Synthesis and Anti-Aphid Aphis Gossypii Glover Activity of Some New Quinoline Derivatives

Aly, Moustafa H.; El-Mageed, A. E. M. Abd; Kafafy, Abdel El; Nawwar, Galal A. M.

doi:10.2478/v10045-011-0020-1

Cited by 3 publications

(2 citation statements)

References 22 publications

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“…Conventional and unconventional methods for the synthesis of alkylidene thiosemicarbazide had been extensively reported (58)(59)(60)(61)(62)(63). Most of these methods involve condensation reaction of carbonyl compounds and thiosemicarbazide in alcohol with catalytic amounts of acetic acid or mineral acids for about 3-72 h at room temperature or under reflux (59)(60)(61)(62)(63)(64). Moreover, recently a more facile synthesis under ultrasound or microwave (MW)assisted methods were reported (58).…”

Section: Resultsmentioning

confidence: 99%

Transalkylidation reaction: green, catalyst-free synthesis of thiosemicarbazones and solving the NMR conflict between their acyclic structure and intramolecular cycloaddition products

El‐Atawy

Omar

Hagar

et al. 2019

Green Chemistry Letters and Reviews

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A series of arylidene thiosemicarbazides have been prepared by a new method, which was titled as transalkylidation. This method is an effective, fast, green and clean method. The mechanism of this reaction has been discussed. Moreover, we clarified the divergences of the structural assignments reported in the literature for the reaction of thiosemicarbazide and aldehydes or ketones in the presence of different catalysts. Where 1,2,4-triazolidine-3-thiones were incorrectly reported as sole product of such reaction, based on occurance of intramolecular cycloaddition of thiosemicarbazones formed in situ. Our findings proved that the reaction stops at earlier stage of thiosemicarbazone and neither cyclization to 1,2,4-triazolidine-3-thiones nor 2-amino-1,3,4-thiadiazoline take place. We have removed the confusion of the NMR interpretation of thiosemicarbazone and their cycloaddition product by carrying out 1 H-NMR, 13 C-NMR, 15 N-NMR and 1 H-15 N HSQC experiments with temperature gradient. Furthermore, DFT-NMR calculations have been done to make structural distinguish between the three possible structural isomers for this reaction, namely, 1,2,4triazolidene-3-thione, 2-amino-1,3,4-thiadiazoline and thiosemicarbazone.

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Section: Resultsmentioning

confidence: 99%

Transalkylidation reaction: green, catalyst-free synthesis of thiosemicarbazones and solving the NMR conflict between their acyclic structure and intramolecular cycloaddition products

El‐Atawy

Omar

Hagar

et al. 2019

Green Chemistry Letters and Reviews

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“…As our program aims to develop an environmentally friendly approach to synthesize bioactive products using agro-waste instead of petrochemicals [33][34][35][36], the black liquor obtained from the solar pulping of rice straw [6] was used in the current study along with chicken feather waste to prepare and evaluate the biopesticidal activity of a new formulation and its e ciency when applied as seed dressing and soil drench to control root rot and root knot diseases of green beans in natural eld conditions.…”

Section: Introductionmentioning

confidence: 99%

Biopesticidal Activity for Controlling Root Rot and Root Knot Infection of Green Beans under Natural Field Conditions Utilizing Biowastes

Nawwar,

Othman,

Abdel-Kader

et al. 2023

Preprint

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The current study investigates using of alkaline black liquor (ABL), a byproduct of rice straw pulping, to create a bio-active formulation that can inhibit the growth of soilborne plant pathogens. ABL was first treated to precipitate lignin, silica, and fatty acids as a calcium complex (Ca-LSF). The resulting effluent was used to digest chicken feathers under mild conditions. The resulting protein hydrolysate was added to Ca-LSF complex affording a novel formulation to be evaluated against soilborne pathogenic fungi Fusarium oxysporum, Fusarium solani, Rhizoctonia solani, and Sclerotium rolfsii, as well as the nematode Meloidogyne incognita, the causal organisms of wilt, root rot and root knot diseases. The prepared formulation showed strong inhibitory effect against R. solaniand affected viability of M. incognita. This effect increased with increasing concentration, up to 4%, which completely inhibited fungal growth. It was also examined under field conditions, where it reduced root rot and root knot infection. Application of this formulation as seed dressing showed higher efficacy against root rot and root knot infection than its soil drench treatment, although both treatments were superior to untreated control. The presented safe, cost-effective, and eco-friendly formulation could be used to control a wide range of soilborne plant pathogens.

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Entomopathogenic fungi Beauveria sp. and Aspergillus sclerotiorum can produce secondary metabolite quinidine

Anggiani

Listiyowati

Rahayu

2020

IOP Conf. Ser.: Earth Environ. Sci.

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Entomopathogenic fungi have been reported to produce secondary metabolite quinolines. One of the quinoline alkaloids is quinidine, a compound that has antiarrhythmic properties, therefore it has an economic important value. The aim of the experiment reported here was to study the potency of entomopathogenic fungi Beauveria sp. IPBCC. 19.1499 and Aspergillus sclerotiorum IPBCC.19.1500 in producing quinidine. The quinidine was obtained from a broth culture of each fungus grown in Potato Dextrose Broth medium (pH 6.2, static, room temperature) for 7, 14, and 21 days incubation period. At harvest, broth of each culture was extracted using chloroform. The extract then dried using an evaporator. The presence of quinidine in the extracted was detected by HPLC. The dry weight of fungal biomass and the crude extract of broth culture were also recorded. HPLC analysis showed that quinidine was produced by both fungi tested. The species of the fungus and incubation period significantly affected quinidine production. Beauveria sp. IPBCC.19.1499, in general, produced quinidine in higher concentration than that of A. sclerotiorum IPBCC.19.1500. The quinidine concentration increased significantly with increasing incubation period. The quinidine concentration was also positively correlated with biomass dry weight, while the crude extract dry weight was negatively correlated with quinidine concentration.

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Synthesis and Anti-Aphid Aphis Gossypii Glover Activity of Some New Quinoline Derivatives

Cited by 3 publications

References 22 publications

Transalkylidation reaction: green, catalyst-free synthesis of thiosemicarbazones and solving the NMR conflict between their acyclic structure and intramolecular cycloaddition products

Transalkylidation reaction: green, catalyst-free synthesis of thiosemicarbazones and solving the NMR conflict between their acyclic structure and intramolecular cycloaddition products

Biopesticidal Activity for Controlling Root Rot and Root Knot Infection of Green Beans under Natural Field Conditions Utilizing Biowastes

Entomopathogenic fungi Beauveria sp. and Aspergillus sclerotiorum can produce secondary metabolite quinidine

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