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Wyszukujesz frazę "Joshi, H." wg kryterium: Autor

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    Wyświetlanie 1-14 z 14
    Tytuł:
    Synthesis and antimicrobial screening of some new pyrimido[1,2-a]benzimidazole derivatives
    Autorzy:
    Shah, N. M.
    Joshi, H. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/411967.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    2-aminobenzimidazole
    pyrimido[1,2-a]benzimidazole
    chalcone
    antimicrobial activity azoloazine
    Opis:
    Some new pyrimido[1,2-a]benzimidazole derivatives were synthesized by reacting 2-amino benzimidazole and chalcones in n-butanol at reflux temperature. In our present study we have used various heterocyclic chalcones derived from furfural and substituted acetophenones. All synthesized compounds were characterized by IR, 1H NMR and Mass spectroscopy. All synthesized compounds were screened for their antimicrobial activity against gram positive and gram negative bacteria which showed moderate to good activity.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2014, 6; 56-60
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis and characterization of diversely substituted pyrimidine-3-carboxamide and their antimicrobial evaluation
    Autorzy:
    Senjani, Hardik K.
    Joshi, H. D.
    Powiązania:
    https://bibliotekanauki.pl/articles/1031771.pdf
    Data publikacji:
    2020
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    1-4-dihydropyrimidine
    analgesic
    anti-inflammatory
    antibacterial
    anticonvulsant
    antifungal
    antimicrobial
    antituberculosis
    antitumor
    biginalli
    dihydropyrimidine
    insecticidal
    multi-component reaction
    pyrimidine
    Opis:
    Pyrimidine related fused heterocycles are attracted to every chemist during the last decade for their biological and chemotherapeutic importance. Pyrimidine derivatives play a vital role in their broad spectrum of biological activities including antituberculosis, anticonvulsant, anti-inflammatory, insecticidal, antifungal, analgesic, and antitumor properties and there of interest as potential bioactive molecules. The nitrogen-containing fragment may be an amidine, urea, thiourea, or guanidine, and adamantine homologs and aromatic aldehyde serve as an excellent illustrative example in that it readily undergoes as Biginali MCRs reaction. Pyrimidines and their derivatives are considered to be important for drugs and agricultural chemicals. Pyrimidine derivatives possess several interesting biological activities. Pyrimidine is a basic nucleus in DNA & RNA, it is associated with diverse biological activities so, we have designed and prepared a novel highly functionalized pyrimidine library of 1,4 DHP and DHPM via a one-pot multi-component (MCRs) synthesis and we screened for antimicrobial activity against various strains.
    Źródło:
    World Scientific News; 2020, 150; 39-77
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An efficient protocol for the synthesis of novel 2-amino-N-(1-(aryl-2-oxo-2Hchromen-3-yl)ethylidene) benzohydrazides act as an antimicrobial agents
    Autorzy:
    Rola, R. R.
    Joshi, H. D.
    Powiązania:
    https://bibliotekanauki.pl/articles/1031432.pdf
    Data publikacji:
    2021
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    2-amino-N'-(1-(6-bromo-2-oxo-2H-chromen-3-yl)ethylidene)benzohydrazides
    antimicrobial evaluation
    efficient procedure
    Opis:
    We report here the protocol for the preparation of 2-amino-N'-(1-(aryl-2-oxo-2H-chromen-3-yl)ethylidene)benzohydrazides compounds in moderate to excellent yields (46–86%) within a short reaction time (10–15 min), through a clean and efficient procedure. Additionally, the method has a wide substrate scope and provides an accessible route for the large-scale direct synthesis of 2-amino-N'-(1-(aryl-2-oxo-2H-chromen-3-yl)ethylidene)benzohydrazides. The products were assayed for their in vitro biological assay antimicrobial evaluation against two Gram-negative bacteria Escherichia coli MTCC 442, Pseudomonas aeruginosa MTCC 441 and antifungal activity against Candida albicans MTCC 227, Aspergillus Niger MTCC 282, Aspergillus clavatus MTCC 1323 at different concentrations which compared with ampicillin, chloramphenicol, ciprofloxacin, norfloxacin, nystatin, and greseofulvin in as standard drugs which are presented.
