Category: 29841-69-8

A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, Computed Properties of C14H16N2, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 29841-69-8, Name is (1S,2S)-(-)-1,2-Diphenylethylenediamine, molecular formula is C14H16N2. In a Article, authors is Selim, Khalid B.，once mentioned of 29841-69-8

Gamma rules: The title reaction was achieved in a highly regioselective manner using aryl Grignard reagents with monodentate chiral N-heterocyclic carbenel copper(I) catalyst to givediarylvinylmethanes with excellent enantiomeric excess in excellent yield (see scheme).

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Reference：
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

Application of 29841-69-8, The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.29841-69-8, Name is (1S,2S)-(-)-1,2-Diphenylethylenediamine, molecular formula is C14H16N2. In a Article，once mentioned of 29841-69-8

The bridge-opening reaction of [(eta4-C8H 12)2Rh2(mu-Cl)2] with chiral and achiral beta-amino alcohol nucleophiles gave mononuclear complexes [(eta4-C8H12)RhCl(HN(R)?OH-kappaN)] containing the amino alcohol ligands in N-monodentate coordination; HN(R)?OH = ethanolamine (4), 2-amino-2-methyl-1-propanol (5), and either enantiomer of (R)-, (S)-2-amino-3-methyl-1-butanol (D-, L-valinol) [(R)-6, (S)-6], (R)-, (S)-2-pyrrolidinemethanol (D-, L-prolinol) [(R)-7, [S)-7], (1S,2R)-, (1R,2S)-2-amino-1-phenyl-1-propanol (D-, L-norephedrine) [(1S,2R)-8, (1R,2S)-8], and (1S.2R)-, (1R,2S)-cis-1-amino-2-indanol [(1S,2R)-9, (1R,2S)-9], Coordination of the free hydroxy function of the N,O ligands was brought about by both dehydrochlorination, which furnished the neutral valinolato chelate complex [(eta4-C8H12)Rh{(S)-H 2NCH(CHMe2)CH2O-kappaN,kappaO}], (S)-10, and by precipitation of the metal-bound chloride with TlO3SCF 3 to produce ionic chelate complexes [(eta4-C 8H12)Rh(HN(R)?OH-kappaN,kappaO}]O 3SCF3; HN(R)?OH = 2-amino-2-methyl-1-propanol (11), (S)-2-amino-3-methyl-1-butanol [(S)-12], (S)-2-pyrrolidinemethanol [(S)-13], (IR,2S)-2-amino-1-phenyl-1-propanol [(1R,2S)-14], and (1R,2S)-cis-1-amino-2- indanol [(1R,2S)-15]. Except for only two in situ characterized [{(R)-binap}Rh(H2N?OH-kappaN,kappaO)]+ cations, where H2N?OH = L-valinol or L-norephedrine, no compound containing the various N,O ligands in addition to mono- or bidentate phosphanes could be prepared. In contrast, the P2/N2-coordinated chelate complexes [{(R)-binap}Rh-(H2N?NH2)]BF 4 with H2N?NH2 = H2NCMe 2CMe2NH2 [(R)-(16)], (R,R)-H 2NCH(Ph)CH(Ph)NH2 [(R),(R,R)-17], and (R,R)-1,2-(H 2N)2C6H10 [(R),(R,R)-18] were easily obtained from [(eta4-C8H12)Rh{(R)-binap}] BF4 and 1,2-diamines. Oxidative addition of HCl to (R),(R,R)-17 produced trans-[{(R)-binap}-Rh(H)(Cl){(R,R)-H2NCH(Ph)CH(Ph)NH 2}]BF4 [(R),(R,R)-19], If activated by strong base (KOH), (R),(R,R)-17 and (R),(R,R)-19 acted as moderately active and enantioselective catalysts for the reduction of acetophenone by both direct and transfer hydrogenation: eemax: 71% (S). The crystal structures of 4, (S)-6, (R)-7, (1R,2S)-8, (S)-10, (1R,2S)-14, (1R,2S)-15, (R)-16, (R),(R,R)-17, and two alcohol/alcoholato addition compounds, [(eta4-C8H 12)Rh(H2NCMe2CH2O-kappaN,kappaO) ][(eta4-C8H12)Rh(H2-NCMe 2CH2OH-kappaN,kappaO)][(eta4-C 8H12)RhCl2] [1-2], and [(eta4- C8H12)Rh(H2NCMe2CH 2O-kappaN,kappaO)][(eta4-C8H 12)Rh(H2-NCMe2CH2OH-kappaN, kappaO)]Cl [1-3], were determined. Wiley-VCH Verlag GmbH & Co. KGaA, 2007.

