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HEXAHYDRO-1,3,2-DIAZAPHOSPHORINES. VIII. SYNTHESIS, AND CHEMICAL REACTIONS OF 1,3-DIALKYL(ARYL)-1,2,3,4-TETRAHYDRO-1,3,2-BENZODIAZAPHOSPHORINES

1,3-Disubstituted 1,2,3,4-tetrahydro-1,3,2-benzodiazaphosphorines were synthesized, and their chemical properties were studied.By 1H, 13C, and 31P NMR spectroscopy it was shown that the compounds obtained exist in solution predominantly in one conformation with an axial orientation of the substituent on the phosphorus atom.The molecular structure of 2-ethoxy-1,2,3,4-tetrahydro-1-isopropyl-3-phenyl-1,3,2-benzodiazaphosphorine 2-sulfide was proved by means of x-ray structure analysis.

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Reference:
Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate

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IONIC LIQUID CONTAINING PHOSPHONIUM ION AND METHOD FOR PRODUCING SAME

An ionic liquid of the present invention is “an ionic liquid comprising an organic substance represented by the following general formula (1) as a cation component” and “an ionic liquid comprising a cation component and an anion component, and the cation component is one or plural kinds selected from the group consisting of cation components represented by the following formula (1)”.

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Reference:
Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate

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In an article, published in an article, once mentioned the application of 1608-26-0, Name is Tris(dimethylamino)phosphine
,molecular formula is P[N(CH3)2]3, is a conventional compound. this article was the specific content is as follows.HPLC of Formula: P[N(CH3)2]3

THIOCARBONYL ANIONS: PREPARATION AND REACTIONS OF CpW(CO)2CS- AND HB(pz)3W(CO)2CS-

The anionic thiocarbonyl complexes CpW(CO)2CS- and HB(pz)3W(CO)2CS- may be prepared by reaction of trans-IW(CO)4CS- with NaC5H5 or potassium hydrotris(1-pyrazolyl)borate.The nucleophilic CpW(CO)2CS- reacts with ClSnPh3, ClPbPh3, HgI2 and BrSePh to give cis-CpW(CO)2(CS)SnPh3, cis-CpW(CO)2(CS)PbPh3, cis- and trans-CpW(CO)2(CS)HgI, and cis- and trans-CpW(CO)2(CS)SePh, respectively.Both CpW(CO)2CS- and HB(pz)3W(CO)2CS- react with I2 to yield the iodo complexes, trans-CpW(CO)2(CS)I and trans-HB(pz)3W(CO)2(CS)I.Refluxing trans-CpW(CO)2(CS)I with PMe2Ph, PPh3, P(OPh)3, P(NMe2)3, or CNMe in toluene results in substitution of CO and yields the complexes CpW(CO)(CS)(L)I in which the CS group is trans to the iodide.At lower temperatures trans-CpW(CO)2(CS)I reacts with PMe2Ph to give the ionic product I.Proposed structures for all of the complexes are based upon their IR, 1H NMR, and 13C NMR spectra.

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Reference:
Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate

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, molecular formula is P[N(CH3)2]3, belongs to chiral-phosphine-ligands compound, is a common compound. In a patnet, once mentioned the new application about 1608-26-0, COA of Formula: P[N(CH3)2]3

Comparison of catalytic activity of hexamethyltriamino- and tri-n-butylphosphines in the Pudovik reaction

The catalytic activity of hexamethyltriaminophosphine in the P(O)?H bond addition to electron-deficient alkenes was studied. Depending on the nature of the alkene, hexamethyltriaminophosphine produces better or lower yields of the reaction products compared to tri-n-butylphosphine.

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Reference:
Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate

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In an article, published in an article, once mentioned the application of 1608-26-0, Name is Tris(dimethylamino)phosphine
,molecular formula is P[N(CH3)2]3, is a conventional compound. this article was the specific content is as follows.COA of Formula: P[N(CH3)2]3

SYNTHESE UND SPEKTROSKOPISCHE CHARAKTERISIERUNG VON CYCLOPENTADIENYLEISEN-KOMPLEXEN MIT P-N-LIGANDEN DES TYPS (C6H5)3-nP(NR2)N (n = 0-3; R = CH3, C2H5)

The complex cations BF4 (L = (C6H5)3-nP(NR2)n; n = 0-3; R = CH3, C2H5) have been obtained from the reaction of BF4 (I) with L.The reaction of I with E(NR2)3 (E = As, Sb; R = CH3) is also described.Spectroscopic investigations (IR, 1H, 13C and 31P NMR) indicate an increase in electron density on the iron center through increase of the number of P-bound NR2 groups.

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Reference:
Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate

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In an article, published in an article, once mentioned the application of 1608-26-0, Name is Tris(dimethylamino)phosphine
,molecular formula is P[N(CH3)2]3, is a conventional compound. this article was the specific content is as follows.category: chiral-phosphine-ligands

Pre-organized oligofunctional ligands based on rctt-C-naphthyl-resorcinarene: Synthesis and complex formation

Synthesis of pre-organized oligofunctional ligands based on ortho-methyl-tetra-C-naphthyl-resorcinarene existing in the chair conformation was carried out. By selective modification derivatives differing in the nature of functional groups immobilized on the horizontal and vertical benzene rings of resorcinarene skeleton were obtained. The abilities of the synthesized compounds to form complexes with d-, f-elements and organic amines were considered.

