Category: 23897-16-7

Nishiyama, Yoshitake published the artcileSynthesis of benzyl sulfides via substitution reaction at the sulfur of phosphinic acid thioesters, COA of Formula: C18H23OP, the publication is Chemical Communications (Cambridge, United Kingdom) (2020), 56(43), 5771-5774, database is CAplus and MEDLINE.

An ambident electrophilicity of phosphinic acid thioesters RSP(O)(R¹)₂ (R = Me, pent-4-en-1-yl, naphthalen-2-yl, thiophen-3-yl, etc.; R¹ = n-Bu, cyclohexyl, 2-methylphenyl, etc.) is disclosed. Unexpected carbon-sulfur bond formation took place in the reaction between phosphinic acid thioesters and Grignard reagents R²MgCl (R² = Bn, 1-phenylethyl, naphthalen-1-ylmethyl, etc.). The developed method for benzyl sulfides RSR² has a wide substrate scope and was applicable for the synthesis of a drug analog.

Chemical Communications (Cambridge, United Kingdom) published new progress about 23897-16-7. 23897-16-7 belongs to catalysis-chemistry, auxiliary class Aryl phosphine ligand,Mono-phosphine Ligands, name is Dimesitylphosphine oxide, and the molecular formula is C18H23OP, COA of Formula: C18H23OP.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Hu, Chen published the artcileLewis Acid-Controlled Regioselective Phosphorylation of 2-Indolylmethanols with Diarylphosphine Oxides: Synthesis of Highly Substituted Indoles, HPLC of Formula: 23897-16-7, the publication is Journal of Organic Chemistry (2018), 83(8), 4739-4753, database is CAplus and MEDLINE.

The Lewis acid-promoted phosphorylation of 2-indolylmethanols with diarylphosphine oxides is described. The regioselectivity of the reaction can be modulated by the choice of rare earth metal Lewis acid, offering a highly selective approach to structurally diverse indole derivatives in up to 97% yield for over 50 examples. This strategy features high selectivity, good functional group tolerance, and easy scalability. The utility of this method is further highlighted by facile modification of the products to access novel indole-based phosphine ligand.

Journal of Organic Chemistry published new progress about 23897-16-7. 23897-16-7 belongs to catalysis-chemistry, auxiliary class Aryl phosphine ligand,Mono-phosphine Ligands, name is Dimesitylphosphine oxide, and the molecular formula is C18H23OP, HPLC of Formula: 23897-16-7.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Lindner, Ekkehard published the artcileStudies on steric and electronic effects on the reactivity of acetyl(diorganyl)-phosphines and their oxides, Name: Dimesitylphosphine oxide, the publication is Chemische Berichte (1980), 113(10), 3268-74, database is CAplus.

Acetylphosphines MeCOPRR¹ (R = Ph, R¹ = PhCH₂, cyclohexyl, Me₃C or R = R¹ = m-CF₃C₆H₄ or mesityl) were prepared by reaction of MeCOCl with Me₃SiPRR¹ or HPRR¹ in the presence Et₃N. Only acetyldimesitylphosphine is stable to mol. oxygen. The corresponding oxides MeCOP(O)RR¹ (I) are formed by reaction of Ac₂O with HP(O)RR¹ and can be hydrolyzed with stoichiometric amounts of H₂O to give AcOH and HP(O)RR¹. I (R = Ph, R¹ = PhCH₂ or cyclohexyl, R = R¹ = m-CF₃C₆H₄) react further with HP(O)RR¹ to give alcs. HOCMe[P(O)RR¹]₂. Steric and electronic effects of the R and R¹ groups correlate with the reactivity of the prepared compounds

Chemische Berichte published new progress about 23897-16-7. 23897-16-7 belongs to catalysis-chemistry, auxiliary class Aryl phosphine ligand,Mono-phosphine Ligands, name is Dimesitylphosphine oxide, and the molecular formula is C18H23OP, Name: Dimesitylphosphine oxide.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Lindner, Ekkehard published the artcileStudies on steric and electronic effects on the reactivity of diorganyl(trifluoroacetyl)phosphines and their oxides, Related Products of catalysis-chemistry, the publication is Chemische Berichte (1980), 113(8), 2769-78, database is CAplus.

