Category: chiral-catalyst

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.351498-10-7,6,6′-((1E,1’E)-((2,3-Dimethylbutane-2,3-diyl)bis(azanylylidene))bis(methanylylidene))bis(2,4-di-tert-butylphenol),as a common compound, the synthetic route is as follows.

Preparation of Cobalt(II) ComplexA 50 mL flask was charged with N,N’-bis(3,5-di-tert-butylsalicylidene)-l, 1,2,2- tetramethylethenediamine (0.4302 g, 0.78 mmol, 1.0 equiv), EtOH (17 mL), and Co(OAc)2 (0.1385 g, 0.78 mmol, 1.0 equiv). The mixture was degassed and then heated to reflux under nitrogen for 3 h, cooled to room temperature. The precipitate was filtered and the purple solid was washed with EtOH (10 mL) and dried under high vacuum to give 0.3533 g (75%) of the cobalt(II) complex., 351498-10-7

The synthetic route of 351498-10-7 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; VITAE PHARMACEUTICALS, INC.; CLAREMON, David, A.; WO2010/91067; (2010); A2;,
Chiral Catalysts
Chiral catalysts – SlideShare

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.137848-28-3,(R)-2′-amino-[1,1′-binaphthalen]-2-ol,as a common compound, the synthetic route is as follows.

To a magnetically stirred solution of R-(+)-2-amino-1,1′-binaphthalen-2-ol (0.206 g, 0.722 mmol) in DMAC (15 mL) was slowly added a solution of terephthaloyl chloride (0.0733 g, 0.361 mmol) in DMAC (10mL). After the addition was complete, the reaction mixture was stirred at room temperature for 24h and then concentrated in vacuo to give a crude tan solid. The solid was dissolved in CHCl3 (300 mL) and washed with water (3¡Á100 mL) and brine (50 mL). The organic phase was dried over anhydrous sodium sulfate and then concentrated in vacuo to furnish monomer 3RR (85% yield) as a light tan powder. mp: >250C (decomposition). 1H NMR (DMSO-d6, 500MHz) delta 9.74 (s, 2H), 8.83 (s, 2H), 8.15-8.18 (m, 2H), 8.03-8.07 (m, 2H), 7.97-8.02 (m, 4H), 7.91-7.95 (m, 2H), 7.43-7.48 (m, 2H), 7.37-7.41 (m, 2H), 7.24-7.33 (m, 4H), 7.09-7.17 (m, 8H), 6.86-6.90 (m, 2H); MS m/e: 701.24 ([M]H+). [alpha]D=(+)76 (c=0.130g/dL, THF)., 137848-28-3

As the paragraph descriping shows that 137848-28-3 is playing an increasingly important role.

Reference£º
Article; Lynch, Joseph G.; Jaycox, Gary D.; Polymer; vol. 55; 16; (2014); p. 3564 – 3572;,
Chiral Catalysts
Chiral catalysts – SlideShare

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.22795-99-9,(S)-(1-Ethylpyrrolidin-2-yl)methanamine,as a common compound, the synthetic route is as follows.

To 22 mg (0.039 mmol) of acid 164 dissolved in DMF (700 muL) was added (S)-2-aminoethyl)-1-ethylpyrrolidine (20 mg, 0.16 mmol), DIEA (27 muL, 0.16 mmol) and HBTU (44 mg, 0.12 mmol). The reaction mixture was stirred at rt for 3 h and then diluted with methanol (800 muL). The crude product was purified by HPLC and fractions containing the desired product were combined and lyophilized to afford 5 mg (20percent) of 156 as a fluffy white solid. MS (ESI(+)) m/e 677.4 (M+H)+., 22795-99-9

The synthetic route of 22795-99-9 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; Infinity Pharmaceuticals, Inc.; US2006/25460; (2006); A1;,
Chiral Catalysts
Chiral catalysts – SlideShare

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.351498-10-7,6,6′-((1E,1’E)-((2,3-Dimethylbutane-2,3-diyl)bis(azanylylidene))bis(methanylylidene))bis(2,4-di-tert-butylphenol),as a common compound, the synthetic route is as follows.

Compound Int-1a (733 mg, 1.33 mmol) was taken up in ethanol (10 mL) and the resulting suspension was heated to 80 C. and allowed to stir at this temperature for 5 minutes. Compound Int-1b (236 mg, 1.33 mmol) was then added and the resulting reaction was allowed to stir at 80 C. for an additional 2 hours. The reaction was then cooled to room temperature using in an ice bath and the reaction mixture was filtered. The collected red solid was dried under vacuum to provide compound Int-1c (579 mg, 72%)., 351498-10-7

The synthetic route of 351498-10-7 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; Merck Sharp & Dohme Corp.; Girijavallabhan, Vinay; Njoroge, F. George; Bogen, Stephane; Bennett, Frank; Verma, Vishal; Arasappan, Ashok; Chen, Kevin X.; Huang, Ying; Kerekes, Angela; Nair, Latha; Pissarnitski, Dimitri; Dang, Qun; Davies, Ian; Olsen, David B.; Stamford, Andrew; Vacca, Joseph P.; US2014/206640; (2014); A1;,
Chiral Catalysts
Chiral catalysts – SlideShare

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.141556-45-8,1,3-Dimesityl-1H-imidazol-3-ium chloride,as a common compound, the synthetic route is as follows.