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Reference:
Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate

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, molecular formula is P[N(CH3)2]3. In a patent, introducing its new discovery.

Synthesis of N-Acyl-, N-Sulfonyl-, and N-Phosphinylphospha-lambda5-azenes by a Redox-Condensation Reaction Using Amides, Triphenylphosphine, and Diethyl Azodicarboxylate

The reaction of phosphines and amides with diethyl azodicarboxylate (DAD) produced phospha-lambda5-azenes.Thus aromatic amides and those aliphathic amides with electron-withdrawing substituents gave N-acyl-P,P,P-triphenylphospha-lambda5-azenes (5) when triphenylphosphine (TPP) was employed.Both aryl- and alkylsulfonamides reacted with TPP and DAD to produce the N-sulfonylphospha-lambda5-azenes (9).Diphenylphosphinamide (10) and ethyl carbamate (12) also produced the respective phosphazenes (11 and 13) with TPP and DAD.Secondary carboxamides and sulfonamides did not react with TPP and DAD.The reaction of triethyl phosphite with sulfonamides in the presence of DAD produced the phosphorimidates (20) in an analogous reaction, along with the corresponding N,N-diethylsulfonamides and the deethylated adduct of triethyl phosphite and DAD (23).Triethyl phosphite-DAD failed, however, to give a phosphorimidate with carboxamides but gave, instead, the rearranged adduct of DAD and triethyl phosphite (19).Tris(dimethylamino)phosphine reacted with sulfonamides and DAD but the products were the corresponding ethyl N-sulfonylcarbamates (26) rather than the phosphazenes.Tris(dimethylamino)phosphine reacted with azodicarbonamide (a molecule which contains both the azo and carboxamide groups) with the production of N,N-dimethylurea, again without formation of the phosphazene.Finally, the reaction of triphenylarsine with benzenesulfonamide and DAD produced N-(phenylsulfonyl)triphenylarsa-lambda5-azene (30) but triphenylstibene with DAD and benzenesulfonamide only gave triphenylstibene oxide.Mechanistic possibilities for these reactions are also discussed.

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Reference:
Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate

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Ylide-Carbene Chemistry. Synthesis of 1,1-Difluoro-1-alkenes

The reaction between nonstabilized alkylidenetriphenylphosphoranes and chlorodifluoromethane has been found to be a useful alternative to the Wittig reaction for the synthesis of many difluoromethylene olefins.Both primary and secondary ylides which do not contain strongly electron-withdrawing substituents within the alkylidene portion of the ylide react with chlorodifluoromethane to give the corresponding difluoromethylene olefins in yields which are significantly better than those obtained by the Wittig reaction.The formation of triphenylphosphine oxide is avoided, and all phosphorus-containing moieties can be recovered and recycled.The reaction proceeds by initial dehydrochlorination of chlorodifluoromethane by the ylide to generate difluorocarbene.The intermediate difluorocarbene is then trapped by a second equivalent of the nucleophilic ylide.Mechanistic evidence indicates that either a zwitterionic intermediate or a three-membered cyclic phosphorane can account for the 1,1-difluoro-1-alkene products.The isolation of several 1-hydro-1-fluoro-1-alkene products such as FCH=CHPh, FHC=CPh2, and FHC=CHCH=CHPh after steam distillation of the reaction mixtures, however, can only be accounted for via a three-membered cyclic phosphorane.

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Reference:
Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate

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In an article, published in an article, once mentioned the application of 1608-26-0, Name is Tris(dimethylamino)phosphine
,molecular formula is P[N(CH3)2]3, is a conventional compound. this article was the specific content is as follows.COA of Formula: P[N(CH3)2]3

New chiral organophosphorus derivatizing agent for the determination of enantiomeric composition of chloro- and bromohydrins by 31P NMR spectroscopy

The synthesis of a new chiral organophosphorus derivatizing agent prepared from (S)-2-anilinomethylpyrrolidine 1 and its successful use in the determination of enantiomeric composition of various halohydrins by 31P NMR spectroscopy is described. (C) 2000 Elsevier Science Ltd.

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Reference:
Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate

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Molecular structures and reactivity of trifluoromethyltris(dialkylamino)phosphonium bromides

Hexa-alkylphosphorus triamides and trifluoromethyl bromide react to give trifluoromethyltris(dialkylamino)phosphonium bromides which were used for the trifluoromethylation of benzaldehyde and copper(I) iodide in the presence of fluoride anions with different counterions; tris(diethylamino)difluorophosphorane proved to be a masked fluoride anion donor.The structures of (1+)Br(1-) and (1+)Br(1-) have been determined by single-crystal X-ray investigations and shown to exhibit a distorted tetrahedral bond configuration with a rather long (F3)C-P bond of 1.866(9) or 1.896(6) Angstroem, respectively. – Keywords: Molecular structures; Reactivity; Trifluoromethyltris(dialkylamino)phosphonium bromides; Single-crystal X-ray determination; NMR spectroscopy

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Reference:
Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate