1
|
Pednekar S, Sivanandan ST, Kumar D, Bharath Krishna R, Namboothiri INN. Catalyst- and Base-Free Synthesis of Morita-Baylis-Hillman and Rauhut-Currier Adducts of β-Aminonitroalkenes. J Org Chem 2023; 88:4799-4808. [PMID: 36971694 DOI: 10.1021/acs.joc.2c02969] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
Abstract
A facile, base- and catalyst-free synthesis of Morita-Baylis-Hillman and Rauhut-Currier adducts of β-aminonitroalkenes with different electrophiles such as ethyl glyoxylate, trifluoropyruvate, ninhydrin, vinyl sulfone, and N-tosylazadiene is reported. The products are formed in good to excellent yields at room temperature with a broad substrate scope. The adducts of ninhydrin and β-aminonitroalkene spontaneously cyclize to fused indenopyrroles. Gram-scale reactions and synthetic transformations of the adducts are also reported here.
Collapse
Affiliation(s)
- Snehal Pednekar
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai 400 076, India
| | - Sudheesh T Sivanandan
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai 400 076, India
| | - Deepak Kumar
- Department of Chemistry, Indian Institute of Technology Bombay, Mumbai 400 076, India
| | | | | |
Collapse
|
2
|
Kshirsagar N, Sonawane R, Pathan S, Kamble G, Pal Singh G. A Review on Synthetic Approaches of Phenanthridine. LETT ORG CHEM 2022. [DOI: 10.2174/1570178618666210218211424] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Abstract:
The phenanthridine family is widely found in medicinal chemistry and material science because
of the biological activity and its presence in a variety of significant natural products and synthetic
dye stuffs. The phenanthridine has many clinical applications, for e.g., being used as an anticancer agent,
possessing antibacterial, antiprotozoal, pharmaceutical, and optoelectronic properties. Many methods
have been reported for the synthesis of phenanthridine and phenanthridine alkaloids, such as Pd catalyzed
C-C bond formation, a reaction involving C-H activation, radical, microwave-assisted, transition
metal-catalyzed, one-pot cascade, benzyne mediated, photochemical, hypervalent iodine promoted methods,
etc. Here, we have summarized the literature data from 2014 to the present concerning novel or
improved synthetic approaches.
Collapse
Affiliation(s)
| | | | - Sultan Pathan
- Department of Chemistry, Bhupal Nobles
University, Udaipur, Rajasthan, India
| | - Ganesh Kamble
- Department of Chemistry, Osaka University, ISIR 8-1 Mihogaoka, Ibaraki,
Osaka 567-0047, Japan
| | - Girdhar Pal Singh
- Department of Chemistry, Bhupal Nobles
University, Udaipur, Rajasthan, India
| |
Collapse
|
3
|
Kritchenkov IS, Mikhnevich VG, Stashchak VS, Solomatina AI, Kozina DO, Sokolov VV, Tunik SP. Novel NIR-Phosphorescent Ir(III) Complexes: Synthesis, Characterization and Their Exploration as Lifetime-Based O2 Sensors in Living Cells. Molecules 2022; 27:molecules27103156. [PMID: 35630633 PMCID: PMC9144934 DOI: 10.3390/molecules27103156] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Revised: 05/10/2022] [Accepted: 05/11/2022] [Indexed: 11/16/2022] Open
Abstract
A series of [Ir(N^C)2(N^N)]+ NIR-emitting orthometalated complexes (1–7) has been prepared and structurally characterized using elemental analysis, mass-spectrometry, and NMR spectroscopy. The complexes display intense phosphorescence with vibrationally structured emission bands exhibiting the maxima in the range 713–722 nm. The DFT and TD DFT calculations showed that the photophysical characteristics of these complexes are largely determined by the properties of the metalating N^C ligands, with their major contribution into formation of the lowest S1 and T1 excited states responsible for low energy absorption and emission, respectively. Emission lifetimes of 1–7 in degassed methanol solution vary from 1.76 to 5.39 µs and show strong quenching with molecular oxygen to provide an order of magnitude lifetime reduction in aerated solution. The photophysics of two complexes (1 and 7) were studied in model physiological media containing fetal bovine serum (FBS) and Dulbecco’s Modified Eagle Medium (DMEM) to give linear Stern-Volmer calibrations with substantially lower oxygen-quenching constants compared to those obtained in methanol solution. These observations were interpreted in terms of the sensors’ interaction with albumin, which is an abundant component of FBS and cell media. The studied complexes displayed acceptable cytotoxicity and preferential localization, either in mitochondria (1) or in lysosomes (7) of the CHO-K1 cell line. The results of the phosphorescence lifetime imaging (PLIM) experiments demonstrated considerable variations of the sensors’ lifetimes under normoxia and hypoxia conditions and indicated their applicability for semi-quantitative measurements of oxygen concentration in living cells. The complexes’ emission in the NIR domain and the excitation spectrum, extending down to ca. 600 nm, also showed that they are promising for use in in vivo studies.
Collapse
|
4
|
Shan L, Li H, Min L, Weng Y, Wang X, Hu Y. Bischler-Napieralski Synthesis of 6-Alkynyl Phenanthridines Based on Tf 2O-Promoted Electrophilic Activation of N-Aryl-2-propynamides. J Org Chem 2021; 86:15726-15732. [PMID: 34618460 DOI: 10.1021/acs.joc.1c01543] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
An efficient method for the synthesis of 6-alkynyl phenanthridines was developed. The method offered the first example to use 2-propynamides as substrates in the Bischler-Napieralski reaction and to create alkynylnitrilium triflates as new active intermediates in organic synthesis.
Collapse
Affiliation(s)
- Lidong Shan
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, P.R. China
| | - Hongchen Li
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, P.R. China
| | - Lin Min
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, P.R. China
| | - Yunxiang Weng
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, P.R. China
| | - Xinyan Wang
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, P.R. China
| | - Yuefei Hu
- Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Department of Chemistry, Tsinghua University, Beijing 100084, P.R. China
| |
Collapse
|
5
|
Na2S·9H2O mediated facile synthesis of 1,3-dihydrofuro[3,4-b]quinoline derivatives via domino reduction approach. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.132447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
6
|
Kumar VS, Gudise VB, Settipalli PC, Reddy EK, Firoj Basha S, Reddy YP, Srinivasadesikan V, Lee S, Anwar S. Understanding the Mechanism of S
N
2′
vs
. S
N
2 in Cascade Reaction of β‐Naphthol and Nitrostyrene Derived MBH Acetates. ChemistrySelect 2020. [DOI: 10.1002/slct.201904618] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Vadiga Shanthi Kumar
- Division of ChemistryDepartment of Sciences and HumanitiesVignan's Foundation for Science Technology and Research-VFSTR ( Deemed to be University) Vadlamudi Guntur-Andhra Pradesh 522 213 India
| | - Veera Babu Gudise
- Division of ChemistryDepartment of Sciences and HumanitiesVignan's Foundation for Science Technology and Research-VFSTR ( Deemed to be University) Vadlamudi Guntur-Andhra Pradesh 522 213 India
| | - Poorna Chandrasekhar Settipalli
- Division of ChemistryDepartment of Sciences and HumanitiesVignan's Foundation for Science Technology and Research-VFSTR ( Deemed to be University) Vadlamudi Guntur-Andhra Pradesh 522 213 India
| | - Eeda Koti Reddy
- Division of ChemistryDepartment of Sciences and HumanitiesVignan's Foundation for Science Technology and Research-VFSTR ( Deemed to be University) Vadlamudi Guntur-Andhra Pradesh 522 213 India
| | - Shaik Firoj Basha
- Division of ChemistryDepartment of Sciences and HumanitiesVignan's Foundation for Science Technology and Research-VFSTR ( Deemed to be University) Vadlamudi Guntur-Andhra Pradesh 522 213 India
| | - Yeruva Pavankumar Reddy
- Division of ChemistryDepartment of Sciences and HumanitiesVignan's Foundation for Science Technology and Research-VFSTR ( Deemed to be University) Vadlamudi Guntur-Andhra Pradesh 522 213 India
| | - V. Srinivasadesikan
- Division of ChemistryDepartment of Sciences and HumanitiesVignan's Foundation for Science Technology and Research-VFSTR ( Deemed to be University) Vadlamudi Guntur-Andhra Pradesh 522 213 India
| | - Shyi‐Long Lee
- Department of Chemistry and BiochemistryNational Chung Cheng University Chia-Yi 621 Taiwan
| | - Shaik Anwar
- Division of ChemistryDepartment of Sciences and HumanitiesVignan's Foundation for Science Technology and Research-VFSTR ( Deemed to be University) Vadlamudi Guntur-Andhra Pradesh 522 213 India
| |
Collapse
|
7
|
Xu D, Kaiser F, Li H, Reich RM, Guo H, Kühn FE. Highly selective AlCl 3 initiated intramolecular α-alkylation of α,β-unsaturated lactams and lactones. Org Biomol Chem 2018; 17:49-52. [PMID: 30525162 DOI: 10.1039/c8ob02961j] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
An unprecedented example of AlCl3 initiated intramolecular α-alkylation of α,β-unsaturated lactams and lactones is reported. A variety of substrates containing an intramolecular diene yield exclusively regioselective six-membered ring products. This reaction protocol generates a new stereo centre which may be of high interest for the functionalization of bioactive coumarin and quinolinone derivatives.
Collapse
Affiliation(s)
- Dawen Xu
- Molecular Catalysis, Catalysis Research Center and Department of Chemistry, Technische Universität München, Lichtenbergstr. 4, 85747 Garching bei München, Germany.
| | | | | | | | | | | |
Collapse
|
8
|
Mishra K, Bharadwaj KC, Singh RM. Catalytic trifluoromethylation of aldehyde and potential application for pyrano[4,3-b]quionline synthesis. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.08.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
9
|
Gupta T, Singh JB, Singh R, Singh RM. Palladium-Catalyzed Reaction of MBH Acetates and Terminal Alkynes: Cascade Synthesis of Phenanthridine and 6-Arylethynylphenanthridine. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800725] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Tanu Gupta
- Department of Chemistry; Centre of Advanced Study; Institute of Science; Banaras Hindu University; Varanasi India
- Department of Chemistry; Rajendra College; Jai Prakash University; -841301 Chapra Bihar India
| | - Jay Bahadur Singh
- Department of Chemistry; Centre of Advanced Study; Institute of Science; Banaras Hindu University; Varanasi India
| | - Rashmi Singh
- Department of Chemistry; Centre of Advanced Study; Institute of Science; Banaras Hindu University; Varanasi India
| | - Radhey M. Singh
- Department of Chemistry; Centre of Advanced Study; Institute of Science; Banaras Hindu University; Varanasi India
| |
Collapse
|