A5032983923- Synthesis and Characterization of Heterocyclic Compounds
- Synthesis and biological activity
- Synthesis of heterocyclic compounds
- Synthesis and Reactions of Organic Compounds
- Synthesis and Biological Evaluation
- Inorganic and Organometallic Chemistry
- Phenothiazines and Benzothiazines Synthesis and Activities
- Metal complexes synthesis and properties
- Chemical Synthesis and Reactions
- Organic and Inorganic Chemical Reactions
- Islamic Finance and Banking Studies
- Click Chemistry and Applications
- Synthesis and Reactivity of Sulfur-Containing Compounds
- Market Dynamics and Volatility
- Water resources management and optimization
- Structural and Chemical Analysis of Organic and Inorganic Compounds
- Monetary Policy and Economic Impact
- Synthesis of Organic Compounds
- Synthesis of β-Lactam Compounds
- Multicomponent Synthesis of Heterocycles
- Organometallic Compounds Synthesis and Characterization
- Fiscal Policy and Economic Growth
- Entrepreneurship Studies and Influences
- Synthesis of Tetrazole Derivatives
- Chemical Reaction Mechanisms
Al-Neelain University
2023
Al-Quds University
2012-2023
American University in Cairo
2023
Assiut University
1995-2010
Water resources is a crucial environmental good for the function of human societies and ecosystems. Moreover, water an important input economy indispensable factor economic growth. Especially in regions that are facing scarcity, adoption management policies approaches fostering sustainable use while promoting growth becomes emerging issue. The Mediterranean region one most vulnerable regarding availability due to climate change activities. Water-Energy-Food (WEF) Nexus offers integrated...
Purpose This empirical paper aims to examine the impact of interest rate (IR) and political instability (POLINS) on Palestine's domestic private investment. Design/methodology/approach A set econometric techniques time series data are adopted meet study objectives. They include regression analysis, unit root tests, cointegration test, ARDL & Bound VAR test Granger causality test. Findings The study's primary results complement neoclassical approach, which states that IR is negatively...
Abstract This study aims to introduce a proposed model for transforming the Palestine Polytechnic University (PPU) into an entrepreneurial university. Towards that end, quantitative approach using statistical techniques of t test, ANOVA, Kruskal–Wallis and Pairwise comparisons supported by explanatory qualitative discussions were utilized. The main findings show applicability entrepreneurship at PPU was relatively fair aspects compatibility curricula with labor market needs, community...
Abstract 3‐Aryloxymethyl‐4‐amino‐5‐mercapto‐s‐triazoles (1 a–c ) reacted with alkyl/aralkyl halides to give 5‐alkyl/aralkyl thio‐s‐triazole derivatives (2 a–i and substituted phenacyl bromides afforded s‐triazolo‐thiadiazines (3 a–l ). Condensation of 1 aromatic/heterocyclic aldehydes furnished the corresponding schiff bases 4 a–r . The latter compounds (4 b,h,n were further according Mannich reaction affording 5 a–f 6 Moreover, interaction yielded bicyclic 7 Some these screened in vitro for...
Banking is an essential sector of Palestine's economy. More credits provided by banks are considered to have a positive impact on economic growth so that the overall objective this study examine bank lending in Palestine. The employs Augmented Dickey-Fuller test for stationarity time series, Johansen co-integration, Vector Autoregressive Model and Error Correction employed identify long-run short-run dynamics among variables, Granger causality order determine direction causality. finds long...
Abstract Interaction of [Ph2PC(═CH2)PPh2] (A)1–3 and/or [Ph2P (CH═CH) PPh2](B) ligands in different molar ratio with hexacarbonyl metals M(CO)6 gives [M(CO) n Ph2PC(═CH2)PPh2] Ph2P (CH═CH)PPh2 where M═ Cr, Mo or W, = 2 4]. The carbon diphosphine complexes type (A) which form four heteromemebered rings (B) five heteromembered reacts (addition reaction) some amines (methyl amine, dimethyl amine), phenyl hydrazine amino acids (glycine, alanine, aspartic acid, serene). structures A B and their...
This study aims at providing an idea about the directional effect of working capital management and liquidity on profitability vice versa. Econometric techniques unit root tests, cointegration, two-step Engle Granger method with error correction model are all applied a panel data for 11th manufacturing firms listed in PEX over period from 2007 to 2012. The findings show that there is bidirectional causal relationship between profitability, unidirectional running profitability. Accordingly,...
Purpose The aim of this study is to provide an empirical investigation the agricultural cluster’s economic, social and environmental values. By doing so, authors offer policymakers decision-makers a strategic approach that promotes competitiveness economic development through shared value. Design/methodology/approach used AMOS software applied structural equation modeling achieve study’s objectives. with path analysis Analysis Moment Structures software. Findings results indicate creating...
Ethyl (4-aryl-3-cyano-5,6,7,8-tetrahydro-2-quinolinylthio) acetate ( IIa, IIb ) were prepared and reacted with hydrazine hydrate to give hydrazines IIIa, IIIb which underwent cyclization into thienoquinoline derivatives IVa, IVb . Reaction of phenyl isocyanate yielded semicarbazides Va, Vb Similarly, interacted methyl/phenyl isothiocyanates affording the corresponding thiosemicarbazide VIa - VId XIVa, XIVb respectively. On other hand, condensation acetylacetone gave pyrazole VII treatment...
Purpose The purpose of this paper is to map the cluster in leather and shoes sector for improving competitiveness firms. Toward end, study organized examine impact clustering on improvement. influence competitive elements performance (Porter’s diamond) balanced score card was utilized. Design/methodology/approach A random sample 131 respondents chosen during period from May 2016 July 2016. structural equation modeling (SEM) analysis applied investigate research model. This approach because...
Recently a new debate has started regarding food and energy issues because become an alternative source of becoming the main input agriculture. However, this study attempts to investigate possible long-term relationship between prices crude oil commodities represented by maize, wheat, sorghum, soybean, barley, linseed oil, soybean palm oil. Time series econometric techniques (Unit root tests, Co-integration, Granger causality) were applied. The utilizes monthly data over period 1980 2009....
Abstract Novel azo‐dyes have been synthesized by diazotization of 4‐amino benzene‐4′‐(substituted heterocyclo) sulphonamide derivatives and coupling with 1‐oxa‐4‐thia‐spiro[4,4]nonan‐2‐one (I) and/or l‐oxa‐4‐thia‐spiro[4,5]decan‐2‐one (I′) in acid medium to give the corresponding 3‐azo‐(4′‐substituted benzenesulphonamido)‐l‐oxa‐4‐thia‐spiro[4,4]nonan‐2‐one (II‐IX) (II′‐IX′] as spiro‐ligands. Treatment these ligands metal salts iron (Fe 3+ ), copper (Cu 2+ ) mercury (Hg chlorides ethanolic...
Abstract Alkylation of 2-mercapto-3-cyano-4-aryl-5,6,7,8-tetrahydroquinoline (I) gave compounds II–IV. Cyclization III and IV afforded thienoquinolines V VI respectively. On diazotization VI, the corresponding triazinone derivatives VII VIII were obtained. Also, reaction with benzoyl chloride yielded tetracyclic compound IX. Structures new established by their elemental analyses spectral data. Some these screened in vitro for antibacterial activities.
Abstract Some New azo sulphonamide derivatives containing 8‐hydroxyquinoline moiety and their complexes with some transition metal ions vz. Fe +3 , Co +2 Ni Cu Hg have been prepared characterised. The stereochemistry as well the type of bonding around were determined on basis microanalysis, IR UV‐VIS spectra, conductivity magnetic moment measurements; thermal behaviour was also studied. coordinate exclusively to moiety. biological activity tested against a number bacteria. Chelation ligands...
Abstract The Vilsmeier-Haak reaction on 3-methylpyrazolone azosulphonamide derivatives (1,2) has been shown to lead chlorination of the 5-oxopyrazolone system in addition diformylation 3-methyl group give corresponding aminoacroleins (3,4), respectively. On treatment with some reagents 3, 4 compounds 9–20 different heterocyclic systems 3-position.
Abstract Some novel azo‐Sulpha drugs as 3‐methyl‐ N ‐azo‐(4′‐substituted heterocyclo‐benzene‐sulphamoyl) quinoxaline‐2‐ones (1‐11) and heterocyclo‐benzene‐sulphamoyl)‐quinoxaline‐2‐thiones (1′–11′) were synthesized by coupling 4′‐substituted heterocyclo‐benzene‐sulphamoyl diazonium acetates with ‐(1H)‐quinoxaline‐2‐one and/or (1H) quinoxaline‐2‐thione in acid medium. The corresponding iron (III) (1a‐11, 1′a‐11′a) copper (II) (1b‐1b′‐7b′) mercury (1c‐11c, 1c′‐11c) chelates also prepared a 1:1...
Some new drugs containing both azo sulfonamide and 8-hydroxyquinoline moieties have been prepared. metal chelates with Fe 3+ , Co 2+ Cu Ni Hg ions synthesized screened in vitro for their antibacterial activity.
This study provides expedient methods for the synthesis of some novel fused heteropolycycles.Thus, a variety di-, tri-and tetracyclic nitrogen and nitrogen-sulfur heteropolycycles 8, 9, 11-15 were smoothly synthesized by Friedel-Crafts intramolecular alkylations heteroarylalkanols 1-7 in presence both Brönsted (PPA PTSA) Lewis (AlCl 3 /CH NO 2 ) acid catalysts.The precursor alkanols readily prepared reaction corresponding carboxylic esters with methylmagnesium iodide.The structures compounds...
Abstract The existence of an underground economy may hide the official number unemployed persons, their share in labour force, and wages. It also gives rise to economic social conditions individuals, household countries, which are evaluated a biased way if one relies on statistics. In this paper, we use currency demand model Tanzi estimate Palestine over period: (2008–2017). Toward that end, group econometric techniques time series data was applied. main empirical results show reached up...
Abstract The Vilsmeier-Haack reaction on 4,4′-bi-4H-pyrazole-5,5′(1H, 1H′)-dione brought about the formation of one methyl group, chloro substitution a carbonyl group in 5-position, and cyclization 5-chloro-3-(2-amino-1-formylethenyl)derivative step to give corresponding furo[2,3-c:5,4-c′]dipyrazole (3). Treatment 3 with some secondary heterocyclic amines gave aminomethylene derivatives 6–8. Interaction hydroxylamine hydrochloride, hydrazine hydrate phenylhydrazine afforded isoxazolyl...