Add ligand L2690mg (2.0mmol), copper powder 640mg (10.0mmol), 30 mL of water in a 50mL flask, 60 ~ 70 oil bath, the reaction was stirred for 24 hours, the reaction mixture was cooled to room temperature, filtered, the filter cake was washed 3 times with water, the filter cake dissolved in acetonitrile and filtered to remove unreacted copper powder, the solvent was evaporated under reduced pressure to give 520mg as colorless crystals, a yield of 65%.

141556-45-8, The synthetic route of 141556-45-8 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; China Petroleum & Chemical Corporation Shanghai Research Institute of Petrochemical.; Liu, Bo; Jin, Zhaosheng; Lu, Jiangang; Li, Xianming; Zhou, Haichun; (13 pag.)CN105585584; (2016); A;,
Chiral Catalysts
Chiral catalysts – SlideShare

22795-99-9, (S)-(1-Ethylpyrrolidin-2-yl)methanamine is a chiral-catalyst compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

(S)-ethyl 2-(2,6-(UfIuOrO-S-JOdOnJCOtJnOyI)-S-(Tl -ethylpyrrolidin-2-yl)methylamino)acrylateEthyl 2-(2,6-difluoro-5-iodonicotinoyl)-3-(dimethylamino)acrylate (Intermediate 37, 0.500 g, 1.10 mmol) was taken up THF (40 mL) and cooled to 0 0C for 10 min and then (S)-(I- ethylpyrrolidin-2-yl)methanamine (0.153 mL, 1.10 mmol) was added and stirred at room temperature for 2 min. The reaction mixture was quenched with sat NH4Cl diluted with EtOAc and separated, dried, and solvent removed. The residue was purified by a 0-5percent gradient on the ISCO of DCM/Methanol to give (S)-ethyl 2-(2,6-difluoro-5-iodonicotinoyl)-3- ((l-ethylpyrrolidin-2-yl)methylamino)acrylate (0.36Og, 67percent) as a red oil. MS (ES) (M+H)+: 494 for Ci8H22F2IN3O3, 22795-99-9

The synthetic route of 22795-99-9 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; ASTRAZENECA AB; ASTRAZENECA UK LIMITED; BIFULCO, Neil; CHOY, Allison, Laura; QUIROGA, Olga; SHERER, Brian; WO2010/136817; (2010); A1;,
Chiral Catalysts
Chiral catalysts – SlideShare

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.351498-10-7,6,6′-((1E,1’E)-((2,3-Dimethylbutane-2,3-diyl)bis(azanylylidene))bis(methanylylidene))bis(2,4-di-tert-butylphenol),as a common compound, the synthetic route is as follows.

In a nitrogen atmosphere, add to the reactor,2,2 ‘-[(1,1,2,2-tetramethyl-1,2-ethylenediyl) bis (nitromethyl)] bis [4,6-bis (1,1-dimethyl (Ethyl)] phenol, 16.46g (30mmol),21.6 g (152 mmol) of boron trifluoride-ether complex,300ml toluene20 g (152 mmol) of N, N-diisopropylethylamine was stirred with heating at 40 C for 2.5 hours.Cool to room temperature, add 300ml of water, and separate the filtrate into organic and aqueous layers.The organic layer was washed twice with a saturated sodium carbonate aqueous solution and dried over magnesium sulfate.The obtained solid was recrystallized from toluene (150 ml) and ethanol (750 ml),This gave 18.78 g of crude product. The crude product is under pressure 3 ¡Á 10-3Pa,Sublimation at a temperature of 225 C gave compound [69] (light yellow solid)., 351498-10-7

351498-10-7 6,6′-((1E,1’E)-((2,3-Dimethylbutane-2,3-diyl)bis(azanylylidene))bis(methanylylidene))bis(2,4-di-tert-butylphenol) 135404188, achiral-catalyst compound, is more and more widely used in various fields.

