Výsledky vyhledávání - "H. Firouzabadi"

Silica-Polyethyleneglycols/N 2 O 4 Complexes as Heterogeneous Nitrating and Nitrosating Agents

Autor: Naser Iranpoor, Reza Heydari, H. Firouzabadi

Publikováno v: Phosphorus, Sulfur, and Silicon and the Related Elements. 178:1027-1035

Silica-chloride was reacted with different quantities of H(OCH 2 CH 2 ) n OH (n = 2-4) to furnish silica-based linear polyethylene glycols and cyclic polyethylene glycolic ethers. The N 2 O 4 complex of silica-tetraethylene glycolic ether ( III ) was

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ff647a59c4cfadb56caa27dc050310b7
https://doi.org/10.1080/10426500307863

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Highly Efficient and Chemoselective Thioacetalization of Carbonyl Compounds Catalyzed with Aluminum Trifluromethanesulfonate [Al(OTf)3]

Autor: H. Firouzabadi, G. Kohmareh, Naser Iranpoor

Publikováno v: Synthetic Communications. 33:167-173

Aluminum trifluromethanesulfonate [Al(OTf)3] is a highly efficient and chemoselective catalyst for the thioacetalization of carbonyl compounds.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::029b23c726440bb38506f96ca82c4b06
https://doi.org/10.1081/scc-120015573

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Application of Ionic Complex of N 2 O 4 with 18-Crown-6 as an Oxidizing Agent for the Oxidation of Organosulfur Compounds

Autor: H. Firouzabadi, Naser Iranpoor, Reza Heydari

Publikováno v: Phosphorus, Sulfur, and Silicon and the Related Elements. 177:631-639

Complexation of gaseous N 2 O 4 with 18-Crown-6 affords an ionic complex of NO + ·;18-crown-6·;H(NO 3 ) m 2 . This reagent is a nitrosating agent for conversion of thiols to thionitrites. Disulfides can be obtained from coupling of thiols via thion

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https://doi.org/10.1080/10426500210273

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MOLYBDENUM PENTACHLORIDE (MoC15) CATALYZES EFFICIENT DITHIOACETALIZATION OF CARBONYL COMPOUNDS AND TRANSDITHIOACETALIZATION OF O, O-ACETALS. THIS CATALYST ALSO CONDUCTS EFFICIENT NON-HYDROLYTIC DEPROTECTION OF DITHIOACETALS IN THE PRESENCE OF DRY DMSO. PART 21

Autor: Babak Karimi, H. Firouzabadi

Publikováno v: Phosphorus, Sulfur, and Silicon and the Related Elements. 175:207-216

Dithioacetalization of carbonyl compounds was performed efficiently in CH2Cl2 at room temperature in the presence of MoCl5. Highly selective transdithioacetalization of acetals was also catalyzed efficiently by this catalyst. MoCl5 performed non-hydr

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b14e9152ac93afcfe21a9028f85368c9
https://doi.org/10.1080/10426500108040269

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Ionic Complex of N2O4with 18-Crown-6: A Highly Efficient and Selective Reagent for Nitration of Phenols

Autor: Naser Iranpoor, Reza Heydari, H. Firouzabadi

Publikováno v: Synthetic Communications. 29:3295-3302

Interaction of gaseous N2O4 with 18-crown-6 affords the stable crystalline complex of NO+·18-crown-6·H(NO3)2. This ionic complex is an efficient nitrating agent for the selective mono-, di-, and trinitration of phenol and also for the selective mon

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9bcf255ede6c0c26f6df651b8c928d2b
https://doi.org/10.1080/00397919908085957

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Oxidation By Manganese Dioxide (mno2) Catalysed With H2SO4/silica gel. Efficient solvent-Free Oxdation Of Thioethers To Their Corresponding Sulfoxides

Autor: M. Abbasi, H. Firouzabadi

Publikováno v: Synthetic Communications. 29:1485-1491

H2SO4 mixed with silica gel (1:2) by weight produces a white powder which is an effective catalyst for the oxidation of thioethers to their corresponding sulfoxide by Mn02 under solvent-free conditions.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1735d761af5416312c39c632022f8f36
https://doi.org/10.1080/00397919908086128

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Modified Borohydride Agents; Efficient Reduction of Azides with (1,4-Diazabicyclo[2.2.2]octane) (Tetrahydroborato)zinc Complex [Zn(BH4)2(dabco)] and Methyltriphenylphosphonium Tetrahydroborate [MePh3P+BH4−]

Autor: H. Firouzabadi, Behzad Zeynizadeh, Mina Adibi

Publikováno v: Synthetic Communications. 28:1257-1273

(1,4-Diazabicyclo[2.2.2]octane)(tetrahydroborato)zinc complex and methyltriphenylphosphonium tetrahydroborate are stable modified borohydrides which are used for the efficient reduction of aryl, alkyl, and aroyl azides with excellent yields in THF or

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::277c4b6989ada5e397d5aa79f180bb59
https://doi.org/10.1080/00397919808005968

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Facile Deprotection of Trimethylsilyl Ethers With Modified Borohydride Agents; 1-Benzyl-4-AZA-1-Azoniabicyclo[2.2.2]Octane Tetrahydroborate (Baaotb)1Versus Tetrabutylammonium Tetrahydroborate(TBATB)

Autor: H. Firouzabadi, G. R. Afsharifar

Publikováno v: Synthetic Communications. 26:1065-1073

Deprotection of structurally different trimethylsilyl ethers with the modified borohydride agents BAAOTB and TBATB to their corresponding alcohols in reflexing t-BuOH is described. Both BAAOTB and TBATB are efficient reagents for this purpose. BAAOTB

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https://doi.org/10.1080/00397919608003713

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Bis[Trinitrato Cerium(IV)] Chromate; [(NO3)3Ce]2CrO4vs Trinitrato Cerium(IV) Chromate Dihydrate; [(NO3)3Ce] CrO4.2H2O in the oxidation of trimethylsilyl ethers

Autor: H. Firouzabadi, F. Shiriny

Publikováno v: Synthetic Communications. 26:649-655

Bis[trinitratocerium (IV)] chromate is able to proceed oxidative deprotection of trimethylsilyl ethers in benzene under reflux conditions. Trinitratocerium(IV)chwmate dihydrate is a very sluggish oxidant for this purpose.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a26d1a20eb91258a24b68c43736ef726
https://doi.org/10.1080/00397919608086737

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