Reactions of phosphines CF₃COPRR¹ (I; R = Ph, R¹ = PhCH₂, cyclohexyl, Me₃C; R = R¹ = m-CF₃C₆H₄, mesityl) with O₂ showed that only the mesityl compound is not oxidized. I (R = R¹ = m-CF₃C₆H₄, mesityl) react with 30% H₂O₂ to give, resp., (m-CF₃C₆H₄)₂P(O)OH and adduct HP(O)(C₆H₂Me₃-2,4,6)₂.1.5H₂O₂. Oxides CF₃COP(O)RR¹ (II; R = Ph, R¹ = Me₃C; R = R¹ = mesityl) are hydrolyzed with stoichiometric amounts H₂O to give CF₃CO₂H and HP(O)RR¹, whereas II (R = Ph, R¹ = PhCH₂, cyclohexyl; R = R¹ = m-CF₃C₆H₄) react with hydrolytically formed secondary phosphine oxides to give alcs. CF₃C[P(O)RR¹]₂OH (III). III (R = R¹ = m-CF₃C₆H₄) is transformed immediately into the phosphinate CF₃CH[P(O)RR¹][OP(O)RR¹]. The preparation of the starting phosphines and their oxides is described and their reactivity related to electronic and steric effects.

Chemische Berichte published new progress about 23897-16-7. 23897-16-7 belongs to catalysis-chemistry, auxiliary class Aryl phosphine ligand,Mono-phosphine Ligands, name is Dimesitylphosphine oxide, and the molecular formula is C18H23OP, Related Products of catalysis-chemistry.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Haerling, Stephan M. published the artcilePotassium Dimesitylphosphinite Catalyzed Intermolecular Hydrophosphorylation of Alkynes, Formula: C18H23OP, the publication is Organometallics (2018), 37(23), 4380-4386, database is CAplus.

The authors evaluated the scope of the intermol. hydrophosphorylation (Pudovik reaction) of alkynes R¹-Cú·C-R² (R¹ = H, alkyl, Ph; R² = alkyl, Ph, COOMe, SiMe₃, Si(iPr)₃) with bis(2,4,6-trimethylphenyl)phosphine oxide (dimesitylphosphine oxide, Mes₂P(O)H) in THF at room temperature or 65¡ã, catalyzed with 5 or 10 mol % of K dimesitylphosphinite (Mes₂P-O-K), yielding alkenyldimesitylphosphine oxides (Mes₂P(O)-C(R¹):C(H)R²). This procedure requires substituents with a -I effect at the Cú·C triple bond, whereas alkyl-substituted alkynes are inactive under these reaction conditions. The hydrophosphorylation proceeds regioselectively, but E/Z isomer mixtures were obtained. E/Z isomerization occurs at elevated temperatures with an estimated energy barrier of 59 kJ mol^-1 (R¹ = Me; R² = Ph). Trimethylsilyl substituents at the alkyne functionality (R¹ = H, Bu; R² = SiMe₃) destabilize the product, leading to degradation and formation of Mes₂P-O-SiMe₃ and R¹-Cú·C-H.

Organometallics published new progress about 23897-16-7. 23897-16-7 belongs to catalysis-chemistry, auxiliary class Aryl phosphine ligand,Mono-phosphine Ligands, name is Dimesitylphosphine oxide, and the molecular formula is C18H23OP, Formula: C18H23OP.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Dyer, Philip W. published the artcileRigid N-Phosphino Guanidine P,N Ligands and Their Use in Nickel-Catalyzed Ethylene Oligomerization, Name: Dimesitylphosphine oxide, the publication is Organometallics (2008), 27(19), 5082-5087, database is CAplus.

The rigid bidentate P,N-ligands I (3a–d, R substituent: a, Ph; b, mesityl; c, N-i-Pr₂; d, NPh₂), each with a 7-phosphino-1,5,7-triazabicyclo[4.4.0]dec-5-ene skeleton, are readily prepared in high yields and were used in the preparation of the Ni complexes [NiBr₂(3a–d)] (4a–d). The derivatives 4a,d are both diamagnetic, while their counterparts 4b,c are paramagnetic with values of ¦Ì_eff(300 K) of 2.05 and 2.10 ¦ÌB, resp. The structure of 4a was determined in the solid state by x-ray diffraction, which confirmed the ¦Ê²P,N coordination of 3a and the essentially square-planar geometry about Ni. In combination with EtAlCl₂ the Ni(II) complexes of 4b–d are active ethylene oligomerization initiators (C₂H₄, 1 bar; Ni:Al = 1:14; toluene), affording varying mixtures of butenes, hexenes, and octenes (trace), depending on the nature of the P-donor, but with a reasonable selectivity toward C₄ with complex 4c. In contrast, under identical reaction conditions complex 4a gives rise to products resulting from a sequence of ethylene oligomerization and subsequent Friedel-Crafts alkylation of the toluene solvent. Notably, no activity toward ethylene (1 bar) was observed for 4/MAO (Ni:Al = 1:15 or 1:500).

Organometallics published new progress about 23897-16-7. 23897-16-7 belongs to catalysis-chemistry, auxiliary class Aryl phosphine ligand,Mono-phosphine Ligands, name is Dimesitylphosphine oxide, and the molecular formula is C18H23OP, Name: Dimesitylphosphine oxide.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Nie, Shao-Zhen published the artcileEnantioselective Coupling of Dienes and Phosphine Oxides, Recommanded Product: Dimesitylphosphine oxide, the publication is Journal of the American Chemical Society (2018), 140(48), 16450-16454, database is CAplus and MEDLINE.

