22094-23-1Relevant academic research and scientific papers
Regioselective hydroformylation of vinyl esters catalyzed by Rh(acac)(CO)2 with simple and efficient diphosphinite ligands
Khan, Shoeb R.,Bhanage, Bhalchandra M.
, p. 109 - 112 (2014)
Simple and efficient diphosphinite ligands were evaluated in rhodium catalyzed hydroformylation of vinyl acetate. The effect of various reaction variables like temperature, pressure, substrate/Rh ratio, P/Rh ratio, solvents, time and different types of phosphorous ligands were studied. The diphosphinite ligand exhibited a considerable impact on the hydroformylation of vinyl esters and provided good turnover number (up to 10,000) with excellent regioselectivity (99%) to branched aldehyde. Wide range of vinyl esters including long chain aliphatic vinyl esters (up to C18) were well tolerated to provide good to excellent yield of desired product.
Regioselective hydroformylation of vinyl acetate catalyzed by rhodium complex of naphthyl-based monodentate bulky phosphine and phosphite ligands
Dabbawala, Aasif A.,Bajaj, Hari C.,Rao, Ganga V.S.,Abdi, Sayed H.R.
, p. 185 - 193 (2012)
The hydroformylation of vinyl acetate was carried out using rhodium complex of naphthyl-based monodentate bulky phosphine and phosphite ligands. All the naphthyl-based ligands favored the formation of desire branched aldehyde. High turnover frequency with excellent regioselectivity to branched aldehyde and high selectivity to aldehyde were observed with bulky phosphite ligands. The effect of partial pressure of CO and H2, concentration of vinyl acetate, stirring rate and solvents on the hydroformylation of vinyl acetate catalyzed by Rh/bulky phosphite were examined precisely in order to improve the catalytic activity and selectivity. In contrast to conventional organic solvents, the significant influence on the activity and selectivity was observed in organic carbonates ('green' solvent) particularly in propylene carbonate (PC). The PC/catalyst system could be recycled without significant loss of activity and selectivity.
Phosphine ligand compound and preparation method thereof, catalyst composition and application thereof, and vinyl acetate hydroformylation method
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Paragraph 0103-0120, (2020/07/13)
The invention relates to the field of vinyl acetate hydroformylation, and discloses a phosphine ligand compound and a preparation method thereof, a catalyst composition and application thereof, and avinyl acetate hydroformylation method. The phosphine ligand compound has a structure shown as a formula (1); wherein A is selected from a substituted or unsubstituted C1-C20 alkylene group; B1 and B2are each independently selected from a substituted or unsubstituted biphenyl group; substituent groups optionally existing in A, B1 and B2 are respectively and independently selected from at least oneof C1-C20 alkyl, halogen, C1-C10 alkoxyl, hydroxyl, carboxyl and aldehyde group; and the provided phosphine ligand compound can effectively improve the conversion rate of vinyl acetate and the selectivity of 2-acetoxy propionaldehyde.
Phosphine ligand compound and preparation method thereof, catalyst composition and application thereof and vinyl acetate hydroformylation method (by machine translation)
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Paragraph 0106-0127, (2020/07/13)
The invention relates to the field of vinyl acetate hydroformylation, and discloses a phosphine ligand compound and a preparation method thereof, a catalyst composition and application of the phosphine ligand compound and vinyl acetate hydroformylation. The phosphine ligand compound has the structure shown in the formula (1); and A and B1 And B2 C is each independently selected from substituted or unsubstituted C1 - C20 Alkylene; and A, B1 And B2 The optionally present substituents are each independently selected from C. 1 - C20 Alkyl, halogen and C1 - C10 The phosphorus ligand compound provided by the invention can effectively improve the vinyl acetate conversion rate and 2 - acetoxy propionaldehyde selectivity. (by machine translation)
Phosphine ligand compound and preparation method thereof, catalyst composition and application thereof, and vinyl acetate hydroformylation method
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Paragraph 0116-0117; 0132-0133; 0137, (2020/07/13)
The invention relates to the field of vinyl acetate hydroformylation, and discloses a phosphine ligand compound and a preparation method thereof, a catalyst composition and application thereof, and avinyl acetate hydroformylation method. The phosphine ligand compound has a structure shown as a formula (1); wherein A is selected from substituted or unsubstituted phenyl and substituted or unsubstituted biphenyl; B1 and B2 are each independently selected from a substituted or unsubstituted biphenyl group; substituent groups optionally existing in A, B1 and B2 are respectively and independently selected from at least one of C1-C20 alkyl, halogen, C1-C10 alkoxyl, hydroxyl, carboxyl and aldehyde group; and the provided phosphine ligand compound can effectively improve the conversion rate of vinyl acetate and the selectivity of 2-acetoxy propionaldehyde.
Phosphine ligand compound and preparation method thereof, catalyst composition and application thereof and vinyl acetate hydroformylation method (by machine translation)
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Paragraph 0094-0095; 0106-0107; 0111, (2020/07/13)
The invention relates to the field of vinyl acetate hydroformylation, and discloses a phosphine ligand compound and a preparation method thereof, a catalyst composition and application of the phosphine ligand compound and vinyl acetate hydroformylation. The phosphine ligand compound has the structure shown in the formula (1); wherein A is selected from substituted or unsubstituted phenyl; B1 And B2 C is each independently selected from substituted or unsubstituted C1 - C20 Alkylene; A, B1 And B2 The optionally present substituents are each independently selected from C. 1 - C20 Alkyl, halogen and C1 - C10 The phosphorus ligand compound provided by the invention can effectively improve the vinyl acetate conversion rate and 2 - acetoxy propionaldehyde selectivity. (by machine translation)
Phosphine ligand compound and preparation method thereof, catalyst composition and application thereof and vinyl acetate hydroformylation method (by machine translation)
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Paragraph 0112-0117, (2020/07/13)
The invention relates to the field of vinyl acetate hydroformylation, and discloses a phosphine ligand compound and a preparation method thereof, a catalyst composition and application of the phosphine ligand compound and vinyl acetate hydroformylation. The phosphine ligand compound has the structure shown in formula (1); wherein A is selected from substituted or unsubstituted phenyl; R1 , R2 , R3 And R4 C is each independently selected from substituted or unsubstituted C1 - C20 Alkyl, substituted or unsubstituted phenyl; A, R1 , R2 , R3 And R4 The optionally present substituents are each independently selected from C. 1 - C20 Alkyl, halogen and C1 - C10 The phosphorus ligand compound provided by the invention can effectively improve the vinyl acetate conversion rate and 2 - acetoxy propionaldehyde selectivity. (by machine translation)
Tetradentate phosphine ligand and preparation method thereof, hydroformylation catalyst and reaction method, and preparation method of 1, 3-propylene glycol
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Paragraph 0070-0073; 0081-0092, (2020/08/25)
The invention provides a tetradentate phosphine ligand, a preparation method of the tetradentate phosphine ligand, a hydroformylation catalyst, a reaction method of the hydroformylation catalyst and apreparation method of 1, 3-propylene glycol, and belongs to the technical field of compound materials. The general formula of the tetradentate phosphine ligand is shown in the specification, whereinR1 is hydrogen or halogen, R2 is a nitrogen-containing heterocyclic ring or a complex of the tetradentate phosphine ligand and a rhodium complex, can be used for carrying out a hydroformylation catalytic reaction, and can be used for preparing 1, 3-propylene glycol.
Phosphine ligand compound and preparation method thereof, catalyst composition and application thereof, and vinyl acetate hydroformylation method
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Paragraph 0106-0124, (2020/07/13)
The invention relates to the field of vinyl acetate hydroformylation, and discloses a phosphine ligand compound and a preparation method thereof, a catalyst composition and application thereof, and avinyl acetate hydroformylation method. The phosphine ligand compound has a structure shown as a formula (1); wherein A is selected from substituted or unsubstituted biphenyl; B1 and B2 are each independently selected from substituted or unsubstituted C1-C20 alkylene groups; substituent groups optionally existing in A, B1 and B2 are respectively and independently selected from at least one of C1-C20 alkyl, halogen, C1-C10 alkoxyl, hydroxyl, carboxyl and aldehyde group; and the provided phosphine ligand compound can effectively improve the conversion rate of vinyl acetate and the selectivity of2-acetoxy propionaldehyde.
Hydroformylation of unsaturated esters and 2,3-dihydrofuran under solventless conditions at room temperature catalysed by rhodium: N-pyrrolyl phosphine catalysts
Alsalahi,Trzeciak
, p. 16990 - 16999 (2019/11/14)
Rhodium complexes of the type HRh(CO)L3 (where L is an N-pyrrolyl phosphine, such as P(NC4H4)3, PPh(NC4H4)2, or PPh2(NC4H4)) were applied in the hydroformylation of less reactive unsaturated substrates, namely allyl acetate, butyl acrylate, methyl acrylate, 2,3-dihydrofuran and vinyl acetate. Even at room temperature, these catalysts enabled complete substrate conversion and high chemoselectivity towards the corresponding aldehydes. High conversion of vinyl acetate (88% in 6 h) to the branched aldehyde was obtained with HRh(CO)[P(NC4H4)3]3 at 25 °C. An increase of the turnover frequency, TOF, up to 2000 mol mol-1 h-1 was achieved in this reaction under 20 bar of syngas (H2/CO = 1) at 80 °C. The introduction of chiral phosphines, BINAP or Ph-BPE, to this system resulted in the production of a branched aldehyde with enantioselectivity, ee, up to 44 and 81%, respectively. High activity combined with high enantioselectivity was achieved due to the formation of the mixed rhodium hydrides HRh(CO)[P(NC4H4)3](BINAP) and HRh(CO)[P(NC4H4)3](Ph-BPE), identified by the NMR method.
