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Development and evaluation of Fusarium wilt-resistant and high-yielding chickpea advanced breeding line, KCD 11. THE PLANT GENOME 2024:e20460. [PMID: 38773690 DOI: 10.1002/tpg2.20460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2024] [Accepted: 04/10/2024] [Indexed: 05/24/2024]
Abstract
Fusarium wilt (FW) is the most severe soil-borne disease of chickpea that causes yield losses up to 100%. To improve FW resistance in JG 11, a high-yielding variety that became susceptible to FW, we used WR 315 as the donor parent and followed the pedigree breeding method. Based on disease resistance and yield performance, four lines were evaluated in station trials during 2017-2018 and 2018-2019 at Kalaburagi, India. Further, two lines, namely, Kalaburagi chickpea desi 5 (KCD 5) and KCD 11, which possesses the resistance allele for a specific single-nucleotide polymorphism marker linked with FW resistance, were evaluated across six different locations (Bidar, Kalaburagi, Raichur, Siruguppa, Bhimarayanagudi and Hagari) over a span of 3 years (2020-2021, 2021-2022 and 2022-2023). KCD 11 exhibited notable performance, showcasing yield advantages of 8.67%, 11.26% and 23.88% over JG 11, and the regional checks Super Annigeri 1 (SA 1) and Annigeri 1, respectively, with enhanced FW resistance in wilt sick plot. Further, KCD 11 outperformed JG 11, SA 1 and Annigeri 1 in multi-location trials conducted across three seasons in the North Eastern Transition Zone, North Eastern Dry Zone, and North Dry Zones of Karnataka. KCD 11 was also tested in trials conducted by All India Coordinated Research Project on chickpea and was also nominated for state varietal trials for its release as a FW-resistant and high-yielding variety. The selected line is anticipated to cater the needs of chickpea growers with the dual advantage of yield increment and disease resistance.
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Advance on the biology, behaviour ecology and management of the coffee white stem borer, Xylotrechus quadripes Chevrolat, 1863 (Coleoptera: Cerambycidae). Heliyon 2023; 9:e19506. [PMID: 37809674 PMCID: PMC10558757 DOI: 10.1016/j.heliyon.2023.e19506] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Revised: 08/22/2023] [Accepted: 08/24/2023] [Indexed: 10/10/2023] Open
Abstract
The coffee white stem borer, Xylotrechus quadripes Chevrolat, 1863 (Coleoptera: Cerambycidae) - here removed from the synonymy with X. javanicus (Laporte & Gory, 1841) - is the most notorious pest in Arabica coffee plantations in many southeast Asian countries. It can cause damage up to 80% in various gardens. The borer is reported on 16 different host plants other than coffee. The severity of the pest was more commonly recorded on the Arabica coffee than on other species. More pest intensity on the coffee may be due to its innate evolutionary relation compared to other host plants. Studies revealed that the borer is more specific and attracted to the volatile of coffee plants but it is still needs a strong supporting data. Some of the behavioural and ecological-adaptations of borers leads to avoid predation and chemical-pesticides reaching them. Hence, no single method gives perfect control of this pest; therefore, harmonic use of different tools such as cultural, mechanical, physical, bio-control and chemical methods are the best way to combat this pest. Though the pest is economically important, the information on chemical and ecological behaviour, host plant resistance and recent advancements in the pest management are scanty. The present article is an endeavour to shed a light on biology, behaviour, host selection and management of X. quadripes with multiple instances, that will give a new avenue for the researchers to work on the least concerned fields to develop strong management practice and alert against future pest outbreak.
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Three-step process for the synthesis of favipiravir. RESULTS IN CHEMISTRY 2023. [DOI: 10.1016/j.rechem.2023.100895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/13/2023] Open
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4
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Stereoselective total syntheses of dodoneine and its diastereomer, epidodoneine via Prins cyclisation. Tetrahedron 2023. [DOI: 10.1016/j.tet.2022.133242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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5
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First Diastereoselective Total Synthesis of Bicyclic Styryl Lactone: (1R,5R,7R)-7-((E)-styryl)-2,6-dioxabicyclo[3.3.1]nonan-3-one. RESULTS IN CHEMISTRY 2022. [DOI: 10.1016/j.rechem.2022.100717] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
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6
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Cu(II)-catalyzed synthesis of 2,4,5-trisubstituted oxazoles. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.154252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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7
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Cooperative catalytic Prins cyclization for the construction of azaspiro[5.5]undec-2-ene frameworks. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.154174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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8
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Tandem Prins bicyclization for the synthesis of tetrahydropyran containing spirocompounds. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.154162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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9
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Design, synthesis, in vitro α-glucosidase inhibitory, antioxidant activity and molecular docking studies of novel pyridine linked imidazo[1,2-a]pyridine derivatives. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.134238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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10
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Design and metal-free synthesis and cytotoxicity evaluation of 5H-chromeno[4,3-b]pyridine derivatives as anti-proliferative agents. LETT ORG CHEM 2022. [DOI: 10.2174/1570178619666220415231814] [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
Background:
A novel metal-free approach is reported for the synthesis of 5H-chromeno[4,3-b]pyridine derivatives. Indeed, chromene derivatives are found to exhibit a broad spectrum of biological activities such as antibacterial, antirhinovirus, antioxidant, cytotoxic, anticancer, and antimicrobial properties.
