The Experts below are selected from a list of 9600 Experts worldwide ranked by ideXlab platform
Yinjian Sheng - One of the best experts on this subject based on the ideXlab platform.
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convenient synthesis of triphenylphosphanylidene spiro cyclopentane 1 3 indolines and spiro cyclopent 2 ene 1 3 indolines via three component reactions
ChemInform, 2014Co-Authors: Yinjian ShengAbstract:A one-pot three-component reaction of isatylidene malononitriles or ethylisatylidene cyanoacetate with dimethyl acetylene dicarboxylate and Triphenylphosphine is developed to yield spirocyclic adducts (IV).
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convenient synthesis of triphenylphosphanylidene spiro cyclopentane 1 3 indolines and spiro cyclopent 2 ene 1 3 indolines via three component reactions
Organic Letters, 2014Co-Authors: Yinjian ShengAbstract:Three-component reactions of Triphenylphosphine, but-2-ynedioate, and isatylidene malononitrile (ethyl cyanoacetate) in dimethoxyethane resulted in triphenylphosphanylidene spiro[cyclopentane-1,3′-indolines] in satisfactory yields. Furthermore, similar three-component reactions of Triphenylphosphine, hex-2-en-4-ynedioate, and isatylidene malononitrile (ethyl cyanoacetate) afforded functionalized spiro[cyclopent[2]ene-1,3′-indolines] in good yields.
Javad Amani - One of the best experts on this subject based on the ideXlab platform.
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staudinger aza wittig reactions utilizing a novel linear polymer supported Triphenylphosphine as a modified liquid phase reagent
Tetrahedron Letters, 2009Co-Authors: Hossein Mahdavi, Javad AmaniAbstract:A new Triphenylphosphine reagent linked to a linear maleimide-styrene copolymer is synthesized and is found to be effective for the formation of a variety of imines via the Staudinger/aza-Wittig reaction. This linear polymer-supported Triphenylphosphine has a unique solubility behavior and provides for a simple means of purifying the desired imine from the phosphine oxide by-product. The reactivity of this polymeric reagent is superior to that of the cross-linked polymer-supported phosphine reagent.
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Triphenylphosphine oxide supported on non cross linked maleimide styrene copolymer application as a novel hendrickson reagent
Tetrahedron Letters, 2008Co-Authors: Hossein Mahdavi, Javad AmaniAbstract:Abstract A new Triphenylphosphine oxide reagent linked to a linear maleimide–styrene copolymer is synthesized. This phosphine-bound copolymer is converted to copolymer-supported Triphenylphosphine ditriflate as a novel Hendrickson reagent by treatment with triflic anhydride. This reacts rapidly in various dehydration reactions such as anhydride, ester and amide formation. This linear and soluble support is also easily recovered and recycled several times without loss of efficiency.
Claudia Graiff - One of the best experts on this subject based on the ideXlab platform.
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role of bis Triphenylphosphine iminium cation pnp on the crystal packing of pnp hseo3 solvate salt
Crystals, 2018Co-Authors: Stefano Canossa, Claudia GraiffAbstract:Selenate(IV) and hydrogen selenate(IV) salts of bulky cations are very interesting compounds for synthetic and kinetic studies. In this work, bis(Triphenylphosphine)iminium ([PNP]+) chloride has been used, which aims to synthesize the corresponding selenate(IV) salt by an exchange reaction in the aqueous solution and subsequent crystallization by solvent evaporation. Unexpectedly, the procedure afforded a solvate form of the [PNP]+[HSeO3]− salt (1). In this solid phase, which has a structure that is determined by Single Crystal XRD, the anion tends to maximize the interactions with itself, although it leaves the cationic moiety to have only weak interactions with the anions and the solvent molecules. In turn, the latter builds a network of effective hydrogen bonds. This behavior opposes the general tendency of selenite(IV) and hydrogen selenite(IV) compounds, since these anions are commonly found to have formed effective hydrogen bonds with surrounding chemical species. Moreover, as the exchange reaction is non-quantitative, the exceeding traces of the starting bis(Triphenylphosphine)iminium chloride reagent reacted with bis(acetonitrile)dichloropalladium(II) to form the bis(Triphenylphosphine)iminium hexachloropalladate (2). In the solid phase, [PNP]+ causes the absence of strong supramolecular interactions, which highlights the peculiar behavior of the cation in the crystal packing of its solid phases.
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Role of Bis(Triphenylphosphine)iminium Cation [PNP]+ on the Crystal Packing of [PNP]+[HSeO3]− Solvate Salt
MDPI AG, 2018Co-Authors: Stefano Canossa, Claudia GraiffAbstract:Selenate(IV) and hydrogen selenate(IV) salts of bulky cations are very interesting compounds for synthetic and kinetic studies. In this work, bis(Triphenylphosphine)iminium ([PNP]+) chloride has been used, which aims to synthesize the corresponding selenate(IV) salt by an exchange reaction in the aqueous solution and subsequent crystallization by solvent evaporation. Unexpectedly, the procedure afforded a solvate form of the [PNP]+[HSeO3]− salt (1). In this solid phase, which has a structure that is determined by Single Crystal XRD, the anion tends to maximize the interactions with itself, although it leaves the cationic moiety to have only weak interactions with the anions and the solvent molecules. In turn, the latter builds a network of effective hydrogen bonds. This behavior opposes the general tendency of selenite(IV) and hydrogen selenite(IV) compounds, since these anions are commonly found to have formed effective hydrogen bonds with surrounding chemical species. Moreover, as the exchange reaction is non-quantitative, the exceeding traces of the starting bis(Triphenylphosphine)iminium chloride reagent reacted with bis(acetonitrile)dichloropalladium(II) to form the bis(Triphenylphosphine)iminium hexachloropalladate (2). In the solid phase, [PNP]+ causes the absence of strong supramolecular interactions, which highlights the peculiar behavior of the cation in the crystal packing of its solid phases
Hossein Mahdavi - One of the best experts on this subject based on the ideXlab platform.
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staudinger aza wittig reactions utilizing a novel linear polymer supported Triphenylphosphine as a modified liquid phase reagent
Tetrahedron Letters, 2009Co-Authors: Hossein Mahdavi, Javad AmaniAbstract:A new Triphenylphosphine reagent linked to a linear maleimide-styrene copolymer is synthesized and is found to be effective for the formation of a variety of imines via the Staudinger/aza-Wittig reaction. This linear polymer-supported Triphenylphosphine has a unique solubility behavior and provides for a simple means of purifying the desired imine from the phosphine oxide by-product. The reactivity of this polymeric reagent is superior to that of the cross-linked polymer-supported phosphine reagent.
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Triphenylphosphine oxide supported on non cross linked maleimide styrene copolymer application as a novel hendrickson reagent
Tetrahedron Letters, 2008Co-Authors: Hossein Mahdavi, Javad AmaniAbstract:Abstract A new Triphenylphosphine oxide reagent linked to a linear maleimide–styrene copolymer is synthesized. This phosphine-bound copolymer is converted to copolymer-supported Triphenylphosphine ditriflate as a novel Hendrickson reagent by treatment with triflic anhydride. This reacts rapidly in various dehydration reactions such as anhydride, ester and amide formation. This linear and soluble support is also easily recovered and recycled several times without loss of efficiency.
Bo Fang - One of the best experts on this subject based on the ideXlab platform.
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Table_1_Versatile Dibenzothio[seleno]phenes via Hexadehydro-Diels–Alder Domino Cyclization.DOC
2019Co-Authors: Baohua Liu, Yinshan Wen, Bo FangAbstract:A facile strategy to synthesize highly substituted dibenzoselenophenes and dibenzothiophenes by a domino hexadehydro-Diels–Alder reaction is reported in this article. The formation of three new C–C bonds, one new Caryl–Se/Caryl–S bond, and C–H σ-bond migration via one-pot multiterminal cycloaddition reactions were involved in over three transformations. The target tetracyclic compounds were prepared from tetraynes with a Triphenylphosphine selenide or Triphenylphosphine sulfide. This reaction played a pivotal role in constructing natural thio[seleno]phene cores, which were highly substituted, and is a robust method for producing fused heterocycles.
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Data_Sheet_7_Versatile Dibenzothio[seleno]phenes via Hexadehydro-Diels–Alder Domino Cyclization.CDX
2019Co-Authors: Baohua Liu, Yinshan Wen, Bo FangAbstract:A facile strategy to synthesize highly substituted dibenzoselenophenes and dibenzothiophenes by a domino hexadehydro-Diels–Alder reaction is reported in this article. The formation of three new C–C bonds, one new Caryl–Se/Caryl–S bond, and C–H σ-bond migration via one-pot multiterminal cycloaddition reactions were involved in over three transformations. The target tetracyclic compounds were prepared from tetraynes with a Triphenylphosphine selenide or Triphenylphosphine sulfide. This reaction played a pivotal role in constructing natural thio[seleno]phene cores, which were highly substituted, and is a robust method for producing fused heterocycles.
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Data_Sheet_10_Versatile Dibenzothio[seleno]phenes via Hexadehydro-Diels–Alder Domino Cyclization.PDF
2019Co-Authors: Baohua Liu, Yinshan Wen, Bo FangAbstract:A facile strategy to synthesize highly substituted dibenzoselenophenes and dibenzothiophenes by a domino hexadehydro-Diels–Alder reaction is reported in this article. The formation of three new C–C bonds, one new Caryl–Se/Caryl–S bond, and C–H σ-bond migration via one-pot multiterminal cycloaddition reactions were involved in over three transformations. The target tetracyclic compounds were prepared from tetraynes with a Triphenylphosphine selenide or Triphenylphosphine sulfide. This reaction played a pivotal role in constructing natural thio[seleno]phene cores, which were highly substituted, and is a robust method for producing fused heterocycles.
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Versatile Dibenzothio[seleno]phenes via Hexadehydro-Diels–Alder Domino Cyclization
Frontiers Media S.A., 2019Co-Authors: Baohua Liu, Yinshan Wen, Bo FangAbstract:A facile strategy to synthesize highly substituted dibenzoselenophenes and dibenzothiophenes by a domino hexadehydro-Diels–Alder reaction is reported in this article. The formation of three new C–C bonds, one new Caryl–Se/Caryl–S bond, and C–H σ-bond migration via one-pot multiterminal cycloaddition reactions were involved in over three transformations. The target tetracyclic compounds were prepared from tetraynes with a Triphenylphosphine selenide or Triphenylphosphine sulfide. This reaction played a pivotal role in constructing natural thio[seleno]phene cores, which were highly substituted, and is a robust method for producing fused heterocycles
