The Experts below are selected from a list of 180 Experts worldwide ranked by ideXlab platform
S P Petrosyants - One of the best experts on this subject based on the ideXlab platform.
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mixed halo Hexamethylphosphoramide complexes of indium iii 115in 31p 19f and 1h nmr studies of indium iii species in Hexamethylphosphoramide solution x ray structure of trans diiodotetrakis Hexamethylphosphoramide indium iii iodide
Polyhedron, 1993Co-Authors: M A Malyarick, A B Ilyuhin, S P PetrosyantsAbstract:Abstract 115 In NMR studies are reported for InX 3 (X = Cl, Br, I) solutions in Hexamethylphosphoramide (HMPA). The resonances of InX − 4 anions are observed for tribromide and triiodide solutions. Mixed InBr 4- n I − n anions may be obtained for the mixtures of InI 3 and InBr 3 . A trigonal-bipyramidal complex, InCl 3 (HMPA) 2 , is formed from InCl 3 -HMPA solutions. Diiodotetrakis(Hexamethylphosphoramide)indium(III) iodide has been prepared from an InI 3 -HMPA system and fully characterized by elemental analysis, IR and NMR spectroscopy and X-ray crystallography. The cation is trans -octahedral. 19 F NMR spectra of In(NO 3 ) 3 -F − -HMPA systems demonstrate the formation of six-coordinate mixed InF n (HMPA) m (H 2 O) 3− n 6− n−m species.
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Mixed halo/Hexamethylphosphoramide complexes of indium(III). 115In, 31P, 19F and 1H NMR studies of indium(III) species in Hexamethylphosphoramide solution. X-ray structure of trans-diiodotetrakis(Hexamethylphosphoramide)indium(III) iodide
Polyhedron, 1993Co-Authors: M A Malyarick, A B Ilyuhin, S P PetrosyantsAbstract:Abstract 115 In NMR studies are reported for InX 3 (X = Cl, Br, I) solutions in Hexamethylphosphoramide (HMPA). The resonances of InX − 4 anions are observed for tribromide and triiodide solutions. Mixed InBr 4- n I − n anions may be obtained for the mixtures of InI 3 and InBr 3 . A trigonal-bipyramidal complex, InCl 3 (HMPA) 2 , is formed from InCl 3 -HMPA solutions. Diiodotetrakis(Hexamethylphosphoramide)indium(III) iodide has been prepared from an InI 3 -HMPA system and fully characterized by elemental analysis, IR and NMR spectroscopy and X-ray crystallography. The cation is trans -octahedral. 19 F NMR spectra of In(NO 3 ) 3 -F − -HMPA systems demonstrate the formation of six-coordinate mixed InF n (HMPA) m (H 2 O) 3− n 6− n−m species.
M A Malyarick - One of the best experts on this subject based on the ideXlab platform.
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mixed halo Hexamethylphosphoramide complexes of indium iii 115in 31p 19f and 1h nmr studies of indium iii species in Hexamethylphosphoramide solution x ray structure of trans diiodotetrakis Hexamethylphosphoramide indium iii iodide
Polyhedron, 1993Co-Authors: M A Malyarick, A B Ilyuhin, S P PetrosyantsAbstract:Abstract 115 In NMR studies are reported for InX 3 (X = Cl, Br, I) solutions in Hexamethylphosphoramide (HMPA). The resonances of InX − 4 anions are observed for tribromide and triiodide solutions. Mixed InBr 4- n I − n anions may be obtained for the mixtures of InI 3 and InBr 3 . A trigonal-bipyramidal complex, InCl 3 (HMPA) 2 , is formed from InCl 3 -HMPA solutions. Diiodotetrakis(Hexamethylphosphoramide)indium(III) iodide has been prepared from an InI 3 -HMPA system and fully characterized by elemental analysis, IR and NMR spectroscopy and X-ray crystallography. The cation is trans -octahedral. 19 F NMR spectra of In(NO 3 ) 3 -F − -HMPA systems demonstrate the formation of six-coordinate mixed InF n (HMPA) m (H 2 O) 3− n 6− n−m species.
