1
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Rathod S, Arya S, Kanike S, Shah SA, Bahadur P, Tiwari S. Advances on nanoformulation approaches for delivering plant-derived antioxidants: A case of quercetin. Int J Pharm 2022; 625:122093. [PMID: 35952801 DOI: 10.1016/j.ijpharm.2022.122093] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2022] [Revised: 07/21/2022] [Accepted: 08/04/2022] [Indexed: 10/15/2022]
Abstract
Oxidative stress has been implicated in tumorigenic, cardiovascular, neuro-, and age-related degenerative changes. Antioxidants minimize the oxidative damage through neutralization of reactive oxygen species (ROS) and other causative agents. Ever since the emergence of COVID-19, plant-derived antioxidants have received enormous attention, particularly in the Indian subcontinent. Quercetin (QCT), a bio-flavonoid, exists in the glycosylated form in fruits, berries and vegetables. The antioxidant potential of QCT analogs relates to the number of free hydroxyl groups in their structure. Despite presence of these groups, QCT exhibits substantial hydrophobicity. Formulation scientists have tested nanotechnology-based approaches for its improved solubilization and delivery to the intended site of action. By the virtue of its hydrophobicity, QCT gets encapsulated in nanocarriers carrying hydrophobic domains. Apart from passive accumulation, active uptake of such formulations into the target cells can be facilitated through well-studied functionalization strategies. In this review, we have discussed the approaches of improving solubilization and bioavailability of QCT with the use of nanoformulations.
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Affiliation(s)
- Sachin Rathod
- UKA Tarsadia University, Maliba Pharmacy College, Gopal-Vidyanagar Campus, Surat 394350, India
| | - Shristi Arya
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER) - Raebareli, Lucknow 226002, India
| | - Shirisha Kanike
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER) - Raebareli, Lucknow 226002, India
| | - Shailesh A Shah
- UKA Tarsadia University, Maliba Pharmacy College, Gopal-Vidyanagar Campus, Surat 394350, India
| | - Pratap Bahadur
- Department of Chemistry, Veer Narmad South Gujarat University, Surat 395007, India
| | - Sanjay Tiwari
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER) - Raebareli, Lucknow 226002, India.
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2
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Lin D, Jiang S, Zhang A, Wu T, Qian Y, Shao Q. Structural derivatization strategies of natural phenols by semi-synthesis and total-synthesis. NATURAL PRODUCTS AND BIOPROSPECTING 2022; 12:8. [PMID: 35254538 PMCID: PMC8901917 DOI: 10.1007/s13659-022-00331-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Accepted: 02/15/2022] [Indexed: 05/08/2023]
Abstract
Structural derivatization of natural products has been a continuing and irreplaceable source of novel drug leads. Natural phenols are a broad category of natural products with wide pharmacological activity and have offered plenty of clinical drugs. However, the structural complexity and wide variety of natural phenols leads to the difficulty of structural derivatization. Skeleton analysis indicated most types of natural phenols can be structured by the combination and extension of three common fragments containing phenol, phenylpropanoid and benzoyl. Based on these fragments, the derivatization strategies of natural phenols were unified and comprehensively analyzed in this review. In addition to classical methods, advanced strategies with high selectivity, efficiency and practicality were emphasized. Total synthesis strategies of typical fragments such as stilbenes, chalcones and flavonoids were also covered and analyzed as the supplementary for supporting the diversity-oriented derivatization of natural phenols.
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Affiliation(s)
- Ding Lin
- State Key Laboratory of Subtropical Silviculture, Zhejiang A & F University, Hangzhou, 311300, China.
- Zhejiang Provincial Key Laboratory of Resources Protection and Innovation of Traditional Chinese Medicine, Zhejiang A & F University, Hangzhou, 311300, China.
| | - Senze Jiang
- State Key Laboratory of Subtropical Silviculture, Zhejiang A & F University, Hangzhou, 311300, China
- Zhejiang Provincial Key Laboratory of Resources Protection and Innovation of Traditional Chinese Medicine, Zhejiang A & F University, Hangzhou, 311300, China
| | - Ailian Zhang
- State Key Laboratory of Subtropical Silviculture, Zhejiang A & F University, Hangzhou, 311300, China
- Zhejiang Provincial Key Laboratory of Resources Protection and Innovation of Traditional Chinese Medicine, Zhejiang A & F University, Hangzhou, 311300, China
| | - Tong Wu
- State Key Laboratory of Subtropical Silviculture, Zhejiang A & F University, Hangzhou, 311300, China
- Zhejiang Provincial Key Laboratory of Resources Protection and Innovation of Traditional Chinese Medicine, Zhejiang A & F University, Hangzhou, 311300, China
| | - Yongchang Qian
- State Key Laboratory of Subtropical Silviculture, Zhejiang A & F University, Hangzhou, 311300, China
- Zhejiang Provincial Key Laboratory of Resources Protection and Innovation of Traditional Chinese Medicine, Zhejiang A & F University, Hangzhou, 311300, China
| | - Qingsong Shao
- State Key Laboratory of Subtropical Silviculture, Zhejiang A & F University, Hangzhou, 311300, China.
- Zhejiang Provincial Key Laboratory of Resources Protection and Innovation of Traditional Chinese Medicine, Zhejiang A & F University, Hangzhou, 311300, China.
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3
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Quintard A. Iron‐Based Multi‐Catalysis: Eco‐Compatible Alternative for Complex Molecules Synthesis. Chemistry 2020; 27:89-105. [DOI: 10.1002/chem.202002092] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Indexed: 01/07/2023]
Affiliation(s)
- Adrien Quintard
- CNRS Centrale Marseille iSm2 Aix Marseille Univ Marseille France
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4
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He X, Wang H, Cai X, Li Q, Tao J, Shang Y. FeCl 3-promoted tandem 1,4-conjugate addition/6-endo-dig cyclization/oxidation of propargylamines and benzoylacetonitriles/malononitriles: direct access to functionalized 2-aryl-4H-chromenes. Org Biomol Chem 2019; 16:7191-7202. [PMID: 30255179 DOI: 10.1039/c8ob01927d] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
An efficient and concise procedure has been developed for the synthesis of functionalized 2-aryl-4H-chromenes based on a tandem reaction of propargylamines and benzoylacetonitriles/malononitriles in the presence of FeCl3 as an environmentally friendly promoter. This reaction involves a highly efficient tandem sequence consisting of 1,4-conjugate addition, 6-endo-dig cyclization, and oxidation. This protocol tolerates a variety of functional groups, thereby providing a practical and efficient method for the fabrication of 2-aryl-4H-chromene skeletons.
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Affiliation(s)
- Xinwei He
- Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base), College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, P.R. China.
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5
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Yan LQ, Cai X, He X, Wang H, Xie M, Zuo Y, Shang Y. Synthesis of 4-styrylcoumarins via FeCl3-promoted cascade reactions of propargylamines with β-keto esters. Org Biomol Chem 2019; 17:4005-4013. [DOI: 10.1039/c9ob00323a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
A versatile and highly regioselective FeCl3-promoted tandem cyclization reaction of in situ generated alkynyl o-quinone methides (o-AQMs) with β-keto esters has been developed.
