Catalyst ligands

10534-59-5, Tetrabutylammonium acetate is a catalyst-ligand compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

A 2.0 mmol of CoBr2*H2O, 2.0 mmol of H2bpb (1) and 4.0 mmol triethylamine were dissolved in 20 ml of DMF and stirred at RT and air for 20 min. Then 4.42 mmol of NEt4Br was added and the solution was stirred at RT and air an additional 12 h. DMF was removed in vacuo and the residue was dissolved in 30 ml of acetonitrile and filtered. Through adding 30 ml of diethyl ether to the solution and cooling down to 2 C a brown precipitate was formed. After filtering, washing with diethyl ether and drying under vacuo the product was yielded as a brown powder (56%). The complex is air-stable in the solid state and can be stored for months without degradation.

10534-59-5, As the paragraph descriping shows that 10534-59-5 is playing an increasingly important role.

Reference£º
Article; Adolph; Zevaco; Walter; Dinjus; Doering; Polyhedron; vol. 48; 1; (2012); p. 92 – 98;,
Metal catalyst and ligand design
Ligand Template Strategies for Catalyst Encapsulation – NCBI

1866-16-6, S-Butyrylthiocholine iodide is a catalyst-ligand compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

General procedure: The method was adapted for measurement of very low cholinesterase activity in samples, high throughput screening and serial assays. Thus, measurements on enzyme samples of 10 mul were performed either in a Peltier thermostated spectrofluorimeter F-7100 (Hitachi Ltd.,Japan) using standard spectrofluorimetic cuvettes of 1 cm-path length in a total volume of 1.5 ml, or in a titration microplate reader (TecanInfinite F Plex) using a total volume of 200 mul per well (96-well titration plate, 7.5mm well ?). Stock solutions of substrates were 100mM ATC or BTC prepared inwater. These solutions were stored at -20 C. Because of thioester unstability, only freshly thawed solutions were used. Final substrate concentrations ranged between 2 and 1000 muM. Stock solution of Probe IV was 1mM made in DMSO and stored at -20 C. The solution is light sensitive. The final concentration of Probe IV in current assays was 10 muM. During the time-course of assays for determination of ChE activity, the fluorescence stops increasing when 1% of substrate is consumed, i.e. 10 muM thiocholine released. Thus, under steady-state conditions, [S] is almost constant and remains much larger than the enzyme concentration, i.e. >0.798mM for [S0]=800 muM. Then, the initial rate is linear until consumption of all probe. The final DMSO concentration in assay was 1% v/v. Though DMSO is known as a reversible ChE inhibitor (e.g. for human AChE,IC50=2.6% v/v in the presence of 1mM ATC), the inhibitory effect of 1% DMSO was considered as weak. The current volume of pure enzymes per assay was 15 mul in spectrofluorimetric cuvette and 10 mul per plate reader well. However, assays were also performed with sample volumes ranging from 5 to 30 mul. The final concentration in active sites per assay was as low as 10-12 M. For most kinetic studies, the active site concentration was 1.3¡Á10-10 M for BChE, 2.5¡Á10-11M for AChE, 3¡Á10-9M for BChE mutant E197Q and 1.5¡Á10-9M for mutant E197G. Measurements of activity were performed at the optimum pH of both enzymes and 25 C, the standard temperature for kinetic and thermodynamic studies. The rate of hydrolysis of ATC or BTC wasmonitored in 0.1M sodium phosphate buffer pH 8 for AChE and pH 7 for wild-type and mutants of BChE at 25 C for 3 min in spectrofluorimeter and for 2 min in microplate reader by the fluorescence emission of Probe IV-thiocholine conjugate (Scheme 2) (DeltaIF/dt) withlambdaex=400 nm and lambdaem =465 nm. On Hitachi spectrofluorimeter, lambdaex slit was 5.0 nm and lambdaem slit 10.0 nm. The Tecan titration plate readerwas equipped with light filters with bandwith of lambdaex ¡À 35 nm andlambdaem ¡À 35 nm. The fluorescence background of Probe IV was substracted. In addition, owing to the spontaneous hydrolysis of ATC and BTC, the fluorescence background due to spontaneous substrate hydrolysis was substracted for each concentration. Assays of human plasma BChE in a total volume of 2 ml were performed using 0.8mM BTC in 0.1M sodium phosphate buffer at 25 C. 1to 100 mul of plasma samples were taken for measurements using the classical Ellman’s method. For determination of BChE activity using the Probe IV method, plasma was diluted 100 or 1000 times in 0.1M phosphate buffer pH 7.0, and 1-100 mul samples of diluted plasma wereassayed in spectrofluorimeter. For both methods, reaction rates were recorded for 2 min.

