The Experts below are selected from a list of 279 Experts worldwide ranked by ideXlab platform
N. K. Lyapina - One of the best experts on this subject based on the ideXlab platform.
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synthesis of 1 1 3 alkylsulfanyl methyl tetrahydro 2h thiopyran 3 5 diyl diethanones from Sodium Sulfide and thiols
ChemInform, 2012Co-Authors: L. A. Baeva, L. F. Biktasheva, T. S. Nikitina, A. A. Fatykhov, N. K. LyapinaAbstract:The direct condensation of thiols (I) with formaldehyde (II), acetone (III) and Sodium Sulfide leads to title compounds (IV) in good yields.
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Synthesis of 1,1′-{3-[(Alkylsulfanyl)methyl] tetrahydro-2H-thiopyran-3,5-diyl}diethanones from Sodium Sulfide and Thiols.
ChemInform, 2012Co-Authors: L. A. Baeva, L. F. Biktasheva, T. S. Nikitina, A. A. Fatykhov, N. K. LyapinaAbstract:The direct condensation of thiols (I) with formaldehyde (II), acetone (III) and Sodium Sulfide leads to title compounds (IV) in good yields.
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Synthesis of 1,1'-{3-[(alkylsulfanyl)methyl]-tetrahydro-2H-thiopyran-3,5-diyl}diethanones from Sodium Sulfide and thiols
Chemistry of Heterocyclic Compounds, 2012Co-Authors: L. A. Baeva, L. F. Biktasheva, T. S. Nikitina, A. A. Fatykhov, N. K. LyapinaAbstract:The reaction of Sodium Sulfide and thiols with formaldehyde and acetone in a solution of Sodium hydroxide or in ethanol gave 1,1'-{3-[(alkylsulfanyl)methyl]tetrahydro-2H-thiopyran-3,5-diyl}dietha-nones.
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synthesis of 1 1 3 alkylsulfanyl methyl tetrahydro 2h thiopyran 3 5 diyl diethanones from Sodium Sulfide and thiols
Chemistry of Heterocyclic Compounds, 2012Co-Authors: L. A. Baeva, L. F. Biktasheva, T. S. Nikitina, A. A. Fatykhov, N. K. LyapinaAbstract:The reaction of Sodium Sulfide and thiols with formaldehyde and acetone in a solution of Sodium hydroxide or in ethanol gave 1,1'-{3-[(alkylsulfanyl)methyl]tetrahydro-2H-thiopyran-3,5-diyl}dietha-nones.
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Synthesis of thiamono- and thiabicyclanes from Sodium Sulfide and methanethiolate
Chemistry of Heterocyclic Compounds, 2009Co-Authors: L. A. Baeva, A. D. Ulendeeva, O. V. Shitikova, N. K. LyapinaAbstract:1-[5-Acetyl-3-(methylthiomethyl)tetrahydro-3-thiopyranyl]-1-ethanone was obtained by the interaction of Sodium Sulfide and Sodium methanethiolate with formaldehyde and acetone. The intramolecular crotonate condensation of the product leads to 4-methyl-1-methylthiomethyl-7-thiabicyclo[3.3.1]non-3-en-2-one. The participation of 3-methylthiomethyl-3-buten-2-one in the formation of a thiamono-cyclane is clarified. A probable scheme for the conversions is proposed.
Ali Almourabit - One of the best experts on this subject based on the ideXlab platform.
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Sodium Sulfide a sustainable solution for unbalanced redox condensation reaction between o nitroanilines and alcohols catalyzed by an iron sulfur system
Synthesis, 2015Co-Authors: Thanh Binh Nguyen, Ludmila Ermolenko, Ali AlmourabitAbstract:Unbalanced redox condensation reaction between o-nitroanilines and alcohols, leading to benzimidazole and quinoxaline heterocycles can be efficiently promoted and catalyzed by Sodium Sulfide (40 mol%) in combination with iron(III) chloride hexahydrate (1 mol%). Beside the role as a precursor for the iron–sulfur (Fe/S) catalyst formation, hydrated Sodium Sulfide was shown to be an excellent noncompetitive, multi-electron reducing agent.
L. A. Baeva - One of the best experts on this subject based on the ideXlab platform.
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synthesis of 1 1 3 alkylsulfanyl methyl tetrahydro 2h thiopyran 3 5 diyl diethanones from Sodium Sulfide and thiols
ChemInform, 2012Co-Authors: L. A. Baeva, L. F. Biktasheva, T. S. Nikitina, A. A. Fatykhov, N. K. LyapinaAbstract:The direct condensation of thiols (I) with formaldehyde (II), acetone (III) and Sodium Sulfide leads to title compounds (IV) in good yields.
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Synthesis of 1,1′-{3-[(Alkylsulfanyl)methyl] tetrahydro-2H-thiopyran-3,5-diyl}diethanones from Sodium Sulfide and Thiols.
ChemInform, 2012Co-Authors: L. A. Baeva, L. F. Biktasheva, T. S. Nikitina, A. A. Fatykhov, N. K. LyapinaAbstract:The direct condensation of thiols (I) with formaldehyde (II), acetone (III) and Sodium Sulfide leads to title compounds (IV) in good yields.
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Synthesis of 1,1'-{3-[(alkylsulfanyl)methyl]-tetrahydro-2H-thiopyran-3,5-diyl}diethanones from Sodium Sulfide and thiols
Chemistry of Heterocyclic Compounds, 2012Co-Authors: L. A. Baeva, L. F. Biktasheva, T. S. Nikitina, A. A. Fatykhov, N. K. LyapinaAbstract:The reaction of Sodium Sulfide and thiols with formaldehyde and acetone in a solution of Sodium hydroxide or in ethanol gave 1,1'-{3-[(alkylsulfanyl)methyl]tetrahydro-2H-thiopyran-3,5-diyl}dietha-nones.
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synthesis of 1 1 3 alkylsulfanyl methyl tetrahydro 2h thiopyran 3 5 diyl diethanones from Sodium Sulfide and thiols
Chemistry of Heterocyclic Compounds, 2012Co-Authors: L. A. Baeva, L. F. Biktasheva, T. S. Nikitina, A. A. Fatykhov, N. K. LyapinaAbstract:The reaction of Sodium Sulfide and thiols with formaldehyde and acetone in a solution of Sodium hydroxide or in ethanol gave 1,1'-{3-[(alkylsulfanyl)methyl]tetrahydro-2H-thiopyran-3,5-diyl}dietha-nones.
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Synthesis of thiamono- and thiabicyclanes from Sodium Sulfide and methanethiolate
Chemistry of Heterocyclic Compounds, 2009Co-Authors: L. A. Baeva, A. D. Ulendeeva, O. V. Shitikova, N. K. LyapinaAbstract:1-[5-Acetyl-3-(methylthiomethyl)tetrahydro-3-thiopyranyl]-1-ethanone was obtained by the interaction of Sodium Sulfide and Sodium methanethiolate with formaldehyde and acetone. The intramolecular crotonate condensation of the product leads to 4-methyl-1-methylthiomethyl-7-thiabicyclo[3.3.1]non-3-en-2-one. The participation of 3-methylthiomethyl-3-buten-2-one in the formation of a thiamono-cyclane is clarified. A probable scheme for the conversions is proposed.
Thanh Binh Nguyen - One of the best experts on this subject based on the ideXlab platform.
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Sodium Sulfide a sustainable solution for unbalanced redox condensation reaction between o nitroanilines and alcohols catalyzed by an iron sulfur system
Synthesis, 2015Co-Authors: Thanh Binh Nguyen, Ludmila Ermolenko, Ali AlmourabitAbstract:Unbalanced redox condensation reaction between o-nitroanilines and alcohols, leading to benzimidazole and quinoxaline heterocycles can be efficiently promoted and catalyzed by Sodium Sulfide (40 mol%) in combination with iron(III) chloride hexahydrate (1 mol%). Beside the role as a precursor for the iron–sulfur (Fe/S) catalyst formation, hydrated Sodium Sulfide was shown to be an excellent noncompetitive, multi-electron reducing agent.
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Sodium Sulfide: A Sustainable Solution for Unbalanced Redox Condensation Reaction between o-Nitroanilines and Alcohols Catalyzed by an Iron–Sulfur System
Synthesis, 2015Co-Authors: Thanh Binh Nguyen, Ludmila Ermolenko, Ali Al-mourabitAbstract:Unbalanced redox condensation reaction between o-nitroanilines and alcohols, leading to benzimidazole and quinoxaline heterocycles can be efficiently promoted and catalyzed by Sodium Sulfide (40 mol%) in combination with iron(III) chloride hexahydrate (1 mol%). Beside the role as a precursor for the iron–sulfur (Fe/S) catalyst formation, hydrated Sodium Sulfide was shown to be an excellent noncompetitive, multi-electron reducing agent.
Mariliz Gutterres - One of the best experts on this subject based on the ideXlab platform.
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Environmentally friendly hide unhairing: Enzymatic-oxidative unhairing as an alternative to use of lime and Sodium Sulfide
Process Safety and Environmental Protection, 2015Co-Authors: E. Andrioli, L. Petry, Mariliz GutterresAbstract:Various studies have been conducted to develop technologies that minimize the environmental concerns associated with the leather industry. The use of enzymes and oxidizing products during the unhairing step reduces pollution by tanneries as well as process time. In this study, were used an enzymatic extract produced by a strain of Bacillus subtilis - BLBc 11 - and hydrogen peroxide to conduct enzymatic-oxidative unhairing as an alternative to the conventional process (lime and Sodium Sulfide). Tests for enzymatic-oxidative unhairing were performed by applying crude enzymatic extract at concentrations of 100 U g-1 and 300 U g-1 of hide and hydrogen peroxide at concentrations of 4% and 8%. Tests were conducted comparing the proposed unhairing method, the conventional unhairing and purely enzymatic unhairing, performed with crud enzymatic extract produced by strain BLBc 11. The results showed that the proposed enzymatic-oxidative unhairing method can be used as an alternative to lime and Sodium Sulfide.