Methods:
This method provides an easy access to a large number of 5H-chromeno[4,3-b]pyridine scaffolds by the condensation of 3-formylchromene with -enaminoesters under thermal conditions. All compounds are well characterized by NMR, IR and mass spectrometry. This is a safe and convenient protocol.
Results:
Thus newly synthesized compounds are evaluated for their cytotoxicity against four human cancer cell lines, such as B16 (Skin cancer), DU145 (Prostate cancer), Hela (Cervical cancer) and CHO (Chinese hamster ovary).
Conclusion:
Among them, compounds 3n and 3o shows an excellent anti-proliferation activity against CHO (IC50 12.33+1.13 μM), Hela (IC50 22.33+0.51 μM), and B16 (IC50 27.61+0.8 μM) cell lines, while compounds 3c, 3g and 3q exhibits promising anti-proliferation against above four human cancer cell lines with IC50 14.96+1.9, 15.59+0.9, 13.8+0.06 μM, respectively, compared with a standard drug Doxorubicin & Mitomycin.
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Benzyl chlorides as aldehyde surrogates in the Prins cyclization: Direct access to 2-aryl-4-chlorotetrahydropyrans. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.153746] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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12
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Knowledge extraction of sonophotocatalytic treatment for acid blue 113 dye removal by artificial neural networks. ENVIRONMENTAL RESEARCH 2022; 204:112359. [PMID: 34774834 DOI: 10.1016/j.envres.2021.112359] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Revised: 11/04/2021] [Accepted: 11/06/2021] [Indexed: 06/13/2023]
Abstract
Removing decolorizing acid blue 113 (AB113) dye from textile wastewater is challenging due to its high stability and resistance to removal. In this study, we used an artificial neural network (ANN) model to estimate the effect of five different variables on AB113 dye removal in the sonophotocatalytic process. The five variables considered were reaction time (5-25 min), pH (3-11), ZnO dosage (0.2-1.0 g/L), ultrasonic power (100-300 W/L), and persulphate dosage (0.2-3 mmol/L). The most effective model had a 5-7-1 architecture, with an average deviation of 0.44 and R2 of 0.99. A sensitivity analysis was used to analyze the impact of different process variables on removal efficiency and to identify the most effective variable settings for maximum dye removal. Then, an imaginary sonophotocatalytic system was created to measure the quantitative impact of other process parameters on AB113 dye removal. The optimum process parameters for maximum AB 113 removal were identified as 6.2 pH, 25 min reaction time, 300 W/L ultrasonic power, 1.0 g/L ZnO dosage, and 2.54 mmol/L persulfate dosage. The model created was able to identify trends in dye removal and can contribute to future experiments.
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Modeling and optimization of process parameters of biofilm reactor for wastewater treatment. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 787:147624. [PMID: 34000535 DOI: 10.1016/j.scitotenv.2021.147624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2021] [Revised: 04/19/2021] [Accepted: 05/03/2021] [Indexed: 06/12/2023]
Abstract
The efficiency of heavy metal in biofilm reactors depends on absorption process parameters, and those relationships are complicated. This study explores artificial neural networks (ANNs) feasibility to correlate the biofilm reactor process parameters with absorption efficiency. The heavy metal removal and turbidity were modeled as a function of five process parameters, namely pH, temperature(°C), feed flux(ml/min), substrate flow(ml/min), and hydraulic retention time(h). We developed a standalone ANN software for predicting and analyzing the absorption process in handling industrial wastewater. The model was tested extensively to confirm that the predictions are reasonable in the context of the absorption kinetics principles. The model predictions showed that the temperature and pH values are the most influential parameters affecting absorption efficiency and turbidity.