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Mixed halo/Hexamethylphosphoramide complexes of indium(III). 115In, 31P, 19F and 1H NMR studies of indium(III) species in Hexamethylphosphoramide solution. X-ray structure of trans-diiodotetrakis(Hexamethylphosphoramide)indium(III) iodide
Polyhedron, 1993Co-Authors: M A Malyarick, A B Ilyuhin, S P PetrosyantsAbstract:Abstract 115 In NMR studies are reported for InX 3 (X = Cl, Br, I) solutions in Hexamethylphosphoramide (HMPA). The resonances of InX − 4 anions are observed for tribromide and triiodide solutions. Mixed InBr 4- n I − n anions may be obtained for the mixtures of InI 3 and InBr 3 . A trigonal-bipyramidal complex, InCl 3 (HMPA) 2 , is formed from InCl 3 -HMPA solutions. Diiodotetrakis(Hexamethylphosphoramide)indium(III) iodide has been prepared from an InI 3 -HMPA system and fully characterized by elemental analysis, IR and NMR spectroscopy and X-ray crystallography. The cation is trans -octahedral. 19 F NMR spectra of In(NO 3 ) 3 -F − -HMPA systems demonstrate the formation of six-coordinate mixed InF n (HMPA) m (H 2 O) 3− n 6− n−m species.
Jimmin Fang - One of the best experts on this subject based on the ideXlab platform.
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phenyl carbonyl coupling reactions promoted by samarium diiodide and Hexamethylphosphoramide
Journal of Organic Chemistry, 1997Co-Authors: Jiannshyng Shiue, Jimmin FangAbstract:By mediation of samarium diiodide and Hexamethylphosphoramide, benzaldehydes and acetophenones underwent self- and cross-couplings to give the products having linkages at the para-carbons of phenyl rings and the carbonyl groups. The phenyl−carbonyl coupling of 2,5-dimethoxybenzaldehyde generated a Sm(III)−enolate intermediate, which was trapped by alkyl halides in a stereospecific manner to give uncommon 1,4-dialkyl-2,5-cyclohexadiene-1-carboxaldehydes. The benzaldehydes bearing tethered carbonyl chains proceeded with intramolecular phenyl−carbonyl couplings to afford fused benzocycles.
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Phenyl−Carbonyl Coupling Reactions Promoted by Samarium Diiodide and Hexamethylphosphoramide
Journal of Organic Chemistry, 1997Co-Authors: Jiannshyng Shiue, Jimmin FangAbstract:By mediation of samarium diiodide and Hexamethylphosphoramide, benzaldehydes and acetophenones underwent self- and cross-couplings to give the products having linkages at the para-carbons of phenyl rings and the carbonyl groups. The phenyl−carbonyl coupling of 2,5-dimethoxybenzaldehyde generated a Sm(III)−enolate intermediate, which was trapped by alkyl halides in a stereospecific manner to give uncommon 1,4-dialkyl-2,5-cyclohexadiene-1-carboxaldehydes. The benzaldehydes bearing tethered carbonyl chains proceeded with intramolecular phenyl−carbonyl couplings to afford fused benzocycles.
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reductive double electrophilic reactions of methyl thiophenecarboxylate mediated by samarium diiodide and Hexamethylphosphoramide
Tetrahedron Letters, 1997Co-Authors: Shyhming Yang, Jimmin FangAbstract:Abstract The pentadienyl anion generated by treating methyl thiophenecarboxylate with samarium diiodide/ Hexamethylphosphoramide in tetrahydrofuran reacts at the C-5 position with a series of benzaldehydes and acetophenones to give the intermediates of samarium dienolates, which are trapped with the second electrophile, such as acetic anhydride, benzyl bromide and carbonyl compounds, in regioselective manners depending on the nature of the electrophile. Thus, the three-component reactions of methyl thiophenecarboxylate with carbonyl compounds are achieved in a one-pot procedure to give 4,5-disubstituted-4,5-dihydrothiophenecarboxylates.
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samarium diiodide Hexamethylphosphoramide promoted dimerization of benzaldehydes
Tetrahedron Letters, 1993Co-Authors: Jiannshyng Shiue, Jimmin FangAbstract:Abstract Benzaldehyde, its ortho - and meta -substituted derivatives and acetophenone underwent dimerization reactions on treatment with samarium(II) iodide in the presence of HMPA. Intramolecular phenyl-carbonyl coupling reactions were similarly carried out.