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Reference：
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

Chemistry is the experimental and theoretical study of materials on their properties at both the macroscopic and microscopic levels.In a patent， COA of Formula: C14H16N2, Which mentioned a new discovery about 29841-69-8

A pair of 1,1?-binaphthalene-bridged bisporphyrins, (R)- and (S)-H1, were designed to examine their chiral discrimination abilities toward a range of model diamines by using UV-vis absorption, CD, and 1H NMR spectroscopy with the assistance of DFT molecular modeling. The spectroscopic titrations revealed that (R)-/(S)-H1 could encapsulate (R)-/(S)-DACH and (R)-/(S)-PPDA in the chiral bisporphyrin cavities, leading to the selective formation of sandwich-type 1:1 complexes via dual Zn-N coordination interactions. In particular, the chiral recognition energy (DeltaDeltaG) toward (R)-/(S)-DACH was evaluated to be -4.02 kJ mol-1. The binding processes afforded sensitive CD spectral changes in response to the stereostructure of chiral diamines. Remarkable enantiodiscrimination effects were also detected in the NMR titrations of (R)-/(S)-H1, in which the nonequivalent chemical shift (DeltaDeltadelta) can reach up to 0.57 ppm for (R)-/(S)-DACH. However, due to the large steric effect, another chiral diamine ((R)-/(S)-DPEA) could not be sandwiched in the chiral bisporphyrin cavity; therefore, (R)-/(S)-DPEA could hardly be discriminated by (R)-/(S)-H1. The present results demonstrate a chiral bisporphyrin host with integrated CD and NMR chiral sensing functions and also highlight the binding-mode-dependent character of its enantiodiscrimination performance for different chiral guests.

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Reference：
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

Reference of 29841-69-8, A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 29841-69-8, Name is (1S,2S)-(-)-1,2-Diphenylethylenediamine, molecular formula is C14H16N2. In a Article，once mentioned of 29841-69-8

A series of dendritic BINAP-Ru/chiral diamine catalysts were developed for asymmetric hydrogenation of various simple aryl ketones. The resulting catalytic system showed very attractive due to very good catalytic activity and enantioselectivity as well as facile catalyst recycling. In the case of 1-acetonaphthone and 2?-methyl-acetophenone, interesting e.e. value up to 95% was observed which are comparable to the enantioselectivity reported by Noyori under similar conditions and higher than that of the heterogeneous poly(BINAP)-Ru catalyst reported by Pu and co-workers [Tetrahedron Lett. 41 (2000) 1681].

Note that a catalyst decreases the activation energy for both the forward and the reverse reactions and hence accelerates both the forward and the reverse reactions.Reference of 29841-69-8, you can also check out more blogs about29841-69-8

Reference：
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

Synthetic Route of 29841-69-8, Because a catalyst decreases the height of the energy barrier, its presence increases the reaction rates of both the forward and the reverse reactions by the same amount.29841-69-8, Name is (1S,2S)-(-)-1,2-Diphenylethylenediamine, molecular formula is C14H16N2. In a article，once mentioned of 29841-69-8

Novel optically active salen ligands and their cobalt(II) complexes were synthesized on the basis of 1,3-dioxolane. Spectral parameters of the complexes and their catalytic activity in enantioselective reduction of carbonyl and unsaturated compounds with sodium tetrahydridoborate were studied. The catalytic reduction of acetophenone is characterized by quantitative yield, the optical yields ranging from 0 to 42%. Benzil and ethyl benzoylformate undergo noncatalytic reduction. The catalytic activity and enantioselectivity in the reduction prochiral C=C bond strongly depend on the solvent and change from low to moderate values in the reduction of methyl 2-acetylamino-3-phenylprop-2- enoate. Dimethyl 2-methylidenebutane-1,4-dioate is reduced in DMF and its mixtures with ethanol and toluene in quantitative yield; in chloroform, the optical yield reaches 89%, but the chemical yield sharply decreases.

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Reference：
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

Related Products of 29841-69-8, The reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.29841-69-8, Name is (1S,2S)-(-)-1,2-Diphenylethylenediamine, molecular formula is C14H16N2. In a Article，once mentioned of 29841-69-8

2-Chloro-1,3-diisopropyl-4,5-dimethylimidazolium tetrafluoroborate (1) serves as a convenient starting material for the preparation of mono- and bis(imidazolin-2-imine) ligands. Thus, the reaction of two equivalents of 1 with 1,2-ethylenediamine in the presence of potassium fluoride afforded the bis(2-aminoimidazolium) salt [BLiPrH2][BF4]2 (2), from which the achiral bis(imidazolin-2-imine) ligand N,N?-bis(1,3-diisopropyl-4,5-dimethylimidazolin-2-ylidene)-1,2-ethanediamine (BLiPr) can be obtained by deprotonation. Likewise, the reaction of 1 with (1R,2R)-(-)-1,2-diaminocyclohexane (DACH) gave [DACH(ImiPrH)2][BF4]2 (3) and its deprotonation the chiral, C2-symmetric diimine DACH(ImiPr)2 (4). Under similar conditions, chiral, C1-symmetric mono(imidazolin-2-imines) were obtained from the reaction of 1 with one equivalent of (1R,2R)-(-)-1,2-diaminocyclohexane (DACH) or (1S,2S)-(-)-1,2-diphenylethylenediamine (DPEN), which afforded the 2-aminoimidazolium salts [DACH(ImiPrH)NH2][BF4] (5) and [DPEN(ImiPrH)NH2][BF4] (6), respectively. The reaction of 4 with [(C6H6)RuCl2]2 gave ruthenium complex [(C6H6)Ru{DACH(ImiPr)2}]Cl2, [7]Cl2, which was treated with KPF6 to form [7][PF6]2. The ligand precursors 5 and 6 were deprotonated in the presence of [(C6H6)RuCl2]2, which resulted in the formation of complexes [(C6H6)Ru{DACH(ImiPr)NH2}Cl]Cl [8]Cl and [(C6H6)Ru{DPEN(ImiPr)NH2}Cl]Cl [9]Cl. Complexes [7][PF6]2, [8]Cl and [9]Cl were investigated for their ability to catalyze the transfer hydrogenation of acetophenone in isopropanol. Complex [8]Cl proved to be the most active system, while complex [9]Cl produced the highest enantioselectivity, albeit of only 27% ee. The molecular structures of [7][(C6H6)RuCl3]2·CH2Cl2, formed as a side product, and of [8]Cl·acetone were determined by X-ray diffraction analyses.

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Reference：
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, COA of Formula: C14H16N2, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 29841-69-8, Name is (1S,2S)-(-)-1,2-Diphenylethylenediamine, molecular formula is C14H16N2. In a Article, authors is Jadhav, Amol P.，once mentioned of 29841-69-8

The asymmetric vinylogous Michael reaction of cyclohexenone/medium and large cyclic enones with 2-silyloxyfuran is still a synthetic challenge. In this report, we have explored 1,4-conjugate addition of an enantioselective chiral, primary diamine catalyzed, 2-silyloxy furan to various cyclic enones and beta-substituted cyclic enones. The reaction provided syn-Michael adducts (cycloalkane connected gamma-butenolide) with good yields, diastereo and enantioselectivities. Furthermore, the synthetic potential of these syn-Michael adducts is demonstrated by 1,4-addition of nucleophiles on the butenolide substructure.

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Reference：
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

Chemistry is the experimental and theoretical study of materials on their properties at both the macroscopic and microscopic levels.In a patent， Product Details of 29841-69-8, Which mentioned a new discovery about 29841-69-8

Axial chirality is generated upon complexation of the novel triphos ligand with a metal. In the presence of the diamine dm-dabn, isomerization to the enantiopure triphos-Ru complex was observed. The dm-dabn ligand of the Ru complex exchanges with dpen at room temperature without racemization. dm-dabn = 3,3?-dimethyl-2,2?-diamino-1,1?-binaphthyl, dpen = 1,2-diphenylethylenediamine.

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Reference：
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

Chemistry is an experimental science, Formula: C14H16N2, and the best way to enjoy it and learn about it is performing experiments.Introducing a new discovery about 29841-69-8, Name is (1S,2S)-(-)-1,2-Diphenylethylenediamine

Chiral, C2-symmetric imidazolium and imidazolinium ions, as well as the corresponding copper- or silver-bound carbenoids, have been prepared. Structural study of these compounds by X-ray crystallography reveals a chiral pocket that surrounds the putative carbene site or the metal-carbene bond, at carbon 2, in three of the four ligands prepared. Preliminary investigation into the application of these complexes has shown one of them to be highly enantioselective in the hydrosilylation of acetophenone.

Sometimes chemists are able to propose two or more mechanisms that are consistent with the available data. Formula: C14H16N2, If a proposed mechanism predicts the wrong experimental rate law, however, the mechanism must be incorrect.Welcome to check out more blogs about 29841-69-8, in my other articles.

Reference：
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI

Related Products of 29841-69-8, Because a catalyst decreases the height of the energy barrier, its presence increases the reaction rates of both the forward and the reverse reactions by the same amount.29841-69-8, Name is (1S,2S)-(-)-1,2-Diphenylethylenediamine, molecular formula is C14H16N2. In a article，once mentioned of 29841-69-8

An enantiomerically pure chiral monomer (S,S)-2 was prepared and copolymerized with styrene and four different cross-linkers to produce four distinct microgel-supported chiral TsDPEN derivatives. These chiral copolymers were allowed to form complexes with [RuCl2(cymene)]2 and the resulting homogeneous catalysts were applied in asymmetric hydrogenation reactions of aromatic ketones to give enantioenriched secondary alcohols in quantitative yield. These polymeric catalysts can be easily separated from the reaction mixture and recycled several times without a significant loss in catalytic activity.

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Reference：
Metal catalyst and ligand design,
Ligand Template Strategies for Catalyst Encapsulation – NCBI