh India
| | - Rajib Mandal
- Fine Chemical Laboratory; Department of Chemistry; Indian Institute of Technology Kanpur; Kanpur Uttar Pradesh India
| | - Ashis Das
- Fine Chemical Laboratory; Department of Chemistry; Indian Institute of Technology Kanpur; Kanpur Uttar Pradesh India
| | - Deepti Kalsi
- Fine Chemical Laboratory; Department of Chemistry; Indian Institute of Technology Kanpur; Kanpur Uttar Pradesh India
| | - Basker Sundararaju
- Fine Chemical Laboratory; Department of Chemistry; Indian Institute of Technology Kanpur; Kanpur Uttar Pradesh India
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37
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Affiliation(s)
- Nagaraju Barsu
- Fine Chemical Laboratory; Department of Chemistry; Indian Institute of Technology Kanpur; 208016 Kanpur Uttar Pradesh India
| | - Balakumar Emayavaramban
- Fine Chemical Laboratory; Department of Chemistry; Indian Institute of Technology Kanpur; 208016 Kanpur Uttar Pradesh India
| | - Basker Sundararaju
- Fine Chemical Laboratory; Department of Chemistry; Indian Institute of Technology Kanpur; 208016 Kanpur Uttar Pradesh India
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38
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Affiliation(s)
- Malay Sen
- Fine
Chemical Laboratory, Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | - Pardeep Dahiya
- Fine
Chemical Laboratory, Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | - J. Richard Premkumar
- Department
of Chemistry, Vivekananda College of Arts and Sciences for Women, Tiruchengode, Tamilnadu 637 205, India
| | - Basker Sundararaju
- Fine
Chemical Laboratory, Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
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39
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Abstract
A simple efficient, atom-economical procedure was developed for the cobalt-catalyzed C–H bond annulation of benzamides with isonitriles under mild conditions. The reaction tolerates a variety of functional group including heterocycles. Diverse 3-(alkylimino)-2-quinolin-8-yl-2,3-dihydro-1H-isoindol-1-ones were synthesized using isonitriles as the C1 source through C–H and N–H bond annulation via C–H bond activation in a ‘green’ solvent. Vinylamides were also used similarly with tert-butyl isonitrile to give 3-(tert-butylimino)-1-quinolin-8-yl-1H-pyrrol-2(5H)-ones.
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Affiliation(s)
- Deepti Kalsi
- Fine Chemical Laboratory, Department of Chemistry, Indian Institute of Technology Kanpur
| | - Nagaraju Barsu
- Fine Chemical Laboratory, Department of Chemistry, Indian Institute of Technology Kanpur
| | - Pardeep Dahiya
- Fine Chemical Laboratory, Department of Chemistry, Indian Institute of Technology Kanpur
| | - Basker Sundararaju
- Fine Chemical Laboratory, Department of Chemistry, Indian Institute of Technology Kanpur
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40
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Abstract
A new procedure for oxidative coupling of aromatic and acrylic acids with alkynes has been developed using abundant, nontoxic, and air stable Cp*Co(III) catalyst. The coupling involves initial cyclometalation via weak chelation-assisted C-H bond activation followed by alkyne coordination, insertion, and reductive elimination leading to diverse isocoumarins (α-pyranones) in good yields under mild conditions.
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Affiliation(s)
- Rajib Mandal
- Fine Chemical Laboratory, Department of Chemistry, Indian Institute of Technology Kanpur 208016, Uttar Pradesh, India
| | - Basker Sundararaju
- Fine Chemical Laboratory, Department of Chemistry, Indian Institute of Technology Kanpur 208016, Uttar Pradesh, India
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41
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Abstract
A general efficient regioselective cobalt catalyzed carbonylation of unactivated C(sp3)-H bonds of aliphatic amides was demonstrated using atmospheric (1-2 atm) carbon monoxide as a C1 source. This straightforward approach provides access to α-spiral succinimide regioselectively in a good yield. Cobalt catalyzed sp3 C-H bond carbonylation is reported for the first time including the functionalization of (β)-C-H bonds of α-1°, 2°, 3° carbons and even internal (β)-C-H bonds. Our initial mechanistic investigation reveals that the C-H activation step is irreversible and will possibly be the rate determining step.
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Affiliation(s)
- Nagaraju Barsu
- Fine Chemical Laboratory , Department of Chemistry , Indian Institute of Technology Kanpur , Kanpur , Uttar Pradesh , India .
| | - Shyam Kumar Bolli
- Fine Chemical Laboratory , Department of Chemistry , Indian Institute of Technology Kanpur , Kanpur , Uttar Pradesh , India .
| | - Basker Sundararaju
- Fine Chemical Laboratory , Department of Chemistry , Indian Institute of Technology Kanpur , Kanpur , Uttar Pradesh , India .
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42
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Affiliation(s)
- Balakumar Emayavaramban
- Fine
Chemical Laboratory, Department of Chemistry, Indian Institute of Technology—Kanpur, Kanpur 208016, India
| | - Malay Sen
- Fine
Chemical Laboratory, Department of Chemistry, Indian Institute of Technology—Kanpur, Kanpur 208016, India
| | - Basker Sundararaju
- Fine
Chemical Laboratory, Department of Chemistry, Indian Institute of Technology—Kanpur, Kanpur 208016, India
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43
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Kalsi D, Laskar RA, Barsu N, Premkumar JR, Sundararaju B. C-8-Selective Allylation of Quinoline: A Case Study of β-Hydride vs β-Hydroxy Elimination. Org Lett 2016; 18:4198-201. [DOI: 10.1021/acs.orglett.6b01845] [Citation(s) in RCA: 111] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Deepti Kalsi
- Fine
Chemical Laboratory, Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208016, India
| | - Roshayed A. Laskar
- Fine
Chemical Laboratory, Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208016, India
| | - Nagaraju Barsu
- Fine
Chemical Laboratory, Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208016, India
| | - J. Richard Premkumar
- Center
for Molecular Modelling, Indian Institute of Chemical Technology, Hyderabad 500007, India
| | - Basker Sundararaju
- Fine
Chemical Laboratory, Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh 208016, India
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44
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Affiliation(s)
- Nagaraju Barsu
- Fine Chemical Laboratory; Department of Chemistry; Indian Institute of Technology Kanpur; Kanpur, Uttar Pradesh 208016 India
| | - Md. Atiur Rahman
- Fine Chemical Laboratory; Department of Chemistry; Indian Institute of Technology Kanpur; Kanpur, Uttar Pradesh 208016 India
| | - Malay Sen
- Fine Chemical Laboratory; Department of Chemistry; Indian Institute of Technology Kanpur; Kanpur, Uttar Pradesh 208016 India
| | - Basker Sundararaju
- Fine Chemical Laboratory; Department of Chemistry; Indian Institute of Technology Kanpur; Kanpur, Uttar Pradesh 208016 India
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45
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Sen M, Emayavaramban B, Barsu N, Premkumar JR, Sundararaju B. Cp*Co(III)-Catalyzed C(sp3)–H Bond Activation: A Highly Stereoselective and Regioselective Alkenylation of 8-Methylquinoline with Alkynes. ACS Catal 2016. [DOI: 10.1021/acscatal.6b00612] [Citation(s) in RCA: 147] [Impact Index Per Article: 18.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Malay Sen
- Fine
Chemical Laboratory, Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur−208016, Uttar Pradesh, India
| | - Balakumar Emayavaramban
- Fine
Chemical Laboratory, Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur−208016, Uttar Pradesh, India
| | - Nagaraju Barsu
- Fine
Chemical Laboratory, Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur−208016, Uttar Pradesh, India
| | - J. Richard Premkumar
- Center
for Molecular Modelling, Indian Institute of Chemical Technology, Hyderabad−500 067, India
| | - Basker Sundararaju
- Fine
Chemical Laboratory, Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur−208016, Uttar Pradesh, India
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46
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Abstract
Allylic amination, directly from alcohols, has been demonstrated without any Lewis acid activators using an efficient and regiospecific molecular iron catalyst. Various amines and alcohols were employed and the reaction proceeded through the oxidation/reduction (redox) pathway. A direct one-step synthesis of common drugs, such as cinnarizine and nafetifine, was exhibited from cinnamyl alcohol that produced water as side product.
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Affiliation(s)
- Balakumar Emayavaramban
- Fine Chemical Laboratory, Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, India
| | - Moumita Roy
- Fine Chemical Laboratory, Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, India
| | - Basker Sundararaju
- Fine Chemical Laboratory, Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, India.
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47
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Barsu N, Sen M, Premkumar JR, Sundararaju B. Cobalt(iii) catalyzed C-8 selective C–H and C–O coupling of quinoline N-oxide with internal alkynes via C–H activation and oxygen atom transfer. Chem Commun (Camb) 2016; 52:1338-41. [DOI: 10.1039/c5cc08736h] [Citation(s) in RCA: 121] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
An efficient, scalable, atom-economical, regio-selective air stable Cp*Co(iii) catalyzed C–H and C–O coupling via a C–H activation/oxygen atom transfer reaction of quinoline N-oxide and an internal alkyne is reported.
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Affiliation(s)
- Nagaraju Barsu
- Fine Chemical Laboratory
- Department of Chemistry
- Indian Institute of Technology Kanpur
- Kanpur
- India
| | - Malay Sen
- Fine Chemical Laboratory
- Department of Chemistry
- Indian Institute of Technology Kanpur
- Kanpur
- India
| | - J. Richard Premkumar
- Center for Molecular Modelling
- Indian Institute of Chemical Technology
- Hyderabad – 500 067
- India
| | - Basker Sundararaju
- Fine Chemical Laboratory
- Department of Chemistry
- Indian Institute of Technology Kanpur
- Kanpur
- India
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48
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Affiliation(s)
- Deepti Kalsi
- Fine Chemical Laboratory,
Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, India
| | - Basker Sundararaju
- Fine Chemical Laboratory,
Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, Uttar Pradesh, India
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49
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Sen M, Kalsi D, Sundararaju B. Cobalt(III)-Catalyzed Dehydrative [4+2] Annulation of Oxime with Alkyne by CH and NOH Activation. Chemistry 2015; 21:15529-33. [DOI: 10.1002/chem.201503643] [Citation(s) in RCA: 172] [Impact Index Per Article: 19.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2015] [Revised: 09/11/2015] [Indexed: 02/02/2023]
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50
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Barsu N, Kalsi D, Sundararaju B. Carboxylate Assisted Ni-Catalyzed CH Bond Allylation of Benzamides. Chemistry 2015; 21:9364-8. [DOI: 10.1002/chem.201500639] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2015] [Indexed: 11/06/2022]
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