The authors report a Pd-catalyzed intermol. hydrophosphinylation of 1,3-dienes to afford chiral allylic phosphine oxides. Commodity dienes and air stable phosphine oxides couple to generate organophosphorus building blocks with high enantio- and regiocontrol. This method constitutes the 1st asym. hydrophosphinylation of dienes.

Journal of the American Chemical Society published new progress about 23897-16-7. 23897-16-7 belongs to catalysis-chemistry, auxiliary class Aryl phosphine ligand,Mono-phosphine Ligands, name is Dimesitylphosphine oxide, and the molecular formula is C18H23OP, Recommanded Product: Dimesitylphosphine oxide.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Belmokaddem, Fatima-Zohra published the artcileNovel nucleophilic/basic and acidic organocatalysts for reaction between poorly reactive diisocyanate and diols, Name: Dimesitylphosphine oxide, the publication is Designed Monomers and Polymers (2016), 19(4), 347-360, database is CAplus.

Original basic or acidic organic compounds derived from guanidine or Ph phosphonic acid were specifically designed and tested as new catalysts for the bulk synthesis of polyurethane prepolymers from a precursor system with particularly low reactivity (secondary alc. + aliphatic isocyanate at low temperature). Both families showed interesting catalytic activities at 60-80¡ã, but must nevertheless be used in much higher amounts (1 mol%, i.e. between 0.15 and 0.50 wt%) than traditional metal-based catalysts. The efficiency of guanidine derivatives seems to be related to their nucleophilicity, whereas that of phosphonic acid derivatives depends on their acidity. However, the solubility of the considered species in the reactive medium also plays a major role. The water/alc. selectivity of the catalysts, especially at room temperature, was then examined as an addnl. criterion. Guanidines are not selective and favor the reaction of isocyanate groups with water as much as that with alcs. Ph phosphonic acid derivatives are more selective, and particularly pentafluorophenyl phosphonic acid displays a remarkable catalytic activity together with an acceptable selectivity and could represent an interesting and safer alternative to toxic tin and mercury derivatives for many industrial polyurethanes.

Designed Monomers and Polymers published new progress about 23897-16-7. 23897-16-7 belongs to catalysis-chemistry, auxiliary class Aryl phosphine ligand,Mono-phosphine Ligands, name is Dimesitylphosphine oxide, and the molecular formula is C18H23OP, Name: Dimesitylphosphine oxide.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Beswick, Michael A. published the artcileMetal selection of ligand functionality in [(mes)₂PO₂Li¡¤2thf]₂ and [{(Me₃Si)₂N}Cd{(mes)₂P-O}₂Li¡¤2thf] (mes = C₆H₂Me₃-2,4,6), Recommanded Product: Dimesitylphosphine oxide, the publication is Chemical Communications (Cambridge) (1997), 583-584, database is CAplus.

The reaction of LiBu with [(mes)₂P(H):O] affords the diorganophosphinate complex [(mes)₂PO₂Li¡¤2THF] (1) and [(mes)₂PLi], however, addition of [Cd{N(SiMe₃)₂}₂] to the mixture gives the diorganophosphinite complex [{(Me₃Si)₂N}Cd{(mes)₂P-O}₂Li¡¤2THF] (2). The formation of these complexes illustrates that the ligand functionality of 1 can be controlled by the character of the coordinated metal ion. 1 And 2 were characterized by x-ray crystallog. (1: triclinic, space group P1?, R₁ = 0.045; 2: monoclinic, space group C2/c, R₁ = 0.064).

Chemical Communications (Cambridge) published new progress about 23897-16-7. 23897-16-7 belongs to catalysis-chemistry, auxiliary class Aryl phosphine ligand,Mono-phosphine Ligands, name is Dimesitylphosphine oxide, and the molecular formula is C18H23OP, Recommanded Product: Dimesitylphosphine oxide.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Willcox, Darren published the artcileAsymmetric ketone hydroboration catalyzed by alkali metal complexes derived from BINOL ligands, Name: Dimesitylphosphine oxide, the publication is Dalton Transactions (2020), 49(8), 2417-2420, database is CAplus and MEDLINE.

The ability of alkali metal complexes featuring functionalized BINOL-derived ligands to catalyze ketone hydroboration reactions was explored. The reduced products were formed in excellent yields and with variable enantioselectivities dependent upon the nature of the ligand and the alkali metal cation.

Dalton Transactions published new progress about 23897-16-7. 23897-16-7 belongs to catalysis-chemistry, auxiliary class Aryl phosphine ligand,Mono-phosphine Ligands, name is Dimesitylphosphine oxide, and the molecular formula is C11H9ClN2O, Name: Dimesitylphosphine oxide.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia