Month: April 2022

Most of the natural products isolated at present are heterocyclic compounds, so heterocyclic compounds occupy an important position in the research of organic chemistry. A compound: 3411-48-1, is researched, SMILESS is C1=CC2=C(C=C1)C(=CC=C2)P(C1=CC=CC2=C1C=CC=C2)C1=CC=CC2=C1C=CC=C2, Molecular C30H21PJournal, Article, Research Support, Non-U.S. Gov’t, Organic Letters called Regioselective trans-Carboboration of Propargyl Alcohols, Author is Jin, Hongming; Fuerstner, Alois, the main research direction is regioselective trans carboboration propargyl alc; crystal mol structure dioxaborolanyl butenol hexenol boracycle.Name: Tri(naphthalen-1-yl)phosphine.

Proper choice of the base allowed trans-diboration of propargyl alcs. with B2(pin)2 to evolve into an exquisitely regioselective procedure for net trans-carboboration. The method is modular as to the newly introduced carbon substituent (aryl, Me, allyl, benzyl, alkynyl), which is invariably placed distal to the -OH group.

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Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: 5-(4-Pyridyl)-1H-tetrazole( cas:14389-12-9 ) is researched.Computed Properties of C6H5N5.Song, Wei-Chao; Pan, Qinhe; Song, Peng-Chao; Zhao, Qiang; Zeng, Yong-Fei; Hu, Tong-Liang; Bu, Xian-He published the article 《Two unprecedented 10-connected bct topological metal-organic frameworks constructed from cadmium clusters》 about this compound( cas:14389-12-9 ) in Chemical Communications (Cambridge, United Kingdom). Keywords: unprecedented ten connected bct organic framework cadmium cluster preparation; cadmium isophthalic acid pyridyl tetrazole metal organic framework preparation; crystal mol structure cadmium isophthalic acid pyridyl tetrazole cluster. Let’s learn more about this compound (cas:14389-12-9).

By simply modifying the expansion of ligand tether length, two Cd(ii) metal-organic frameworks have been constructed from linear tetranuclear and trinuclear cadmium clusters, resp., which present an unprecedented 10-connected unimodal bct net.

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Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

Formula: C26H24P2. Aromatic heterocyclic compounds can also be classified according to the number of heteroatoms contained in the heterocycle: single heteroatom, two heteroatoms, three heteroatoms and four heteroatoms. Compound: 1,2-Bis(diphenylphosphino)ethane, is researched, Molecular C26H24P2, CAS is 1663-45-2, about Synthesis of ruthenium-dithiocarbamate chelates bearing diphosphine ligands and their use as latent initiators for atom transfer radical additions. Author is Aldin, Mohammed Zain; Zaragoza, Guillermo; Delaude, Lionel.

Nine representative [Ru(S2CNEt2)2(diphos)] complexes were prepared in almost quant. yields (91-97%) from [RuCl2(p-cymene)]2, Na diethyldithiocarbamate trihydrate, and a diphosphine (dppm, dppe, dppp, dppb, dpppe, dppen, dppbz, dppf, or DPEphos), using a novel, straightforward, 1-pot procedure. The recourse to a monomodal microwave reactor was instrumental in reaching the thermodn. equilibrium favoring the targeted monometallic trichelates. All the products were fully characterized by using various anal. techniques and the mol. structures of seven of them were determined by x-ray crystallog. NMR, XRD, and IR spectroscopies evidenced a significant contribution of the thioureide resonance form Et2N+:CS2-2 to the electronic structure of the 1,1-dithiolate ligand. MS/MS spectrometry showed the formation of phosphine-free [Ru(S2CNEt2)2]+ cations in the gas phase, except when starting from [Ru(S2CNEt2)2(dppbz)]. The activity of the nine complexes was probed in three different catalytic processes, viz., the cyclopropanation of styrene with Et diazoacetate, the synthesis of vinyl esters from HOBz and 1-hexyne, and the atom transfer radical addition (ATRA) of CCl4 and Me methacrylate. In the 1st two reactions, the saturated trichelates were poorly efficient. This was most likely due to their high stability, which prevented the formation of coordinatively unsaturated species. Contrastingly, with a turnover number of 2000 and an initial turnover frequency of 2080 h-1 for a 0.05 mol% catalyst loading, the [Ru(S2CNEt2)2(dppm)] complex emerged as a very robust, latent ATRA initiator, whose activity matched or outperformed those displayed by the most efficient Ru catalysts described so far.

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Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called Synthesis of aryl sulfonyl fluorides from aryl sulfonyl chlorides using sulfuryl fluoride (SO2F2) as fluoride provider, published in , which mentions a compound: 6684-39-5, Name is 2-Chloro-5-pyridinesulfonyl chloride, Molecular C5H3Cl2NO2S, Quality Control of 2-Chloro-5-pyridinesulfonyl chloride.

A highly efficient method for the synthesis of aryl sulfonyl fluorides ArSO2F [Ar = 4-MeC6H4, 4-PhC6H4, 4-ClC6H4, etc.] was developed from aryl sulfonyl chlorides using SO2F2 as fluoride source in up to 98% isolated yield under mild conditions. Gram scale experiments were also conducted, revealing the good practicality of this new protocol.

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Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

Epoxy compounds usually have stronger nucleophilic ability, because the alkyl group on the oxygen atom makes the bond angle smaller, which makes the lone pair of electrons react more dissimilarly with the electron-deficient system. Compound: Tri(naphthalen-1-yl)phosphine, is researched, Molecular C30H21P, CAS is 3411-48-1, about Complexes of gold(I) and platinum(II) with polyaromatic phosphine ligands.Synthetic Route of C30H21P.

Au and Pt(II) complexes of the phosphine ligands PArnPh3-n (Ar = naphthyl, anthracenyl, ferrocenyl and other polyaromatic groups) were synthesized. The electron donating abilities of naphthyl and anthracenyl phosphine ligands was explored using gas phase photoelectron spectral data on the parent phosphines and their relative complexing ability to Pt precursor mols. was assessed by synthetic studies and NMR experiments Their steric parameters were estimated by the Tolman cone angle methodol. using x-ray crystallog. data. The mol. structures of the Au complexes [AuCl(PAn2Ph)]·CHCl3 and [Au(PFc2Ph)2]·CHCl3 were determined

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Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Article, Chemical Communications (Cambridge, United Kingdom) called An arene-stabilized η5-pentamethylcyclopentadienyl antimony dication acts as a source of Sb+ or Sb3+ cations, Author is Zhou, Jiliang; Kim, Hyehwang; Liu, Liu Leo; Cao, Levy L.; Stephan, Douglas W., which mentions a compound: 1663-45-2, SMILESS is P(CCP(C1=CC=CC=C1)C2=CC=CC=C2)(C3=CC=CC=C3)C4=CC=CC=C4, Molecular C26H24P2, Reference of 1,2-Bis(diphenylphosphino)ethane.

Double chloride abstraction from Cp*SbCl2 (Cp* = pentamethylcyclopentadienyl) affords an arene-stabilized η5-Cp*-bound antimony dicationic compound [(η5-Cp*)Sb(tol)][B(C6F5)4]2 (1) (tol = toluene), which exhibits strong Lewis acidity, abstracting chloride from Ph3CCl. 1 Reacts with different Lewis bases via divergent pathways, giving rise to release of either Sb+ or Sb3+ cations.

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Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

Al-Jibori, Subhi A.; Al-Doori, Luma A.; Al-Janabi, Ahmed S. M.; Alheety, Mustafa A.; Wagner, Christoph; Karadag, Ahmet published the article 《Mercury(II) mixed ligand complexes of phosphines or amines with 2-cyanoamino thiophenolate ligands formed via monodeprotonation and carbon-sulfur bond cleavage of 2-aminobenzothiazole. X-ray crystal structures of [Hg(SC6H4NCN)(PPh3)]2 and [Hg(SC6H4NCN)(Ph2PCH2PPh2)]2》. Keywords: mercury phosphine amine cyanoaminothiophenolate complex preparation crystal structure.They researched the compound: 1,2-Bis(diphenylphosphino)ethane( cas:1663-45-2 ).Formula: C26H24P2. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:1663-45-2) here.

The addition of sodium hydroxide to a mixture of Ph mercury acetate and 2-aminobenzothiazole in warm ethanol led to the high yield (84%) formation of [Ph-Hg(LH)]n (1), LH = the 2-cyanoaminothiaphenolate anion (SC6H4NHC[n.58118]N)-, resulting from monodeprotonation of 2-aminobenzothiazole and facile carbon-sulfur bond breakage. Reaction of 1 with Ph3P or Ph3PS afforded [Hg(LH)2(Ph3P)2] (2) or [PhHg(μ-LH)(Ph3PS)]2 (3), resp. Recrystallization of 2 from warm DMSO afforded [Hg(μ-L)(PPh3)]2 (4), L = the 2-cyanoaminothiophenolate di-anion (SC6H4NC[n.58118]N)2-, which was characterized by an x-ray diffraction study. Treatment of 1 with the diphosphines Ph2P(CH2)nPPh2, 2,6-diaminopyridine (dapy), ethylenediamine (en) or 1,10-phenanthroline (phen) afforded [PhHg(LH){ Ph2P(CH2)nPPh2}], {n = 1 dppm (5), n = 2 dppe (6), n = 3 dppp (7), n = 4 dppb (8), (CH2)n = (Cp)2Fe dppf (9)}, [PhHg(LH)(dapy)2] (11), [PhHg(LH)(en)] (12) or [PhHg(LH)(phen)] (13). Recrystallization of 5 from CH2Cl2 afforded binuclear [Hg(μ-L)(η1-dppm)]2.CH2Cl2 (10), which was characterized by an x-ray diffraction study.

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Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Zeitschrift fuer Anorganische und Allgemeine Chemie called Direct Synthesis and Characterization of New Copper(II) and Zinc(II) 5-R-Tetrazolato Complexes [R = Me, Ph, 4-Py] with Ethylenediamine and DMSO as Coligands, Author is Mosalkova, Anastasiya P.; Voitekhovich, Sergei V.; Lyakhov, Alexander S.; Ivashkevich, Ludmila S.; Gaponik, Pavel N.; Ivashkevich, Oleg A., which mentions a compound: 14389-12-9, SMILESS is C1(C2=NN=NN2)=CC=NC=C1, Molecular C6H5N5, Application In Synthesis of 5-(4-Pyridyl)-1H-tetrazole.

Three novel 5-R-tetrazolato complexes (R = Me, Ph, 4-Py), [Zn2(MeCN4)4(DMSO)2]n (1), [Cu2(PhCN4)4(en)2]·2DMSO (2), and {[Cu(4-PyCN4)2(DMSO)2]·4DMSO}n (3), were isolated as unexpected products under attempts to prepare heterometallic tetrazolates using a direct synthesis strategy in the Cu0-ZnO-en-RCN4H-DMSO system (en = ethylenediamine). The prepared compounds were characterized by elemental, single-crystal x-ray, and thermal analyses, and IR spectroscopy. Variation of the 5-substituent of the tetrazole ring causes different composition of complexes 1-3 and diverse coordination modes of 5-R-tetrazolato ligands. Complex 1 is a 3-dimensional coordination polymer due to N1,N4-bridging of 5-methyltetrazolato anions. Complex 2, with en as a coligand, has a dinuclear structure with two copper atoms linked together by two 5-phenyltetrazolato ligands by tetrazole N2,N3 bridges. Complex 3 represents a 2-dimensional coordination polymer, formed due to 5-(4-pyridyl)tetrazolato bridges between adjacent copper atoms (with the tetrazole and pyridine rings nitrogen atoms as coordination centers). DMSO mols., included in all the compounds, are solvate and/or coordinated ones.

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Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: 1,2-Bis(diphenylphosphino)ethane, is researched, Molecular C26H24P2, CAS is 1663-45-2, about Synthesis and characterisation of a range of Fe, Co, Ru and Rh triphos complexes and investigations into the catalytic hydrogenation of levulinic acid, the main research direction is hydrogenation catalyst ruthenium rhodium triphos complex; crystal structure iron cobalt ruthenium rhodium triphos complex; mol structure iron cobalt ruthenium rhodium triphos complex; triphos ligand preparation reaction iron cobalt ruthenium rhodium halide.Product Details of 1663-45-2.

The coordination chem. of the N-triphos ligand (NPPh3, 1b) was studied with a range of Fe, Co and Rh precursors and found to form either tridentate or bidentate complexes. Reaction of NPPh3 with [Rh(COD)(MeCN)2]BF4 gave the tridentate complex [Rh(COD)(κ3-NPPh3)]BF4 (3) in the solid state, however, in solution a bidentate complex predominates in more polar solvents. Reaction of NPPh3 with Fe carbonyl precursors revealed the formation of the bidentate complexes [Fe(CO)3(κ1,κ2-NPPh3)Fe(CO)4] (4) and [Fe(CO)3(κ2-NPPh3)] (5), while reaction with FeBr2 resulted in the paramagnetic bidentate complex [Fe(Br)2(κ2-NPPh3)] (6). Reaction of NPPh3 with CoCl2 gave a dimeric Co species [(κ2-NPPh3)CoCl(κ1,κ2-NPPh3)CoCl3] (7), while Zn powder reduction of NPPh3 Co halides gave the tridentate complexes of the type: [Co(X)(κ3-NPPh3)]. The related triphos Ru complex, [Ru(CO3)(CO)(κ3-CPPh3)] (2), also was isolated and characterized. Preliminary catalytic hydrogenation of levulinic acid (LA) was conducted with 2 and 3. The Ru complex is catalytically active, giving high conversions of LA to form gamma-valerolactone (GVL) and 1,4-pentanediol (1,4-PDO), while 3 is catalytically inactive. In situ catalytic testing with 1b and Fe(BF4)2.6H2O resulted in low conversions of LA while a combination of 1b and Co(BF4)2.6H2O gave high conversions to GVL.

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Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis

The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Synthesis of phosphoörganic aromatic compounds with lithium reagents》. Authors are Mikhailov, B. M.; Kucherova, N. F..The article about the compound:Tri(naphthalen-1-yl)phosphinecas:3411-48-1,SMILESS:C1=CC2=C(C=C1)C(=CC=C2)P(C1=CC=CC2=C1C=CC=C2)C1=CC=CC2=C1C=CC=C2).Product Details of 3411-48-1. Through the article, more information about this compound (cas:3411-48-1) is conveyed.

Anthracene does not react with PCl3 in the presence of AlCl3, while PCl5 leads only to Cl derivatives Aryl Li derivatives with P halides in Et2O readily gave P derivatives Thus 3 PhLi and PCl3 gave 61% Ph3P; 1-C10H7Li gave 27% (1-C10H7)3P, m. 278-80°, while 9-phenanthryllithium gave 72% tri-9-phenanthrylphosphine, m. 374-6° (from MePh); 9-anthryllithium gave 20% tri-9-anthrylphosphine, orange-red, m. 270-3°, while 9-bromo-10-anthryllithium gave yellow tris(9-bromo-10-anthryl)phosphine, m. 206-8° (from MePh). Similarly, the Li derivative from 10-bromo-1,2-benzanthracene gave 54.6% tris-(1,2-benzanthr-10-yl)phosphine, yellow, m. 192-4°. POCl3 in Et2O similarly gave 65% Ph3PO, 38% (1-C10H7)3PO, 49% tri-9-phenanthrylphosphine oxide, m. 354-6°, 65% tris-(1,2-benzanthr-10-yl)phosphine oxide, m. 191-3° (from Et2O-benzene); alteration of the proportions of the reagents failed to yield products other than R3PO. Use of C5H10NPOCl2, followed by hydrolysis, gave 64% Ph2PO2H, m. 192-4°, 51% (1-C10H7)2PO2H, m. 198-200°; 9-phenanthryllithium (2 moles/mole chloride) gave 2 acids, 9-phenanthrenephosphonic acid, m. 228-9°, and di-9-phenanthrylphosphinic, acid, giving insoluble Na salt, in 33% and 47% yield, resp.

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Reference:
Chiral nitrogen ligands in late transition metal-catalysed asymmetric synthesis—I. Addressing the problem of ligand lability in rhodium-catalysed hydrosilations,
Nitrogen-Containing Ligands for Asymmetric Homogeneous and Heterogeneous Catalysis