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Saha E, Jungi H, Dabas S, Mathew A, Kuniyil R, Subramanian S, Mitra J. Amine-rich Nickel(II)-Xerogel as a Highly Active Bifunctional Metallo-organo Catalyst for Aqueous Knoevenagel Condensation and Solvent-free CO 2 Cycloaddition. Inorg Chem 2023; 62:14959-14970. [PMID: 37672483 DOI: 10.1021/acs.inorgchem.3c01669] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/08/2023]
Abstract
Metallogels formed from supramolecular interactions of low-molecular-weight gelators (LMWGs) combine the qualities of heterogeneous catalysts and offer the advantages of multifunctionality owing to the facile installation of desired task-specific moieties on the surface and along the channels of the gels. We discuss the applications of a triazole-based Ni(II) gel-derived xerogel (NiXero) having a high density of Ni(II)-nodes and appended primary amines as a recyclable heterogeneous catalyst for Knoevenagel condensation of aldehyde and malononitrile in water and the solvent-free cycloaddition of CO2 to form a series of cyclic carbonates with near-quantitative conversion of the respective epoxides, with low catalyst loading (0.59 mol %), high catalyst stability, and recyclability. The structural advantages of NiXero, due to the concurrent presence of bifunctional Lewis acid-base sites on the channels, open Ni(II) nodes, Ntriazole, pendant -NH2 and its chemical stability, are conducive to the cooperative heterogeneous catalytic activity under mild conditions. This work emphasizes the effective amalgamation of metals with purpose-built ligand systems for the construction of metallogels and their utility as heterogeneous catalysts for desired organic transformations.
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Affiliation(s)
- Ekata Saha
- Inorganic Materials & Catalysis (IMC) Division, CSIR-Central Salt & Marine Chemicals Research Institute, Gijubhai Badheka Marg, Bhavnagar 364002, Gujarat, India
- Academy of Scientific and Innovative Research (AcSIR), AcSIR Headquarters, CSIR-HRDC Campus, Sector-19, Kamla Nehru Nagar, Ghaziabad 201002, India
| | - Hiren Jungi
- Inorganic Materials & Catalysis (IMC) Division, CSIR-Central Salt & Marine Chemicals Research Institute, Gijubhai Badheka Marg, Bhavnagar 364002, Gujarat, India
- Academy of Scientific and Innovative Research (AcSIR), AcSIR Headquarters, CSIR-HRDC Campus, Sector-19, Kamla Nehru Nagar, Ghaziabad 201002, India
| | - Shilpa Dabas
- Inorganic Materials & Catalysis (IMC) Division, CSIR-Central Salt & Marine Chemicals Research Institute, Gijubhai Badheka Marg, Bhavnagar 364002, Gujarat, India
- Academy of Scientific and Innovative Research (AcSIR), AcSIR Headquarters, CSIR-HRDC Campus, Sector-19, Kamla Nehru Nagar, Ghaziabad 201002, India
| | - Abra Mathew
- Department of Chemistry, Indian Institute of Technology Palakkad (IIT Palakkad), Palakkad 678623, Kerala, India
| | - Rositha Kuniyil
- Department of Chemistry, Indian Institute of Technology Palakkad (IIT Palakkad), Palakkad 678623, Kerala, India
| | - Saravanan Subramanian
- Inorganic Materials & Catalysis (IMC) Division, CSIR-Central Salt & Marine Chemicals Research Institute, Gijubhai Badheka Marg, Bhavnagar 364002, Gujarat, India
- Academy of Scientific and Innovative Research (AcSIR), AcSIR Headquarters, CSIR-HRDC Campus, Sector-19, Kamla Nehru Nagar, Ghaziabad 201002, India
| | - Joyee Mitra
- Inorganic Materials & Catalysis (IMC) Division, CSIR-Central Salt & Marine Chemicals Research Institute, Gijubhai Badheka Marg, Bhavnagar 364002, Gujarat, India
- Academy of Scientific and Innovative Research (AcSIR), AcSIR Headquarters, CSIR-HRDC Campus, Sector-19, Kamla Nehru Nagar, Ghaziabad 201002, India
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Patel B, Dabas S, Patel P, Subramanian S. Electrostatically tuned phenols: a scalable organocatalyst for transfer hydrogenation and tandem reductive alkylation of N-heteroarenes. Chem Sci 2023; 14:540-549. [PMID: 36741513 PMCID: PMC9847667 DOI: 10.1039/d2sc05843j] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Accepted: 12/06/2022] [Indexed: 12/24/2022] Open
Abstract
One of the fundamental aims in catalysis research is to understand what makes a certain scaffold perform better as a catalyst than another. For instance, in nature enzymes act as versatile catalysts, providing a starting point for researchers to understand how to achieve superior performance by positioning the substrate close to the catalyst using non-covalent interactions. However, translating this information to a non-biological catalyst is a challenging task. Here, we report a simple and scalable electrostatically tuned phenol (ETP) as an organocatalyst for transfer hydrogenation of N-arenes using the Hantzsch ester as a hydride source. The biomimetic catalyst (1-5 mol%) displays potential catalytic activity to prepare diverse tetrahydroquinoline derivatives with good to excellent conversion under ambient reaction conditions. Kinetic studies reveal that the ETP is 130-fold faster than the uncharged counterpart, towards completion of the reaction. Control experiments and NMR spectroscopic investigations elucidate the role of the charged environment in the catalytic transformation.
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Affiliation(s)
- Brijesh Patel
- Inorganic Materials and Catalysis Division, CSIR – Central Salt & Marine Chemicals Research InstituteBhavnagar-364002GujaratIndia,Academy of Scientific and Innovative Research (AcSIR)Gaziabad-201002India
| | - Shilpa Dabas
- Inorganic Materials and Catalysis Division, CSIR – Central Salt & Marine Chemicals Research InstituteBhavnagar-364002GujaratIndia,Academy of Scientific and Innovative Research (AcSIR)Gaziabad-201002India
| | - Parth Patel
- Inorganic Materials and Catalysis Division, CSIR – Central Salt & Marine Chemicals Research InstituteBhavnagar-364002GujaratIndia,Academy of Scientific and Innovative Research (AcSIR)Gaziabad-201002India
| | - Saravanan Subramanian
- Inorganic Materials and Catalysis Division, CSIR – Central Salt & Marine Chemicals Research InstituteBhavnagar-364002GujaratIndia,Academy of Scientific and Innovative Research (AcSIR)Gaziabad-201002India
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Barik M, Mishra J, Dabas S, Chinnaraja E, Subramanian S, Subramanian PS. Modified boehmite: a choice of catalyst for the selective conversion of glycerol to five-membered dioxolane. NEW J CHEM 2022. [DOI: 10.1039/d1nj04860k] [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: 11/21/2022]
Abstract
The catalytic activity of WO3@boehmite for the acetalization of glycerol with aromatic aldehydes is described in this article. The catalyst is selective towards dioxolane (up to 96%) with excellent conversion (up to 100%) in selective substrates.
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Affiliation(s)
- Manas Barik
- Inorganic Materials and Catalysis Division, CSIR-Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), Bhavnagar 364 002, Gujarat, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Jyotiranjan Mishra
- Inorganic Materials and Catalysis Division, CSIR-Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), Bhavnagar 364 002, Gujarat, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Shilpa Dabas
- Inorganic Materials and Catalysis Division, CSIR-Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), Bhavnagar 364 002, Gujarat, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Eswaran Chinnaraja
- Inorganic Materials and Catalysis Division, CSIR-Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), Bhavnagar 364 002, Gujarat, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Saravanan Subramanian
- Inorganic Materials and Catalysis Division, CSIR-Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), Bhavnagar 364 002, Gujarat, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Palani S. Subramanian
- Inorganic Materials and Catalysis Division, CSIR-Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI), Bhavnagar 364 002, Gujarat, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
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Patel P, Tak RK, Parmar B, Dabas S, Patel B, Suresh E, Khan NUH, Subramanian S. Ring-opening hydrolysis of spiro-epoxyoxindoles using a reusable sulfonic acid functionalized nitrogen rich carbon catalyst. RSC Adv 2021; 11:12808-12814. [PMID: 35423816 PMCID: PMC8697273 DOI: 10.1039/d1ra01161h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Accepted: 03/15/2021] [Indexed: 01/02/2023] Open
Abstract
Controlling the product selectivity of a ring-opening hydrolysis reaction remains a great challenge with mineral acids and to an extent with homogeneous catalysts. In addition, even trace amounts of metal impurities in a bioactive product hinder the reaction progress. This has necessitated the development of robust and metal-free catalysts to offer an alternative sustainable route. We report a nitrogen-rich sulfonated carbon as a catalyst derived from an inexpensive precursor for the synthesis of bioactive vicinal diols of spiro-oxindole derivatives. The well-characterized catalyst shows wide generality with different electronic and steric substituents in the substrates under mild reaction conditions. Hot filtration test confirms no leaching of the acid moiety and the catalyst could be reused for four cycles with retention of activities.