Reference£º
Patent; TORAY ADVANCED MATERIALS RESEARCH LABORATORIES (CHINA) CO., LTD.; WAN, PENG; JIN, GUANGNAN; IKEDA, TAKESHI; LI, JINCAI; TANAKA, DAISAKU; (48 pag.)TW2019/25212; (2019); A;,
Chiral Catalysts
Chiral catalysts – SlideShare

33100-27-5, 1,4,7,10,13-Pentaoxacyclopentadecane is a chiral-catalyst compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

General procedure: A solution of (2 mmol, 0.4 ml) of 15-crown-5 in (10 ml) of absolute ethanol was added to a solution of (1 mmol, 0.933 gm Pr-picrate), (0.936 gm Nd-picrate) and (0.900 gm Dy-picrate) in (10 ml) of absolute ethanol and refluxed at (50 ? 60 oC) for (1 hr.). The solution was concentrated at (40 ? 50 oC) to a very small volume (till the formation of a precipitate), usually a gummy precipitate forms which was treated with (40 ? 60 oC) petroleum ether until all the gummy precipitate was converted to a fine yellow ? orange powder. The precipitate was collected and stored in a desicator for complete dryness. These complexes were also prepared by another method, by stirring a solution of 15-crown-5 with a solution of lanthanide picrate for (24 ? 48 hrs.). The gummy precipitates were treated with petroleum ether. The yields were (92 ? 96percent)24., 33100-27-5

The synthetic route of 33100-27-5 has been constantly updated, and we look forward to future research findings.

Reference£º
Article; Al-Amery, Mohammed H. A.; Al-Abdaly, B. Ibrahim; Albayaty, M. Kahtan; Oriental Journal of Chemistry; vol. 32; 2; (2016); p. 1025 – 1048;,
Chiral Catalysts
Chiral catalysts – SlideShare

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.2133-34-8,(S)-Azetidine-2-carboxylic acid,as a common compound, the synthetic route is as follows.

Step A. N-(3,5-Dichlorobenzenesulfonyl)-2(S)-azetidinecarboxylic Acid To a magnetically stirred mixture of azetidine-2(S)-carboxylic acid (1 g, 10.5 mmol) and Na2CO3 (2.76 g, 20 mmol) in 15 mL of water at 0 C. was added 3.5-dichlorobenzenesulfonyl chloride (2.94 g, 12 mmol), and the reaction was allowed to slowly warm up to room temperature overnight. The reaction was quenched by careful addition of concentrated HCl at 0 C. (pH=ca. 2), and the product was extracted with EtOAc (3*15 mL). The extracts were dried over Na2SO4, and concentrated to dryness to provide the final productproduct as a white solid, which is >90% pure by 1H NMR and was used directly. 500 MHz 1H NMR (CD3OD): delta 2.3-2.4 (m, 2H), 3.39 (m, 1H), 3.95 (q, J=9 Hz, 1H), 4.68 (t, 1H, J=8.5 Hz), 7.62 (t, 1H, J=8 Hz), 7.73-7.70 (m, 1H), 7.79 (t, J=2 Hz, 1H), 7.84 (d, J=2 Hz, 1H)., 2133-34-8

2133-34-8 (S)-Azetidine-2-carboxylic acid 16486, achiral-catalyst compound, is more and more widely used in various fields.

Reference£º
Patent; Merck & Co., Inc.; US6645939; (2003); B1;,
Chiral Catalysts
Chiral catalysts – SlideShare

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.22795-99-9,(S)-(1-Ethylpyrrolidin-2-yl)methanamine,as a common compound, the synthetic route is as follows.

22795-99-9, The method for preparing a chiral copper-iodine complex in this embodiment is as follows: a) In a 15ml centrifuge tube, add 10ml of absolute ethanol, 0.38mg of CuI, and 300ul of (S) -2- (aminomethyl) -1-ethylpyrrolidine ((S) -2- (Aminomethyl) -1 -ethylpyrrolidine), tighten the cap of the centrifuge tube.b) Shake until the raw materials of the two are mixed uniformly, and a yellow-green phosphor can be generated by irradiating with a 254nm ultraviolet lamp.c) The raw material solution was left to stand overnight, and colorless transparent crystals were found. Decant the ethanol in the centrifuge tube and wash the crystals with n-hexane to obtain a chiral copper-iodine complex crystal with a clean surface.d) Through single crystal X-ray characterization and OLEX software data analysis, the structure information of the chiral copper-iodine complex crystal is obtained, so as to obtain the coordination mode and two-core structure between copper iodine and chiral organic molecules, and the chemical formula is ((( S) -2- (Aminomethyl) -1-ethylpyrrolidine)) 2Cu2I2

The synthetic route of 22795-99-9 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; Huazhong University of Science and Technology; Tang Jiang; Yao Li; Niu Guangda; Gao Liang; Li Jinghui; (12 pag.)CN110105378; (2019); A;,
Chiral Catalysts
Chiral catalysts – SlideShare