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Erratum to “Ru(II) catalyzed dehydrogenative annulation of 2-arylimidazo[1,2-a]pyridines with maleimides” [Tetrahedron Lett., Volume 66, 2 March 2021, 152830]. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.152982] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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15
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Prediction of batch sorption of barium and strontium from saline water. ENVIRONMENTAL RESEARCH 2021; 197:111107. [PMID: 33812876 DOI: 10.1016/j.envres.2021.111107] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Revised: 03/24/2021] [Accepted: 03/25/2021] [Indexed: 06/12/2023]
Abstract
Celestite and barite formation results in contamination of barium and strontium ions hinder oilfield water purification. Conversion of bio-waste sorbent products deals with a viable, sustainable and clean remediation approach for removing contaminants. Biochar sorbent produced from rice straw was used to remove barium and strontium ions of saline water from petroleum industries. The removal efficiency depends on biochar amount, pH, contact time, temperature, and Ba/Sr concentration ratio. The interactions and effects of these parameters with removal efficiency are multifaceted and nonlinear. We used an artificial neural network (ANN) model to explore the correlation between process variables and sorption responses. The ANN model is more accurate than that of existing kinetic and isotherm equations in assessing barium and strontium removal with adj. R2 values of 0.994 and 0.991, respectively. We developed a standalone user interface to estimate the barium and strontium removal as a function of sorption process parameters. Sensitivity analysis and quantitative estimation were carried out to study individual process variables' impact on removal efficiency.
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Abstract
This review summarizes the transition metal-catalyzed direct C–H functionalization
of quinazolinones and quinazolines through C-C, C-N and C-O bond formations. It focuses
mainly on the C-H (sp<sup>2</sup> or sp<sup>3</sup>) bond arylation, amination, sulfamidation, acetoxylation,
halogenation, annulation of quinazolinones and quinazolines. This review illustrates the scope
of C-H activation and functionalization of various quinazolinone and quinazoline derivatives.
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17
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Ru(II) catalyzed dehydrogenative annulation of 2-arylimidazo[1,2-a]pyridines with maleimides. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.152830] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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18
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TosMIC and its derivatives as versatile sulfonylating agents for the synthesis of p-toluenesulfonylarenes from aryl halides and arylboronic acids. Tetrahedron 2020. [DOI: 10.1016/j.tet.2020.131674] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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19
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20
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BINOL-phosphoric acid catalyzed asymmetric Mannich addition of β-ketoesters to indolenines generated in situ by DDQ. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.130620] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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21
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22
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Design, Synthesis, Molecular Docking and Biological Evaluation of 1-(benzo[d]thiazol-2-ylamino)(phenyl)methyl)naphthalen-2-ol Derivatives as Antiproliferative Agents. LETT ORG CHEM 2019. [DOI: 10.2174/1570178616666190408101233] [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
A class of 1-((benzo[d]thiazol-2-ylamino)(phenyl)methyl)naphthalen-2-ol derivatives (4a-t) has been synthesized in good yields through a three component coupling reaction. The newly synthesized compounds were evaluated for their in vitro antiproliferative activity against five cell lines such as DU145 (human prostate cancer), MDA-MB-B231 (human breast cancer), SKOV3 (human ovarian cancer), B16-F10 (mouse skin melanoma) and CHO-K1 (Chinese hamster ovary cells), a noncancerous cell line. In vitro inhibitory activity indicates that compounds 4a, 4b, 4c, 4d, 4g, 4j, and 4o exhibited potent anti-proliferative behavior. Among them, compounds 4g, 4j and 4o found to be the most active members exhibiting remarkable growth inhibitory activity. Molecular docking facilitates to investigate the probable binding mode and key active site interactions in tubulins α and β proteins. The docking results are complementary to experimental results.
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23
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Microwave-Assisted Efficient synthesis of Dihydro Pyrimidines: Improved High Yielding Protocol for the Biginelli Reaction. JOURNAL OF CHEMICAL RESEARCH 2019. [DOI: 10.3184/030823400103167633] [Citation(s) in RCA: 75] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Dihydropyrimidines were synthesised in high yields by one-pot cyclocondensation reaction of aldehydes, aceto-acetates and urea using various acid catalysts like Amberlyst-15, Nafion-H, KSF clay and dry acetic acid under microwave irradiation.
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24
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Microwave-assisted efficient one-pot synthesis of nitriles in dry media. JOURNAL OF CHEMICAL RESEARCH 2019. [DOI: 10.3184/030823401103169595] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A rapid and efficient procedure is reported for the synthesis of nitriles by condensation of aldehydes with hydroxylamine hydrochloride in the presence of dibutyltin oxide supported on Al2O3 under microwave irradiation
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25
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An Efficient and Selective conversion of Hydrazides into Esters and Acids. JOURNAL OF CHEMICAL RESEARCH 2019. [DOI: 10.3184/030823400103167958] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Hydrazides are selectively oxidised to esters/acids in high yields using Oxone® in the presence of an appropriate alcohol/water as a nucleophile at ambient temperature. A variety of functional groups including alkenes, alcohols, ethers, cyclopropyl groups and nitriles are unaffected.