Lin Pu - One of the best experts on this subject based on the ideXlab platform.
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highly enantioselective alkyne additions to aldehydes in the presence of 1 1 bi 2 naphthol and Hexamethylphosphoramide
Proceedings of the National Academy of Sciences of the United States of America, 2004Co-Authors: Lin PuAbstract:It is found that the addition of Hexamethylphosphoramide to the solution of an alkyne, Et2Zn, and (S)-1,1′-bi-2-naphthol in methylene chloride allows the generation of an alkynylzinc at room temperature and shows highly enantioselective additions to aldehydes. The mild condition for the formation of the alkynylzinc reagent enables the use of functional alkynes in this asymmetric reaction with excellent enantioselectivity. It avoids the reflux of the toluene solutions of the alkynes and Et2Zn as previously reported.
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Highly enantioselective alkyne additions to aldehydes in the presence of 1,1′-bi-2-naphthol and Hexamethylphosphoramide
Proceedings of the National Academy of Sciences of the United States of America, 2004Co-Authors: Lin PuAbstract:It is found that the addition of Hexamethylphosphoramide to the solution of an alkyne, Et2Zn, and (S)-1,1′-bi-2-naphthol in methylene chloride allows the generation of an alkynylzinc at room temperature and shows highly enantioselective additions to aldehydes. The mild condition for the formation of the alkynylzinc reagent enables the use of functional alkynes in this asymmetric reaction with excellent enantioselectivity. It avoids the reflux of the toluene solutions of the alkynes and Et2Zn as previously reported.
A B Ilyuhin - One of the best experts on this subject based on the ideXlab platform.
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mixed halo Hexamethylphosphoramide complexes of indium iii 115in 31p 19f and 1h nmr studies of indium iii species in Hexamethylphosphoramide solution x ray structure of trans diiodotetrakis Hexamethylphosphoramide indium iii iodide
Polyhedron, 1993Co-Authors: M A Malyarick, A B Ilyuhin, S P PetrosyantsAbstract:Abstract 115 In NMR studies are reported for InX 3 (X = Cl, Br, I) solutions in Hexamethylphosphoramide (HMPA). The resonances of InX − 4 anions are observed for tribromide and triiodide solutions. Mixed InBr 4- n I − n anions may be obtained for the mixtures of InI 3 and InBr 3 . A trigonal-bipyramidal complex, InCl 3 (HMPA) 2 , is formed from InCl 3 -HMPA solutions. Diiodotetrakis(Hexamethylphosphoramide)indium(III) iodide has been prepared from an InI 3 -HMPA system and fully characterized by elemental analysis, IR and NMR spectroscopy and X-ray crystallography. The cation is trans -octahedral. 19 F NMR spectra of In(NO 3 ) 3 -F − -HMPA systems demonstrate the formation of six-coordinate mixed InF n (HMPA) m (H 2 O) 3− n 6− n−m species.
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Mixed halo/Hexamethylphosphoramide complexes of indium(III). 115In, 31P, 19F and 1H NMR studies of indium(III) species in Hexamethylphosphoramide solution. X-ray structure of trans-diiodotetrakis(Hexamethylphosphoramide)indium(III) iodide
Polyhedron, 1993Co-Authors: M A Malyarick, A B Ilyuhin, S P PetrosyantsAbstract:Abstract 115 In NMR studies are reported for InX 3 (X = Cl, Br, I) solutions in Hexamethylphosphoramide (HMPA). The resonances of InX − 4 anions are observed for tribromide and triiodide solutions. Mixed InBr 4- n I − n anions may be obtained for the mixtures of InI 3 and InBr 3 . A trigonal-bipyramidal complex, InCl 3 (HMPA) 2 , is formed from InCl 3 -HMPA solutions. Diiodotetrakis(Hexamethylphosphoramide)indium(III) iodide has been prepared from an InI 3 -HMPA system and fully characterized by elemental analysis, IR and NMR spectroscopy and X-ray crystallography. The cation is trans -octahedral. 19 F NMR spectra of In(NO 3 ) 3 -F − -HMPA systems demonstrate the formation of six-coordinate mixed InF n (HMPA) m (H 2 O) 3− n 6− n−m species.