    Źródło:
    World Scientific News; 2021, 152; 15-26
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Rapid, sensitive and accurate method for determination of Lafutidine hydrochloride in human plasma by RP-HPLC system
    Autorzy:
    Vekariya, P. P.
    Joshi, H. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/412425.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    HPLC-PDA
    Human plasma
    Solid phase Extraction
    Opis:
    Simple and rapid reverse phase high-performance liquid chromatography (RP-HPLC) method was developed and validated using Phenomenex Gemini c18 (4.6 x 250 mm, 5 μ) reverse phase column for the determination of LAF in human plasma, Solid Phase Extraction (SPE) technique was used for the extraction of analyte, detection was carried out by Photo Diode Array detector at 216 nm. Chromatographic resolution of the LAF was achieved within 4.6 min by using mobile phase Methanol and 5 mM Di-Potassium Hydrogen Phosphate Buffer (pH 9.5) (80:20, v/v), flow rate was 1.0 mL/min. Calibration curve was linear with correlation coefficient of 0.9996 in the range of 50-1000 ng/mL, Limit of Detection (LOD) and Limit of Quantitation (LOQ) were 10 ng/mL and 30 ng/mL respectively, intra and inter-day deviations were lower than 3.92 % and 3.98 % respectively. The overall mean recovery of LAF was 94.57 %. No any endogenous constituents were found to interfere at retention time of the analyte. This new RP-HPLC method was successfully validated and may be applied to conduct bioavailability & bioequivalence studies of LAF.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2014, 7; 9-20
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis and antimicrobial activity of some new imidazolinone derivatives containing benzimidazole
    Autorzy:
    Mehta, P.
    Davadra, P.
    Shah, N.
    Joshi, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/411949.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    benzimidazole
    imidazolinone
    antimicrobial activity
    Opis:
    In this study some new o-benzimidazol-2'-yl-benzamido-p'-benzamido-2-phenyl-4-substituted phenyl-5-oxo-Imidazolines 3a-3j were synthesized. To synthesized target molecules we used various substituted oxazolone derivatives, synthesized from substituted benzaldehyde with hippuric acid. Substituted oxazolones 2a-2j were reacted with carbohydrazide derivative of benzimidazole 1 in presence of pyridine as base to obtained substituted imidazolinone derivatives. All synthesized compounds were characterized by IR, 1H NMR, elemental analysis and further supported by mass spectroscopy. All synthesized compounds were screened for their antimicrobial activity against gram positive and gram negative bacteria which showed moderate to good activity. All compounds showing good to moderate active against fungal strain as compare to standard drug.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2014, 10; 74-80
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis and characterization of some thiazolidinone derivatives possessing benzimidazole nucleus
    Autorzy:
    Mehta, P.
    Dawedra, P.
    Goswami, V.
    Joshi, H. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/412250.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    4-Thiazolidinone
    Benzimidazole
    Schiff base
    Opis:
    Synthesis of new thiazolidinone derivatives possessing benzimidazole nucleus by condensation reaction of various substituted mercapto acids in presence of anhydrous ZnCl2. In our present study we have also synthesized Schiff bases of benzimidazole derivatives. All synthesized compounds were characterized by IR, 1H NMR and Mass spectroscopy.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2014, 11, 1; 1-8
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis, characterization and antimicrobial activity of 2-azetidinone derivatives of benzimidazoles
    Autorzy:
    Mehta, P.
    Davadra, P.
    Pandya, J. R.
    Joshi, H. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/412088.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    2-azitidinone
    benzimidazole
    antimicrobial activity
    Opis:
    Some new 2-azetidinone derivatives possessing benzimidazole nucleus were synthesized and characterized by IR, NMR and mass spectral analysis. All synthesized compounds were screened for antimicrobial activity using cup plate method. All the compounds showed moderate to good antimicrobial activity and anti fungal activity.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2014, 11, 2; 81-88
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis and biological activity of 1,2,4-triazolo-[3,4-b]thiadiazole as antimicrobial agents
    Autorzy:
    Vekariya, P. B.
