98327-87-8 Usage
Chemical Properties
1.1'-Binaphthyl-2.2'-diphemyl phosphine is White to light beige powder
Uses
Different sources of media describe the Uses of 98327-87-8 differently. You can refer to the following data:
1. racemic-2,2'-Bis(diphenylphosphino)-1,1'-binaphthyl ( (+/-)-BINAP ) is an essential role in the organic synthesis of enantioselective transformations catalyzed by the complexes of ruthenium, rhodium and palladium.
It is also employed in palladium-catalyzed arylamine coupling in the preparation of demethylthiocholchines.
used with Cu(II) to catalyze the addition of arylsulfonamides to styrenes and olefins.
2. (^+)-2,2'-Bis(diphenylphosphino)-1,1'-binaphthyl plays an essential role in the organic synthesis of enantioselective transformations catalyzed by the complexes of ruthenium, rhodium and palladium. It is also employed in palladium-catalyzed arylamine coupling in the preparation of demethylthiocholchines. It is used with Cu(II) to catalyze the addition of arylsulfonamides to styrenes and olefins.
3. 2,2'-Bis(diphenylphosphino)-1,1'-dinaphthalene is a powerful chiral auxiliary that is used as a homogeneous catalyst in some asymmetric chemical syntheses. 2,2'-Bis(diphenylphosphino)-1,1'-dinaphthalene is utilized for its high enantioselectivity and is used as a ligand to create coordination complexes.
Reactions
Phosphine Ligand Kit component.
Useful ligand for palladium-catalyzed carbon-nitrogen bond formation.
Useful ligand for rhodium-catalyzed C-C bond formation.
Useful ligand for palladium-catalyzed intramolecular acylation of aryl bromides via C-H activation.
Used in the preparation of Buchwald third generation precatalyst.
Used in methoxy directed Rhodium migration.
Used in Nickel catalyzed C-N cross-coupling reactions.
General Description
Racemic version of BINAP.
Purification Methods
Dissolve the enantiomer in toluene, wash it with 30% aqueous NaOH, three times with H2O, dry (Na2SO4), evaporate to ~15% of its volume and add an equal volume of degassed MeOH. Collect the solid, wash it with MeOH and dry it at 80o/0.005mm for 6hours. Recrystallise it from a 1:1 mixture of toluene/EtOH to optical purity (m 241-242o) [Takaya et al. Org Synth 67 20 1989]. [Noyori & Takaya Acc Chem Res 2 3 345 1990, Kitamura et al. Org Synth 71 1 1993, Takaya et al. Org Synth 72 74 1995, Kitamura et al. J Org Chem 57 4053 1992.]
Check Digit Verification of cas no
The CAS Registry Mumber 98327-87-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,8,3,2 and 7 respectively; the second part has 2 digits, 8 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 98327-87:
(7*9)+(6*8)+(5*3)+(4*2)+(3*7)+(2*8)+(1*7)=178
178 % 10 = 8
So 98327-87-8 is a valid CAS Registry Number.
98327-87-8Relevant articles and documents
The Trityl-Cation Mediated Phosphine Oxides Reduction
Landais, Yannick,Laye, Claire,Lusseau, Jonathan,Robert, Frédéric
supporting information, p. 3035 - 3043 (2021/05/10)
Reduction of phosphine oxides into the corresponding phosphines using PhSiH3 as a reducing agent and Ph3C+[B(C6F5)4]? as an initiator is described. The process is highly efficient, reducing a broad range of secondary and tertiary alkyl and arylphosphines, bearing various functional groups in generally good yields. The reaction is believed to proceed through the generation of a silyl cation, which reaction with the phosphine oxide provides a phosphonium salt, further reduced by the silane to afford the desired phosphine along with siloxanes. (Figure presented.).
Synthesis method of 2, 2 '-bisdiphenylphosphino-1, 1'-binaphthalene
-
, (2020/09/12)
The invention relates to a synthesis method of 2, 2 '-bisdiphenylphosphino-1, 1'-binaphthalene, which is realized by the following steps: step 1, carrying out BUCHERER reaction on 1, 1 '-binaphthyl-2-naphthol to generate 1, 1'-binaphthyl-2, 2 '-diamine; 2, subjecting 1, 1 '-binaphthyl-2, 2'-diamine to a Sandmeyer reaction to generate binaphthyl dibromide; and 3, carrying out a Grignard reaction onthe binaphthyl dibromide and diphenyl phosphine chloride to generate 2, 2 '-bisdiphenylphosphino-1, 1'-binaphthalene (BINAP). Bulk chemical raw materials are used and are low in price and easy to obtain, and the production cost is effectively reduced; the method has the advantages of easily available raw materials, high reaction yield, simple post-treatment, facilitation of industrial amplification, and strong industrial application prospect.
Metal-Free Reduction of Phosphine Oxides, Sulfoxides, and N-Oxides with Hydrosilanes using a Borinic Acid Precatalyst
Chardon, Aurélien,Maubert, Orianne,Rouden, Jacques,Blanchet, Jér?me
, p. 4460 - 4464 (2017/11/22)
The general reduction of phosphine oxides, sulfoxides, and amine N-oxides was achieved by combining bis(2-chlorophenyl)borinic acid with phenylsilane. The reaction was shown to tolerate a wide range of substrates and could be performed under mild conditions, with only 2.5 mol % of the easily synthesized catalyst. Mechanistic investigations pointed to a key borohydride as the real catalyst and at bis(2-chlorophenyl)borinic acid as a precatalyst.
