Zobrazeno 1 - 10 of 22 pro vyhledávání: '"Davood Sheikh"'
1
Sulfate Sulfuric Acid (SUSA)/NaNO2: Efficient Procedure for N-Nitrosation of Secondary Amines and DFT Studies of the Products
Autor: Lotfi Shiri, Davood Sheikh, Sakineh Janinia, Masoome Sheikhi
Publikováno v: Chemical Methodologies, Vol 3, Iss Issue 4, pp. 392-570., Pp 392-407 (2019)
We present the preparation and characterization of sulfate sulfuric acid (SUSA) for the first time. The SUSA showed the best activity in efficient nitrosation of secondary amines under mild condition with excellent yields. Sulfate sulfuric acid (SUSA
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doajarticles::f2353c6daaa54626dc72887519ebc5d1
http://www.chemmethod.com/article_80330_3e16688f570d361a3417dfaccb799f34.pdf
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3
Akademický článek
Analysis of Obstacles and Problems of Entrepreneurship Development in Rural Areas (Case Study: Rural Areas of Tuyserkan Township)
Autor: Davood Sheikhi, Mahmood Amiri, Samaneh Ghamari
Publikováno v: جغرافیا و آمایش شهری منطقه‌ای, Vol 13, Iss 48, Pp 1-38 (2023)
The development of entrepreneurship and self-employment in rural areas requires cooperation and the creation of platforms that can create a favorable and supportive ecosystem for the development of entrepreneurship and the success of entrepreneurs. O
Externí odkaz: https://doaj.org/article/9686783fd69949c4b21f065a6abd920a
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4
Application of supported Mn(iii), Fe(iii) and Co(ii) as heterogeneous, selective and highly reusable nano catalysts for synthesis of arylaminotetrazoles, and DFT studies of the products
Autor: Davood Habibi, Davood Sheikh, Samaneh Abedi, Ali Reza Faraji, Masoome Sheikhi
Publikováno v: RSC Adv.. 4:47625-47636
M@Si/Al (where M = Mn(III), Co(II) and Fe(III) supported on nanosized SiO2/Al2O3) is applied as an efficient, highly reusable and heterogeneous catalyst for the regiospecific synthesis of 1-aryl-5-amino-1H-tetrazole in dimethylformamide (DMF) as a so
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1d66c05c0fd448c8f87ec6b0c7d704a4
https://doi.org/10.1039/c4ra06463a
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6
Theoretical Study Intramolecular Hydrogen Bond in Acetylacetone 3- substituted Derivatives: NMR, NBO analysis and Thermo-chemical Investigation
Autor: SEYED ABDOLLAH SEYED KATOULI, MASOOME SHEIKHI, DAVOOD SHEIKH, SAYYED FARAMARZ TAYYARI
Publikováno v: Oriental Journal Of Chemistry. 29:1121-1128
The strength of the O-H···O hydrogen bridge in acetylacetone (AA) and acetylacetone derivatives is depending on the nature and size of the substitute groups and on the substitution position. We investigated the effect of electron-pull and electron
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::574df5283efe5c9207e21ae80ce00b22
https://doi.org/10.13005/ojc/290338
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7
ZrOCl2 · 8H2O: An Efficient, Ecofriendly, and Recyclable Catalyst for Ultrasound-Accelerated, One-Pot, Solvent-Free Synthesis of 8-Aryl-7,8-dihydro-[1,3]dioxolo[4,5-g]quinolin-6-(5H)-one and 4-Aryl-3,4-dihydroquinolin-2(1 H)-one Derivatives
Autor: Davood Sheikh, Davood Azarifar
Publikováno v: Synthetic Communications. 43:2517-2526
A convenient, one-pot, solvent-free reaction of amines, aromatic aldehydes, and Meldrum's acid to form 8-aryl-7,8-dihydro-[1,3]dioxolo[4,5-g]quinolin-6-(5H)-one and 4-aryl-3,4-dihydroquinolin-2-(1H)-one in the presence of 10 mol% ZrOCl2.8H2O under ul
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5ca1299e4411f2eb9713f0f9b7de9df0
https://doi.org/10.1080/00397911.2012.718026
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8
Nano TiO2-supported Preyssler-type heteropolyacid (nanoTiO2/H14[NaP5W30O110]): an efficient and re-usable catalyst for the one-pot synthesis of N-acetyl-2-aryl-1,2-dihydro-(4H)-3,1-benzoxazin-4-ones
Autor: Seyed-Mola Khatami, Davood Sheikh, Davood Azarifar, Mohammad Ali Zolfigol
Publikováno v: Journal of the Iranian Chemical Society. 10:1039-1046
An efficient procedure has been developed for one-pot synthesis of N-acyle-2-aryl-1,2-dihydro-(4H)-3,1-benzoxazin-4-ones in the presence of Preyssler-type heteropolyacid acid modified nano-sized TiO2 as catalyst. The reactions proceed smoothly at 25
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2f3e25223ec29b9fe18225f1a7e361da
https://doi.org/10.1007/s13738-013-0242-4
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9
β-Naphthyl chlorothionoformate: an efficient, powerful and a new reagent for dealkylation tertiary amines
Autor: Faezeh Ghotbi, Mehdi M. Baradarani, Davood Sheikh
Publikováno v: Journal of Sulfur Chemistry. 33:397-402
β-Naphthyl chlorothionoformate is introduced as a powerful dealkylating agent. This reagent reacts rapidly with tertiary amines at room temperature and produces their thiocarbamate derivatives, whose yields were from good to excellent. Rates of reac
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b31984f710b98a7ad3ce657b49e52c61
https://doi.org/10.1080/17415993.2012.688828
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10
Ultrasound-Promoted Catalyst-Free Synthesis of 2,2′-(1,4-Phenylene)bis[1-acetyl-1,2-dihydro-4H-3,1-benzoxazin-4-one] Derivatives
Autor: Davood Sheikh, Davood Azarifar
Publikováno v: Helvetica Chimica Acta. 95:1217-1225
A convenient approach to 2,2′-(1,4-phenylene)bis[1-acetyl-1,2-dihydro-4H-3,1-benzoxazin-4-one] derivatives 4 was explored employing the one-pot condensation of anthranilic acids (=2-aminobenzoic acids) 1 with terephthalaldehyde (=benzene-1,4-dicarb
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f82be18aa858315a9d722e0f13688426
https://doi.org/10.1002/hlca.201100481
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