    Pandya, J. R.
    Goswami, V.
    Joshi, H. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/412334.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    6-Fluoro chroman
    1,2,4-triazole
    triazolothiadiazole
    antimicrobial activity
    Opis:
    Some novel 6-fluoro chroman derivatives having 1,2,4-triazolo-[3,4-b]thiadiazole were synthesized and characterized by IR, NMR and mass spectral analysis. All synthesized compounds were screened for antimicrobial activity using broth dilution method. All the compounds showed good antimicrobial activity and compound 5e showed significant antibacterial activity.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2014, 7; 45-52
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis and characterization of some new Schiff bases of 2-oxonaphtho[2,1-b][1,4]oxazine
    Autorzy:
    Chovatiya, P.
    Mehta, C.
    Senjani, H.
    Shah, A.
    Joshi, H. S.
    Powiązania:
    https://bibliotekanauki.pl/articles/411737.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    2-Oxonaphtho[2,1-b][1,4]oxazine
    Schiff base
    Opis:
    The literature review reveal that [1,4]-oxazine derivatives represent one of the most active classes of compounds possessing wide spectrum of biodynamic activities and use as potent therapeutic agents. In the present work, a series of Schiff base of 2-(2,3-dihydro-2-oxonaphtho[2,1-b][1,4]oxazin-1-yl)acetohydrazide, 5a-5j has been synthesized using 1-aminonaphthalen-2-ol. Various aromatic aldehyde were react with carbohydrazide 4 in the presence of acid to produce the 2-oxonaphtho[2,1-b][1,4]oxazin Schiff base derivatives with good yields. All synthesized compounds were characterized by IR, NMR and Mass spectrometry analysis.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2014, 12; 26-30
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis, characterization and biological property of 3-(5-bromothiophen-2-yl)-6-phenyl-1,7a-dihydro-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazole derivatives
    Autorzy:
    Joshi, Harsh H.
    Parsania, M. V.
    Powiązania:
    https://bibliotekanauki.pl/articles/1075472.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    antibacterial
    thiadiazole
    triazole
    Opis:
    A library of novel 3-(5-bromothiophen-2-yl)-6-phenyl-1,7a-dihydro-[1,2,4]triazolo[3,4-b][1,3,4]thiadiazole were synthesized in excellent yields via domino one-pot two component reactions of 4-amino-3-(5-bromothiophen-2-yl)-4,5-dihydro-1H-1,2,4-triazole-5-thiol and benzoic acid derivatives respectively. A triazolo-thiadiazole system may be viewed as a cyclic analogue of two very important components - thiosemicarbazide and biguanide which often display diverse biological activities. The significant advantages of this reaction include one-pot process, simple work-up procedure, excellent yields and no column chromatographic purification. All intermediates and final compounds were confirmed by 1H NMR, 13C NMR, Mass Spectroscopy methods and IR analysis.
    Źródło:
    World Scientific News; 2019, 126; 291-298
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Biochemical constituents in leaf of Carica papaya - ethnomedicinal plant of Kachchh region
    Autorzy:
    Vyas, S.J.
    Khatri, T.T.
    Ram, V.R.
    Dave, P.N.
    Joshi, H.S.
    Powiązania:
    https://bibliotekanauki.pl/articles/11094.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    biochemical constituent
    leaf
    fruit
    seed
    Carica papaya
    papaya
    medicinal plant
    ethnomedicine
    treatment
    Kachchh region
    India
    Opis:
    Carica papaya Linn. is one of the valuable plant used for various purposes in medicinal field. Leaves, fruit and seeds of the C. papaya are used as ethnomedicine. This work describes biochemical constituents of leaves of C. papaya. Fresh leaves samples of the plant were collected during the month of January, 2013 from different parts of Bhuj in Kachchh district (Gujarat), India. The purpose of the study was to evaluate the biochemical composition in leaves of C. papaya growing in the semi-arid region of Gujarat and based on the result to justify its importance in various treatments of diseases. The dried leaves were further analyzed for biochemical constituents like Ca2+, Mg2+, Na+, K+, Clˉ and Li+. The results indicated that the leaf extract of C. papaya has high potentiality for curing number of diseases.
    Źródło:
    International Letters of Natural Sciences; 2014, 07
    2300-9675
    Pojawia się w:
    International Letters of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ocular cysticercosis with intermittent blindness
    Autorzy:
    Sharma, R.
    Dey, A.K.
    Joshi, K.
    Thakkar, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/6538.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Parazytologiczne
    Tematy:
    ocular cysticercosis
    cysticercosis
    intermittent blindness
    blindness
    larva
    Taenia solium
    parasite
    Opis:
    We report this peculiar case of ocular cysticercosis with intermittent blindness which is never reported to our knowledge. This case highlights use of Ultrasound for examination of the posterior segment of eye globe. In limited facilities Ultrasound is the main modality to reach the diagnosis. We also wish to enforce the point that in endemic regions and in young population primary cysticercosis and its complications must be kept in differentials of cystic mass or calcified mass, as in this case, we have seen both the stages of cysticercosis progression.
    Źródło:
    Annals of Parasitology; 2015, 61, 4
    0043-5163
    Pojawia się w:
    Annals of Parasitology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Greener, facile and ultrasound assisted synthesis of 1,2,3-triazole via CuAAC of 2-(azidomethyl)-1H-benzo[d]imidazole and alkynes and their evaluation of antimicrobial activity
    Autorzy:
    Kapupara, Vimalkumar H.
    Kalavadiya, Prakash L.
    Gojiya, Dinesh G.
    Parmar, Nilesh D.
    Joshi, Hitendra S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1075696.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    1
    1H-benzo[d]imidazole azide
    2
    3-triazol-1-yl)methyl)-1H-benzo[d]imidazole
    3-triazole via CuAAC
    4-disubstituted 1H-1
    alkynes
    antimicrobial
    copper(I) catalyst
    Opis:
    An expeditious room temperature protocol for the synthesis of 1,4-disubstituted 1H-1,2,3-triazol-1-yl)methyl)-1H-benzo[d]imidazole from [3+2] cyclization by using 1H-benzo[d]imidazole azide and various substituted terminal alkynes and copper(I) as a catalyst. This synthetic approach has been various prominent features such as fewer reaction steps, Good Yield, simple reaction condition and no any further purification required. Characterizations of all the synthesized compounds were done by various spectroscopic techniques like FT-IR, NMR and Mass spectrometry. All the synthesized targeted compounds were screened and evaluated for their antimicrobial activities.
    Źródło:
    World Scientific News; 2019, 119; 139-167
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Design, Synthesis, Characterization and Biological evaluation of (4-(7-chloroquinolin-4-yl)piperazin-1-yl)(substitutedphenyl)methanones as antimicrobial agents
    Autorzy:
    Parmar, Nilesh D.
    Hadiyal, Sanjay D.
    Kapupara, Vimal H.
    Kalavadiya, Prakash L.
    Gojiya, Dinesh G.
    Bhatt, Tejal
    Vekariya, Mitesh B.
    Chovatiya, Pankaj J.
    Joshi, Hitendra S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1075589.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Chloroquinoline
    antimicrobial agents
    multistep synthesis
    piperazine
    Opis:
    A series of (4-(7-chloroquinolin-4-yl)piperazin-1-yl)(substitutedphenyl)methanones were prepared via multistep synthesis which involved acrylation without base, cyclisation, hydrolysis, decarboxylation, electrophilic chlorination reactions and subsequent chloro-amine coupling with various substituted benzoyl chloride derivatives. The structure of the synthesized compounds was established by using elemental analysis, FT-IR, 1H NMR, 13C NMR and Mass spectroscopy. All the novel compounds have been tested on thin layer chromatographic plate for purity and evaluated for their antimicrobial activity against gram positive and gram negative bacteria which demonstrated moderate to good antimicrobial activity.
    Źródło:
    World Scientific News; 2019, 122; 193-205
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-14 z 14

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