1866-16-6, The synthetic route of 1866-16-6 has been constantly updated, and we look forward to future research findings.

Reference£º
Article; Mukhametgalieva, Aliya R.; Zueva, Irina V.; Aglyamova, Aliya R.; Lushchekina, Sofya V.; Masson, Patrick; Biochimica et Biophysica Acta – Proteins and Proteomics; vol. 1868; 1; (2020);,
Metal catalyst and ligand design
Ligand Template Strategies for Catalyst Encapsulation – NCBI

10581-12-1, Tetramethylammonium acetate is a catalyst-ligand compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

Example 2 In a round flask, 2 mL of methyl cyanide (acetonitrile) as an organic solvent was introduced, 0.145 g (1 mmol) of 5-chloromethylfurfural (CMF, compound I) was dissolved in the organic solvent, 0.133 g (1 mmol) of tetramethylammonium acetate was added to the solution, and then the mixed solution was reacted at normal pressure and room temperature for 5 minutes. After the reaction, the reaction product was extracted by the addition of a small amount of water (5 mL) and ethyl acetate (added twice by 20 mL) to obtain an organic layer. The obtained organic layer was concentrated under reduced pressure to obtain light yellow liquid 5-acetoxymethylfurfural (AcHMF, compound II). The yield thereof is 95%. It was ascertained by 1H-NMR that the light yellow liquid is a target material. Analysis data is as follows. AcHMF: 1H NMR (400 MHz, CDCl3) 9.65 (s, 1H), 7.25 (d, J=3.6, 1H), 6.62 (d, J=3.6, 1H), 5.13 (s, 2H), 2.12 (s, 3H)

10581-12-1, 10581-12-1 Tetramethylammonium acetate 82741, acatalyst-ligand compound, is more and more widely used in various fields.

Reference£º
Patent; Kim, Baek Jin; Cho, Jin Ku; Kim, Sangyong; Lee, Do Hoon; Kim, Young Gyu; Kang, Eun-Sil; Hong, Yeon-Woo; Chae, Da Won; US2015/51413; (2015); A1;,
Metal catalyst and ligand design
Ligand Template Strategies for Catalyst Encapsulation – NCBI

137848-29-4, (S)-2′-Amino-[1,1′-binaphthalen]-2-ol is a catalyst-ligand compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

To a 100 ml single-necked flask, 0.74 g of picolinic acid, 1.43 g of (S)-NOBIN and 25 ml of THF were added, and after stirring at room temperature for 10 minutes to fully dissolve, 1.52 g of dehydrating agent DMTMM was added.Continue to stir at room temperature and track by TLC until the raw NOBIN disappears.Add 20 ml of water, stir for 10 min to separate the aqueous layer and extract three times with ether, 20 ml each time.Combine the organic layers and use 5 ml of saturated sodium bicarbonate solution in order.After washing with saturated saline and a 5% dilute hydrochloric acid solution, it was dried over anhydrous sodium sulfate.The crude product after filtration and concentration under reduced pressure was chromatographed on a 25 g silica gel column to obtain 1.75 g of a white amide solid with a yield of 90%.

137848-29-4, 137848-29-4 (S)-2′-Amino-[1,1′-binaphthalen]-2-ol 3617797, acatalyst-ligand compound, is more and more widely used in various fields.

Reference£º
Patent; Dalian Institute of Chemical Physics; Hu Xiangping; Hu Xinhu; (10 pag.)CN110551036; (2019); A;,
Metal catalyst and ligand design
Ligand Template Strategies for Catalyst Encapsulation – NCBI

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.170161-27-0,Tri-tert-butyl 1,4,8,11-tetraazacyclotetradecane-1,4,8-tricarboxylate,as a common compound, the synthetic route is as follows.

A mixture of terephthalaldehyde (134 mg, 1.0 mmol) and triBoc-cyclam (250 mg, 500 mol) inDCM (10 mL) was stirred at ambient temperature for 2 h and then sodium triacetoxyborohydride (318mg, 1.5 mmol) was added. The mixture was stirred overnight at ambient temperature. The reaction wasquenched with aqueous NaHCO3, the layers were separated and the aqueous layer was extracted withdichloromethane. The combined organic layers were dried over anhydrous sodium sulfate andevaporated. The crude residue was purified by Combi-Flash (silica gel; ethyl acetate in hexanes) to givePKS8204 (198 mg, 64%) as a colorless gum, which turned into a fluffy solid under vacuum., 170161-27-0

As the paragraph descriping shows that 170161-27-0 is playing an increasingly important role.

Reference£º
Article; Amor-Coarasa, Alejandro; Kelly, James M.; Singh, Pradeep K.; Ponnala, Shashikanth; Nikolopoulou, Anastasia; Williams, Clarence; Vedvyas, Yogindra; Jin, Moonsoo M.; David Warren; Babich, John W.; Molecules; vol. 24; 8; (2019);,
Metal catalyst and ligand design
Ligand Template Strategies for Catalyst Encapsulation – NCBI

167316-27-0, N-((1S,2S)-2-Amino-1,2-diphenylethyl)-4-methylbenzenesulfonamide is a catalyst-ligand compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

[RUCL2 (RL6-P-CYMENE)] 2 (0.84g, 1. 37MMOL), ET3N (0.67g, 6. 66MMOL, 0.93mL), and (1S, 2S)-N-P-TOLUENESULFONYL-1, 2-DIPHENYLETHYLENEDIAMINE (L. OG, 2. 72MMOL, 1. 78MOL% based upon ketone) are combined in a 500ML 1N round bottom flask. Isopropanol (25 mL) and Et3N (0.67g, 6. 66MMOL, 0.93mL) is added, a reflux condenser is attached and the mixture is warmed under reflux, and maintained, for 1 hour. Cool to room temperature and concentrate in vacuo (rotovapor followed by vacuum pump) to furnish the catalyst as a brown powdery solid. To the catalyst is added anhydrous DMF (Aldrich Sure Seal, 225mL), followed in order by 2- chloroacetylpyridine (23. 88G, 0. 153MOL) and HCOOH/Et3N (5: 2, Fluka, 55ML). After ca. 2-3 minutes of stirring (room temperature) bubbles (presumed to be CO2) are apparent, emanating from the stirring vortex of the red-black solution. Reaction progress is monitored by reverse phase analytical HPLC, and after 75 minutes of stirring, the starting material had been consumed (95: 5 NAH2PO4/H3PO4 buffered water/CH3CN to 5: 95,17 minutes; retention time of starting chloroketone: 7.39 minutes, retention time of halohydrin 2.66 minutes). Quench the reaction by adding MEOH (25ML), stir 5 minutes and then the DMF, etc is removed in vacuo (cold finger rotovapor, vacuum pump) to give a red-black viscous oil. The crude material is taken up in ET2O/CH2CL2 (4: 1,1. 25L), placed in a 3L separatory funnel, wash with saturated aq. NAHC03 (1. OL), brine (1. OL), and dried (NA2S04). Filtration and concentration in vacuo affords the crude product as a red-orange oil which is purified by chromatography on a column of silica gel (70MM OD, 250g 230-400mesh, packed hexanes; compound applied in CH2CIZ/HEXANES 60: 40; eluted with HEXANES/ET20 (75: 25 2L; 65: 35 2L; 55: 45 2L; 350mL fractions) using the flash technique. Fractions 9-16 are combined to afford 14. 72G (61%) of the target halohydrin as pale yellow solid. Physical Characteristics: MP: 47-48C ; 1H-NMR (400MHZ, CDC13) : 8 = 8.65, 7.92, 7.58, 7.44, 5.13, 4.60, 3.91 ; IR (neat): 3138, 3074,3029, 3014,2974, 2964,2955, 2895,2862, 2848, 2472,2350, 2328,2305, 2261 CM-1 ; Anal. Found: C, 53.23 ; H, 5.12 ; N, 8. 82 ; Specific Rotation LA] D25 =-39 (c 0.94, CH2C12) ; Chiral HPLC Analysis (Chiracel OJ): 98: 2; 96% ee. [RUCL2 (N6-P-CYMENE)] 2 (0. 99G, 1. 61MMOL), Et3N (0.67g, 6. 66MMOL, 0. 93ML), and (1S, 2S)-N-P-TOLUENESULFONYL-1, 2-DIPHENYLETHYLENEDIAMINE (1. 18G, 3. 22MMOL, 2. 10MOL% based upon ketone) are combined in a 500ML 1N round bottom flask. i- PROH (25 mL) and Et3N (0.67g, 6. 66MMOL, 0. 93ML) are added, a reflux condenser is attached and the mixture is warmed under reflux, and maintained, for 1 hour. Cool to room temperature and concentrate in vacuo (rotovapor) to furnish the catalyst as an orange-brown powdery solid. To the catalyst is added anhydrous DMF (Aldrich Sure SEAL , 250mL), followed in order by 2-chloroacetylfuran (22.3g, 0. 154MOL) and HCOOH/Et3N (5: 2, Fluka, 55ML). After ca. 2-3 minutes of stirring (room temperature) bubbles (presumed to be C02) are apparent, emanating from the stirring vortex of the red-black solution. Reaction progress is monitored by reverse phase analytical HPLC, and after 65 minutes of stirring, the starting material had been consumed (95: 5 NAH2PO4/H3PO4 buffered water/CH3CN to 5: 95,17 minutes; retention time of starting chloroketone: 6.70 minutes, retention time of halohydrin 6.35 minutes). Quench the reaction by adding MEOH (25mL), stir 5 minutes and then the reaction mixture is poured into ice-water (1L) and the aqueous phase is saturated with salt. The mixture is transferred to a 2L separatory funnel with ether (500ML), shaken, and the organic phase is removed. The aqueous layer is extracted with ether (3X250mL) and the combined organic layers are wash with saturated aq. NAHC03 (0. 5L), brine (4X250ML), and dried (NA2S04). Filtration and concentration in vacuo affords the crude product as a red-orange oil (22.7g) that is triturated with ETHER/PENTANE (10: 90,4X 100ML). The combined triturates are concentrated in vacuo (take care as the halohydrin is volatile, hence the choice of ether/pentane as triturant and no removal of DMF in vacuo) to furnish the desired halohydrin R-1- (2-FURYL)-2- chloroethanol (16.03g, 71%) in good purity as determined by HPLC AND 1H-NMR. Physical Characteristics : 1H-NMR (400MHZ, CDC13) : 5 = 7.41, 6.32, 4.92, 3. 82, 2.58 ; IR (liq. ) 3373,2475, 2084,2023, 1940,1505, 1226,1151, 1142, 1089, 1068, 1012, 884, 818, 742 CM-1 ; MS (EI) M/Z (rel. intensity) 146 (13), 148 (4), 146 (13), 98 (4), 97 (base), 95 (4), 94 (2), 69 (6), 65 (2), 41 (7), 39 (3); HRMS (EI) found 146.0133 ; Specific Rotation [AD2S] =-18 (c 0.97, methanol); Chiral HPLC Analysis (Chiracel OJ) : 99: 1 ; 98% ee., 167316-27-0

The synthetic route of 167316-27-0 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; PHARMACIA & UPJOHN COMPANY; WO2004/85414; (2004); A1;,
Metal catalyst and ligand design
Ligand Template Strategies for Catalyst Encapsulation – NCBI

485-71-2, Cinchonidine is a catalyst-ligand compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

General procedure: A mixture of 2 or 3 (0.50 mmol), the corresponding acids RCOOH (0.60 mmol),DCC (0.60 mmol), DMAP (0.1 mmol) in dry dichloromethane (15 mL) was stirred atroom temperature. When the reaction was completed, and checked by TLC, the mixturewas filtered to remove urea from the reaction, and the filtrate was diluted bydichloromethane (45 mL). Subsequently, the diluted organic phase was washed bysaturated aqueous NaHCO3 (30 mL), and brine (30 mL), dried over anhydrousNa2SO4, concentrated in vacuo, and purified by CC to give the pure 9R/S-acyloxyderivatives of cinchonidine and cinchonine 5a-j,l-o and 6a,c,e-o [17-19]. The dataof target compounds are shown as follows.

485-71-2, 485-71-2 Cinchonidine 101744, acatalyst-ligand compound, is more and more widely used in various fields.

Reference£º
Article; Che, Zhi-Ping; Chen, Gen-Qiang; Jiang, Jia; Lin, Xiao-Min; Liu, Sheng-Ming; Sun, Di; Tian, Yue-E; Yang, Jin-Ming; Zhang, Song; Journal of Asian Natural Products Research; (2020);,
Metal catalyst and ligand design
Ligand Template Strategies for Catalyst Encapsulation – NCBI

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.4045-44-7,1,2,3,4,5-Pentamethylcyclopenta-1,3-diene,as a common compound, the synthetic route is as follows.

Under an argon atmosphere the excess of 1,2,3,4,5-pentamethylcyclopentadiene(19 mL, 0.167 mmol) was added to the suspensionof [(C8H14)2RhCl]2 (30 mg, 0.084 mmol) in C2H4Cl2 (1 ml).The reaction mixture was stirred overnight at room temperature.Then, the excess of NaHCO3 (84 mg, 1.00 mmol) was added and themixture was cooled to 0 C in an ice bath. The solution of bromine(135 mg, 43 mL, 0.84 mmol) in C2H4Cl2 (0.5 ml)was added dropwise.After the addition, the reaction mixture was stirred for another30 min at 0 C. The mixture was then opened to air and filtered, theprecipitate was washed with C2H4Cl2 (4 1 ml) and the combinedsolution was evaporated in vacuum. The precipitate (presumably[Cp*RhBr3]n) was washed with Et2O (32 ml) and dried in vacuum(20 mg, 50%). The obtained precipitate was suspended in hot C2H4Cl2 (3 ml)and ethylene was bubbled through until the complete dissolutionof the precipitate. The mixture was evaporated to dryness in vacuum.The residue was dissolved in CHCl3 (1 ml) and the product 3was precipitated by Et2O (5 ml) as red powder, which was dried invacuum (16 mg, 94%).1H NMR (400 MHz, CDCl3): delta 1.73 (s, 15H). 13C NMR (101 MHz,CDCl3): delta 94.98 (d, JRh-C 8.8 Hz), 10.15. Anal. Calc. forC10H15RhBr2: C 30.18, H 3.80; found: C 30.58, H 3.98., 4045-44-7

As the paragraph descriping shows that 4045-44-7 is playing an increasingly important role.

Reference£º
Article; Pototskiy, Roman A.; Lisov, Alexey A.; Nelyubina, Yulia V.; Perekalin, Dmitry S.; Journal of Organometallic Chemistry; vol. 862; (2018); p. 71 – 75;,
Metal catalyst and ligand design
Ligand Template Strategies for Catalyst Encapsulation – NCBI

3779-42-8, 3-Bromo-N,N,N-trimethylpropan-1-aminium bromide is a catalyst-ligand compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

COMPOUND 36; 5.10,15-tris-[4-(3-Trimethyl-ammoniopropyloxy)-phenyl]-20-(4- tetradecyloxy-phenyl )-porplryrin trichloride; The n-tetradecyloxy-analogue of Compound 2, prepared similarly as described above for Compound 2 but using 1-bromotetradecane in place of 1-bromoundecane, (50 mg, 0.057 mmol) and (l-bromopropyl)- trimethylammonium bromide (210 mg, 0.8 mmol) are dissolved and K2CO3 (230 mg, 1.7 mmol) is suspended in DMF (20 mL). The vigorously stirred mixture is stirred at this temperature for 18 h. After removal of DMF under reduced pressure the residue obtained is dissolved in methanol (5 mL) and filtered through a pad of silica gel (depth 2 cm) supported on a steel frit (diameter 3.5 cm). After washing the pad with methanol (ca. 500 mL) it is eluted with acetic acid:methanol .-water (3 :2:1, by vol.). After evaporation of the solvent from appropriately combined fractions, the residue obtained is purified by chromatography on a column (2.5 x 40 cm) of Sephadex LH-20 eluting with n-butanol:water:acetic acid (4:5:1, by vol., upper phase) for separation from the excess of ammonium salt and other contaminating materials. After elution and removal of the solvent from appropriate fractions, the residue obtained is dissolved in methanol (5 mL) and passed through a short column (3.5 x 20 cm) of anion exchange resin (Amberlite IRA 400, chloride form). Solvent is removed under reduced pressure and the residue obtained is dried under high vacuum to afford the product as a violet solid.1H-NMR: deltaH (300MHz, CD3OD): 0.75 (t, 3J 7.5 Hz, 3 H), 0.95-1.25 (m, 22 H), 1.50-1.65 (bs, 2 H), 2.20-2.40 (bs, 6 H)5 3.05-3.15 (bs, 27 H), 3.45-3.60 (bs, 6 H), 3.60-3.80 (bs, 2 H), 4.05-4.25 (bs, 6 H), 6.80-7.25, 7.65-8.05, (2 x m, 16 H)5 8.45-8.95 (bs, 8 H)., 3779-42-8

3779-42-8 3-Bromo-N,N,N-trimethylpropan-1-aminium bromide 151145, acatalyst-ligand compound, is more and more widely used in various fields.

Reference£º
Patent; DESTINY PHARMA LIMITED; WO2006/765; (2006); A1;,
Metal catalyst and ligand design
Ligand Template Strategies for Catalyst Encapsulation – NCBI

112881-51-3, 4′-(4-Pyridyl)-2,2′:6′,2”-terpyridine is a catalyst-ligand compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

General procedure: [Ru(1)(3)](PF6)2 was prepared according to the literature procedure.[16] Ru(1)Cl3 (0.10 g, 0.19 mmol) and ligand 3 (0.06 g,0.19 mmol) were suspended in ethane-1,2-diol (10 mL) and heated at reflux for 2 h. The red solution was cooled to room temperature and excess aqueous KPF6 was added. The resulting red precipitate was collected on Celite, dissolved in acetonitrile,and purified by column chromatography (SiO2, MeCN/H2O/saturated aqueous KNO3 14 : 1.2 : 0.5). The main red band was collected, excess aqueous KPF6 was added, and the solvent volume reduced to give a fine red precipitate, which was collected on Celite and washed with water (20 mL), ethanol (10 mL), and diethyl ether (20 ml). The residue was dissolved in MeCN and the solvent removed to give [Ru(1)(3)](PF6)2 as a red powder (0.07 g, 0.07 mmol, 36 %).

112881-51-3, As the paragraph descriping shows that 112881-51-3 is playing an increasingly important role.

Reference£º
Article; Iranmanesh, Hasti; Arachchige, Kasun S. A.; Donald, William A.; Kyriacou, Niamh; Shen, Chao; Price, Jason R.; Beves, Jonathon E.; Australian Journal of Chemistry; vol. 70; 5; (2017); p. 529 – 537;,
Metal catalyst and ligand design
Ligand Template Strategies for Catalyst Encapsulation – NCBI