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26
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Efficient and selective protection of aldehydes as geminal diacetates using LiBr. JOURNAL OF CHEMICAL RESEARCH 2019. [DOI: 10.3184/030823400103166472] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A variety of aldehydes react with acetic anhydride in presence of lithium bromide at room temperature to afford the corresponding 1,1-diacetates in quantitative yields within a few hours of reaction time.
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27
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Preparation of (1R,4S)-4-hydroxycyclopent-2-en-1-yl acetate via Novozym-435® catalyzed desymmetrization of cis-3,5-Diacetoxy-1-cyclopentene. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.09.052] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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28
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Pd(II)/PhI(OAc)2 promoted direct cross coupling of glucals with aromatic acids. Carbohydr Res 2018; 461:1-3. [DOI: 10.1016/j.carres.2018.03.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Revised: 03/04/2018] [Accepted: 03/04/2018] [Indexed: 01/17/2023]
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29
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30
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Synthesis and biological evaluation of 1-amino isochromans from 2-bromoethyl benzaldehyde and amines in acid medium. Bioorg Med Chem Lett 2018; 28:196-201. [DOI: 10.1016/j.bmcl.2017.11.020] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Revised: 10/13/2017] [Accepted: 11/09/2017] [Indexed: 01/17/2023]
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31
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32
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A New Entry into Chromenone Derivatives by a Domino Knoevenagel Intramolecular Hetero-Diels-Alder Reaction. LETT ORG CHEM 2017. [DOI: 10.2174/1570178614666170310123959] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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33
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An intramolecular cycloaddition of nitrones with tethered olefins: a versatile synthesis of hexahydro-3 H -xantheno[1,2- c ]isoxazoles. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.05.055] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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34
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Tandem vinylcyclopropane ring opening/Prins cyclization for the synthesis of 2,3-disubstituted tetrahydropyrans. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.03.062] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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35
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Rh2(OAc)4 catalyzed highly diastereoselective synthesis of 2,4,5-triaryl-1,3-oxazolidines and spirooxindolyl oxazolidines. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.02.055] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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36
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Synthesis and biological evaluation of phaitanthrin congeners as anti-mycobacterial agents. Bioorg Med Chem Lett 2015; 25:3867-72. [DOI: 10.1016/j.bmcl.2015.07.057] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2015] [Revised: 07/13/2015] [Accepted: 07/18/2015] [Indexed: 10/23/2022]
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37
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Role of Endogenous Peptides and Enzymes in the Pathogenesis of Acute Pancreatitis: A Review. TROP J PHARM RES 2015. [DOI: 10.4314/tjpr.v14i7.26] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
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38
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Sequential glycosylation/endo-dig cyclization of sugar enynones for the synthesis of pyrano[3,2-c]furan scaffolds. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.02.089] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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39
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Bioglycerol-derived carbon−SO3H as a recyclable catalyst for the synthesis of tetrahydro-β-carbolines. CAN J CHEM 2015. [DOI: 10.1139/cjc-2014-0350] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
A variety of aldehydes undergo smooth coupling with N-tosyltryptamine in the presence of carbon−SO3H in ethanol at 80 °C to furnish the corresponding tetrahydro-β-carbolines in excellent yields with high selectivity. The coupling of tryptamine with isatins affords the respective spiro-tetrahydro-β-carbolines in good yields. The use of a recyclable solid acid catalyst makes this method simple, convenient, and cost-effective.
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40
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Au(I)/Ag(I)-catalyzed annulation of sugar aldehyde tethered with 3-phenylprop-2-yn-1-yl ether with aryl amines for the pyrano[4,3-b]quinoline derivatives. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.09.037] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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41
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42
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43
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Thee-component, one-pot synthesis of hexahydroazepino[3,4- b ]indole and tetrahydro-1 H -pyrido[3,4- b ]indole derivatives and evaluation of their cytotoxicity. Bioorg Med Chem Lett 2014; 24:4501-4503. [DOI: 10.1016/j.bmcl.2014.07.084] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2014] [Revised: 07/24/2014] [Accepted: 07/30/2014] [Indexed: 10/24/2022]
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44
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Aminol initiated Prins cyclization for the synthesis of octahydro-1H-pyrano [3,4-c]pyridine and hexahydro-1H-furo[3,4-c]pyrrole derivatives. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.06.109] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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46
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Stereoselective synthesis of tetrahydropyran–tetrahydrofuran (THP–THF) core of (+)-muconin via Prins cyclization. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.02.096] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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47
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BF3·OEt2-catalyzed synthesis of 1-(tetrahydropyran-3-yl)-1,3-dihydroisobenzofuran and trans-fused hexahydropyrano[3,2-c]chromene derivatives. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.05.083] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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48
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49
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B(C6F5)3-catalyzed Prins/Ritter reaction: a novel synthesis of hexahydro-1H-furo[3,4-c]pyranyl amide derivatives. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.05.115] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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50
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