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Affiliation(s)
- Li-Qin Yan
- Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base)
- College of Chemistry and Materials Science
- Anhui Normal University
| | - Xiaoting Cai
- Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base)
- College of Chemistry and Materials Science
- Anhui Normal University
| | - Xinwei He
- Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base)
- College of Chemistry and Materials Science
- Anhui Normal University
| | - Hui Wang
- Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base)
- College of Chemistry and Materials Science
- Anhui Normal University
| | - Mengqing Xie
- Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base)
- College of Chemistry and Materials Science
- Anhui Normal University
| | - Youpeng Zuo
- Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base)
- College of Chemistry and Materials Science
- Anhui Normal University
| | - Yongjia Shang
- Key Laboratory of Functional Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base)
- College of Chemistry and Materials Science
- Anhui Normal University
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6
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Mkrtchyan S, Iaroshenko VO. New Entries to 3-Acylchromones: TM-Catalysed Decarboxylative Cross-Coupling of α-Keto Acids with ortho
-Hydroxyarylenaminones, 2,3-Unsubstituted Chromones and 3-Iodochromones. European J Org Chem 2018. [DOI: 10.1002/ejoc.201801231] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Satenik Mkrtchyan
- Laboratory of Homogeneous Catalysis and Molecular Design at the Centre of Molecular and Macromolecular Studies; Polish Academy of Sciences; Sienkiewicza 112, PL -90-363 Łodź Poland
| | - Viktor O. Iaroshenko
- Laboratory of Homogeneous Catalysis and Molecular Design at the Centre of Molecular and Macromolecular Studies; Polish Academy of Sciences; Sienkiewicza 112, PL -90-363 Łodź Poland
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7
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Song XR, Li R, Yang T, Chen X, Ding H, Xiao Q, Liang YM. Novel and Efficient Access to Flavones under Mild Conditions: Aqueous HI-Mediated Cascade Cyclization/Oxidative Radical Reaction of 2-Propynolphenols. European J Org Chem 2018. [DOI: 10.1002/ejoc.201801154] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Xian-Rong Song
- Institute of Organic Chemistry; Jiangxi Science & Technology Normal University; Nanchang Jiangxi Province China
| | - Ren Li
- Institute of Organic Chemistry; Jiangxi Science & Technology Normal University; Nanchang Jiangxi Province China
| | - Tao Yang
- Institute of Organic Chemistry; Jiangxi Science & Technology Normal University; Nanchang Jiangxi Province China
| | - Xi Chen
- Institute of Organic Chemistry; Jiangxi Science & Technology Normal University; Nanchang Jiangxi Province China
| | - Haixin Ding
- Institute of Organic Chemistry; Jiangxi Science & Technology Normal University; Nanchang Jiangxi Province China
| | - Qiang Xiao
- Institute of Organic Chemistry; Jiangxi Science & Technology Normal University; Nanchang Jiangxi Province China
| | - Yong-Min Liang
- State Key Laboratory of Applied Organic Chemistry; Lanzhou University; 730000 Lanzhou China
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8
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9
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Murali K, Sparkes HA, Prasad KJR. A Novel Synthesis of Aryl- and Heteroaryl - Annulated Carbazoles: Newly Synthesized Pyrido-, Benzo[a]- and Spirooxindolinebenzo[a]-carbazols. ChemistrySelect 2017. [DOI: 10.1002/slct.201700841] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Karunanidhi Murali
- Department of Chemistry; Bharathiar University; Coimbatore - 641046 India
| | - Hazel A. Sparkes
- School of Chemistry; University of Bristol; Cantock's Close Bristol BS8 1TS United Kingdom
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10
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Synthesis, Biological Evaluation and Molecular Modelling of 2'-Hydroxychalcones as Acetylcholinesterase Inhibitors. Molecules 2016; 21:molecules21070955. [PMID: 27455222 PMCID: PMC6273369 DOI: 10.3390/molecules21070955] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2016] [Revised: 07/15/2016] [Accepted: 07/16/2016] [Indexed: 11/25/2022] Open
Abstract
A series of 2′-hydroxy- and 2′-hydroxy-4′,6′-dimethoxychalcones was synthesised and evaluated as inhibitors of human acetylcholinesterase (AChE). The majority of the compounds were found to show some activity, with the most active compounds having IC50 values of 40–85 µM. Higher activities were generally observed for compounds with methoxy substituents in the A ring and halogen substituents in the B ring. Kinetic studies on the most active compounds showed that they act as mixed-type inhibitors, in agreement with the results of molecular modelling studies, which suggested that they interact with residues in the peripheral anionic site and the gorge region of AChE.
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11
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Lahyani A, Trabelsi M. Ultrasonic-assisted synthesis of flavones by oxidative cyclization of 2'-hydroxychalcones using iodine monochloride. ULTRASONICS SONOCHEMISTRY 2016; 31:626-630. [PMID: 26964989 DOI: 10.1016/j.ultsonch.2016.02.018] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2016] [Revised: 02/10/2016] [Accepted: 02/10/2016] [Indexed: 06/05/2023]
Abstract
This paper presents an efficient methodology for the synthesis of flavones via the oxidative cyclization of 2'-hydroxychalcones in the presence of iodine monochloride with DMSO under ultrasound irradiation. Ultrasonic irradiation enhances the cyclization reaction and leads to reduced reaction time at lower reaction temperatures while generating flavones with high yields.
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Affiliation(s)
- Achraf Lahyani
- Laboratory of Natural Substances, Faculty of Sciences, University of Sfax, Route de Soukra km 3.5, 3038 Sfax, Tunisia
| | - Mahmoud Trabelsi
- Laboratory of Natural Substances, Faculty of Sciences, University of Sfax, Route de Soukra km 3.5, 3038 Sfax, Tunisia.
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12
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Banerjee D, Kayal U, Maiti G. An efficient oxidative conversion of 2-aryl-2H-chromenes to the corresponding flavones by tert-butylhydroperoxide and copper bromide. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.03.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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13
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Lee J, Yu J, Son SH, Heo J, Kim T, An JY, Inn KS, Kim NJ. A versatile approach to flavones via a one-pot Pd(ii)-catalyzed dehydrogenation/oxidative boron-Heck coupling sequence of chromanones. Org Biomol Chem 2016; 14:777-784. [DOI: 10.1039/c5ob01911g] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A variety of flavones were expediently synthesized from readily accessible chromanones via a one-pot sequence involving Pd(ii)-catalyzed dehydrogenation and oxidative boron-Heck coupling with arylboronic acid pinacol esters.
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Affiliation(s)
- Jun Lee
- College of Pharmacy
- Kyung Hee University
- Seoul
- Republic of Korea
| | - Jihyun Yu
- College of Pharmacy
- Kyung Hee University
- Seoul
- Republic of Korea
| | - Seung Hwan Son
- College of Pharmacy
- Kyung Hee University
- Seoul
- Republic of Korea
| | - Jinyuk Heo
- College of Pharmacy
- Kyung Hee University
- Seoul
- Republic of Korea
| | - Taelim Kim
- Department of Life and Nanopharmaceutical Science
- Kyung Hee University
- Seoul
- Republic of Korea
| | - Ji-Young An
- College of Pharmacy
- Kyung Hee University
- Seoul
- Republic of Korea
| | - Kyung-Soo Inn
- College of Pharmacy
- Kyung Hee University
- Seoul
- Republic of Korea
| | - Nam-Jung Kim
- College of Pharmacy
- Kyung Hee University
- Seoul
- Republic of Korea
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14
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Yatabe T, Jin X, Yamaguchi K, Mizuno N. Gold Nanoparticles Supported on a Layered Double Hydroxide as Efficient Catalysts for the One‐Pot Synthesis of Flavones. Angew Chem Int Ed Engl 2015; 54:13302-6. [DOI: 10.1002/anie.201507134] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Revised: 08/21/2015] [Indexed: 01/01/2023]
Affiliation(s)
- Takafumi Yatabe
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7‐3‐1 Hongo, Bunkyo‐ku, Tokyo 113‐8656 (Japan)
| | - Xiongjie Jin
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7‐3‐1 Hongo, Bunkyo‐ku, Tokyo 113‐8656 (Japan)
| | - Kazuya Yamaguchi
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7‐3‐1 Hongo, Bunkyo‐ku, Tokyo 113‐8656 (Japan)
| | - Noritaka Mizuno
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7‐3‐1 Hongo, Bunkyo‐ku, Tokyo 113‐8656 (Japan)
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15
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Yatabe T, Jin X, Yamaguchi K, Mizuno N. Gold Nanoparticles Supported on a Layered Double Hydroxide as Efficient Catalysts for the One‐Pot Synthesis of Flavones. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201507134] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Takafumi Yatabe
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7‐3‐1 Hongo, Bunkyo‐ku, Tokyo 113‐8656 (Japan)
| | - Xiongjie Jin
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7‐3‐1 Hongo, Bunkyo‐ku, Tokyo 113‐8656 (Japan)
| | - Kazuya Yamaguchi
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7‐3‐1 Hongo, Bunkyo‐ku, Tokyo 113‐8656 (Japan)
| | - Noritaka Mizuno
- Department of Applied Chemistry, School of Engineering, The University of Tokyo, 7‐3‐1 Hongo, Bunkyo‐ku, Tokyo 113‐8656 (Japan)
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16
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Affiliation(s)
- Ingmar Bauer
- Department Chemie, Technische Universität Dresden, Bergstraße 66, 01069 Dresden, Germany
| | - Hans-Joachim Knölker
- Department Chemie, Technische Universität Dresden, Bergstraße 66, 01069 Dresden, Germany
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17
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Liu J, Song W, Yue Y, Liu R, Yi H, Zhuo K, Lei A. Pd(OAc)2/SPPh3 accelerated activation of gem-dichloroalkenes for the construction of 3-arylchromones. Chem Commun (Camb) 2015; 51:17576-9. [DOI: 10.1039/c5cc06334e] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The Pd-catalyzed regioselective intramolecular nucleophilic substitution of gem-dichloroalkene derivatives with salicylaldehydes leading to the synthesis of 3-arylchromones has been developed.
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Affiliation(s)
- Jianming Liu
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Henan Normal University
| | - Weiwei Song
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Henan Normal University
| | - Yuanyuan Yue
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Henan Normal University
| | - Ren Liu
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Henan Normal University
| | - Hong Yi
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan
- P. R. China
| | - Kelei Zhuo
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals
- Key Laboratory of Green Chemical Media and Reactions
- Ministry of Education
- School of Chemistry and Chemical Engineering
- Henan Normal University
| | - Aiwen Lei
- College of Chemistry and Molecular Sciences
- Wuhan University
- Wuhan
- P. R. China
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18
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Kayal U, Karmakar R, Banerjee D, Maiti G. Copper oxide catalyzed domino process for the synthesis of substituted 2H-pyran-2-ones and polyhydroxy coumarin derivatives. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.07.032] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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19
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20
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Naik MM, Tilve SG, Kamat VP. Pyrrolidine and iodine catalyzed domino aldol-Michael-dehydrogenative synthesis of flavones. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.04.051] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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21
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Karmakar R, Kayal U, Bhattacharya B, Maiti G. One-pot three-component reaction for the synthesis of biologically important spiro[benzo[f]quinoline-3,3′-indoline] derivatives. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.01.028] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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22
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Maiti G, Karmakar R, Kayal U. One pot imino Diels–Alder reaction for the synthesis of 3-aryl-3,4-dihydrobenzo[f]quinoline derivatives catalyzed by antimony trichloride. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.03.093] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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23
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An unexpected rearrangement-hydration reaction sequence of 2H-chromenes to dihydrochalcones under catalysis of HAuCl4. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.08.117] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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24
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Maiti G, Karmakar R, Kayal U, Bhattacharya RN. An efficient route to coumarin derivatives under dual catalysis, an organo- and a Lewis acid catalyst. Tetrahedron 2012. [DOI: 10.1016/j.tet.2012.07.092] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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25
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Palladium-catalyzed oxidative arylation of chromones via a double C–H activation: an expedient approach to flavones. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.03.100] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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26
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Shang JY, Li F, Bai XF, Jiang JX, Yang KF, Lai GQ, Xu LW. Malononitrile-Assisted Highly Chemoselective Bismuth Triflate Catalyzed Conjugate Reduction of α,β-Unsaturated Ketones. European J Org Chem 2012. [DOI: 10.1002/ejoc.201200020] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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27
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Maiti G, Kayal U, Karmakar R, Bhattacharya RN. Terminal alkynes as keto-methyl equivalent toward one pot synthesis of 1,5-benzodiazepine derivatives under catalysis of Hg(OTf)2. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.01.036] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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28
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A new synthesis of flavones and pyranoflavone by intramolecular photochemical Wittig reaction in water. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2011.10.134] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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