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Affiliation(s)
- Parth Patel
- Inorganic Materials and Catalysis Division, CSIR-Central Salt & Marine Chemicals Research Institute G. B. Marg Bhavnagar-364002 Gujarat India
- Charotar University of Science and Technology Changa Anand-388421 Gujarat India
| | - Raj Kumar Tak
- Inorganic Materials and Catalysis Division, CSIR-Central Salt & Marine Chemicals Research Institute G. B. Marg Bhavnagar-364002 Gujarat India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad-201002 India
| | - Bhavesh Parmar
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad-201002 India
- Analytical and Environmental Science Division and Centralized Instrument Facility CSIR-Central Salt & Marine Chemicals Research Institute G. B. Marg Bhavnagar-364 002 Gujarat India
| | - Shilpa Dabas
- Inorganic Materials and Catalysis Division, CSIR-Central Salt & Marine Chemicals Research Institute G. B. Marg Bhavnagar-364002 Gujarat India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad-201002 India
| | - Brijesh Patel
- Inorganic Materials and Catalysis Division, CSIR-Central Salt & Marine Chemicals Research Institute G. B. Marg Bhavnagar-364002 Gujarat India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad-201002 India
| | - Eringathodi Suresh
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad-201002 India
- Analytical and Environmental Science Division and Centralized Instrument Facility CSIR-Central Salt & Marine Chemicals Research Institute G. B. Marg Bhavnagar-364 002 Gujarat India
| | - Noor-Ul H Khan
- Inorganic Materials and Catalysis Division, CSIR-Central Salt & Marine Chemicals Research Institute G. B. Marg Bhavnagar-364002 Gujarat India
- Charotar University of Science and Technology Changa Anand-388421 Gujarat India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad-201002 India
| | - Saravanan Subramanian
- Inorganic Materials and Catalysis Division, CSIR-Central Salt & Marine Chemicals Research Institute G. B. Marg Bhavnagar-364002 Gujarat India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad-201002 India
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Gupta K, Dabas S. To evaluate oncological and quality of life outcomes between robotic and open neck dissection for oral cavity cancers: A prospective trial. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy438.004] [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: 11/14/2022] Open
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Rajappa S, Bhakuni Y, Ram D, Shukla H, Ranjan R, Dewan A, Dabas S, Dewan A. A gland of diverse pathology and unpredictable behaviour: our experience of primary submandibular gland malignancies. Int J Oral Maxillofac Surg 2018; 47:1243-1249. [DOI: 10.1016/j.ijom.2018.05.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Revised: 04/22/2018] [Accepted: 05/07/2018] [Indexed: 10/16/2022]
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Gaurav A, Gupta V, Koul R, Dabas S, Sareen R, Geeta K, Arora V, Parikh PM, Aggarwal S. Practical consensus recommendatons for Paget's disease in breast cancer. South Asian J Cancer 2018; 7:83-86. [PMID: 29721469 PMCID: PMC5909301 DOI: 10.4103/sajc.sajc_107_18] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Paget's disease of the breast is a rare type of cancer of the nipple-areola complex and that is often associated with an underlying in situ or invasive carcinoma. Diagnosis and treatment of Paget's disease is controversial. Expert oncologists discuss on the update on the approaches of Paget's disease diagnosis and its treatment options. This expert group used data from published literature, practical experience and opinion of a large group of academic oncologists to arrive at this practical consensus recommendations for the benefit of community oncologists.
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Affiliation(s)
- A. Gaurav
- Department of Endocrinology and Surgery, SGPGI, Lucknow, Uttar Pradesh, India
| | - V. Gupta
- Department of Surgical Oncology, BLK Super Specialty Hospital, New Delhi, India
| | - R. Koul
- Department of Surgical Oncology, Sir Ganga Ram Hospital, New Delhi, India
| | - S. Dabas
- Department of Surgical Oncology, Fortis Memorial Research Institute, Gurugram, Haryana, India
| | - R. Sareen
- Department of Surgical Oncology, Indraprastha Apollo Hospital, New Delhi, India
| | - K. Geeta
- Department of Surgical Oncology, Max Hospital, New Delhi, India
| | - V. Arora
- Department of Surgery, Sir Ganga Ram Hospital, New Delhi, India
| | - Purvish M. Parikh
- Department of Oncology, Shalby Cancer and Research Institute, Mumbai, Maharashtra, India
| | - S. Aggarwal
- Department of Medical Oncology, Sir Ganga Ram Hospital, New Delhi, India
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Gupta K, Dabas S. Oncological outcome following intensification of treatment by transoral robotic surgery (TORS) for HPV negative stage IV oropharyngeal cancer: A prospective trial. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx665.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Singh RP, Tripathi RD, Dabas S, Rizvi SMH, Ali MB, Sinha SK, Gupta DK, Mishra S, Rai UN. Effect of lead on growth and nitrate assimilation of Vigna radiata (L.) Wilczek seedlings in a salt affected environment. Chemosphere 2003; 52:1245-1250. [PMID: 12821005 DOI: 10.1016/s0045-6535(03)00318-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The inhibition of seedling growth and nitrate reductase activity in 5 d old Vigna radiata (L.) Wilczek cv. Pusa Baisakhi in the presence of 1.0 mM lead acetate increased drastically, if NaCl (6 and 12 EC) was also present in the nutrient media along with the metal salt. Correspondingly higher endogenous Na+ levels were accumulated in the roots and leaves of seedlings in presence of the two stresses. On the other hand, the levels of endogenous lead get reduced in presence of NaCl in both the roots and leaves. Roots accumulated more Pb2+ and Na+ than the leaves. The two stresses affect more drastically in the additive or even synergistic manner during the early growth phase of the seedlings.
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Affiliation(s)
- R P Singh
- Department of Biosciences, M.D. University, Rohtak 124001, India
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