Tag: M.W:0-100

Rate laws may be derived directly from the chemical equations for elementary reactions. This is not the case, however, for ordinary chemical reactions.24621-61-2, name is (S)-Butane-1,3-diol, below Introduce a new synthetic route. , 24621-61-2

Example 4 : (R)-2-(3-{3-[[2-Chloro-3-(trifluoromethyl) benzyl] (2,2- diphenylethyl) amino]-1-methyl-propoxy}-phenyl) acetic acid methyl ester ; a) Toluene-4-sulfonic acid- (S)-3-hydroxy-butyl ester; To a stirring solution of (S)-1, 3-butanediol (1.0 g, 0.01 mmol) and triethylamine (1.39 g, 0.014 mmol) in dichloromethane (10 mL) at-20C was added dropwise p-toluenesulfonyl chloride and the mixture was stirred for 2 h. The reaction mixture was then warmed to RT and stirred overnight. The reaction mixture was poured into cold H2O (20 mL), and extracted three times with dichloromethane. The organic extracts were then washed with brine. The organic layer was dried over sodium sulfate, filtered, and concentrated in vacuo to give 2.6 g (96% yield) of title compound as an oil. MS (ESI) 244.8 (M+). The crude tosylat was used without further purification., 24621-61-2

A chemical reaction often occurs in steps, although it may not always be obvious to an observer. Thank you very much for taking the time to read this article. If you are also interested in other aspects of (S)-Butane-1,3-diol, CAS: 24621-61-2, you can also browse my other articles.

Reference£º
Patent; SMITHKLINE BEECHAM CORPORATION; WO2003/82802; (2003); A1;,
Synthesis and Crystal Structure of a Chiral?C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis
Chiral lanthanide(III) complexes of sulphur¨Cnitrogen¨Coxygen ligand derived from aminothiourea and sodium?D-camphor-¦Â-sulfonate

Rate laws may be derived directly from the chemical equations for elementary reactions. This is not the case, however, for ordinary chemical reactions.24621-61-2, name is (S)-Butane-1,3-diol, below Introduce a new synthetic route. , 24621-61-2

To a stirring solution of (S)-1, 3-butanediol (1.0 g, 0.01 MMOL) and triethylamine (1.39 g, 0.014 MMOL) in dichloromethane (10 mL) at-20C was added dropwise p- toluenesulfonyl chloride and the mixture was stirred for 2 h. The reaction mixture was then warmed to RT and stirred overnight. The reaction mixture was poured into cold H20 (20 mL), and extracted three times with DICHLOROMETHANE. The organic extracts were then washed with brine. The organic layer was dried over sodium sulfate, filtered, and concentrated in vacuo to give 2.6 g (96% yield) of title compound as an oil. MS (ESI) 244.8 (M+). The crude tosylat was used without further purification.

A chemical reaction often occurs in steps, although it may not always be obvious to an observer. Thank you very much for taking the time to read this article. If you are also interested in other aspects of (S)-Butane-1,3-diol, CAS: 24621-61-2, you can also browse my other articles.

Reference£º
Patent; SMITHKLINE BEECHAM CORPORATION; WO2004/43939; (2004); A1;,
Synthesis and Crystal Structure of a Chiral?C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis
Chiral lanthanide(III) complexes of sulphur¨Cnitrogen¨Coxygen ligand derived from aminothiourea and sodium?D-camphor-¦Â-sulfonate

As we all know, there are many different methods for the synthesis of a compound, and people can choose the synthesis method that suits their own laboratory according to the actual situation. 19132-06-0,(2S,3S)-Butane-2,3-diol, This compound is widely used in many fields, so it is necessary to find a new synthetic route. The downstream synthesis method of this compound is introduced below.19132-06-0

To a 500-mL, 3-necked-RBF (equipped with a H20-cooled reflux condenser and an HCl trap) was added (2s,3s)-(+)-2,3-butanediol (Aldrich; 15.00 mL, 166 mmol) and CC14 (120 mL). SOCl2, reagentplus (14.57 mL, 200 mmol) was then added drop wise via a syringe over a period of 20 min and the resulting mixture was heated to 98C for 45 min, then allowed to cool to rt. The reaction mixture was then cooled in an ice/H20 bath, MeCN (120 mL) and H20 (150 mL) were added followed by ruthenium(III) chloride (0.035 g, 0.166 mmol). Sodium periodate (53.4 g, 250 mmol) was then added slowly portion wise over 30 min. The resulting biphasic brown mixture was stirred vigorously while allowed to reach rt for a period of 1.5 h (internal temperature never increased above rt). TLC (50% EtOAc in heptanes) showed complete conversion. The crude mixture was then poured into ice H20 and extracted twice with 300 mL of Et20. The combined organic layers were washed once with 200 mL of sat. sodium bicarbonate, washed once with 200 mL of brine, dried over Na2S04; and concentrated by rotary evaporation to give (4S,5S)-4,5-dimethyl-l,3,2- dioxathiolane 2,2-dioxide (21.2 g, 139 mmol) as a red oil.

If you are interested in these compounds, you can also browse my other articles.Thank you for taking the time to read this article. I hope you enjoyed it, (2S,3S)-Butane-2,3-diol.

Reference£º
Patent; AMGEN INC.; BROWN, Sean P.; LI, Yunxiao; LIZARZABURU, Mike Elias; LUCAS, Brian S.; PARAS, Nick A.; TAYGERLY, Joshua; VIMOLRATANA, Marc; WANG, Xianghong; YU, Ming; ZANCANELLA, Manuel; ZHU, Liusheng; GONZALEZ BUENROSTRO, Ana; LI, Zhihong; (279 pag.)WO2016/33486; (2016); A1;,
Synthesis and Crystal Structure of a Chiral?C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis
Chiral lanthanide(III) complexes of sulphur¨Cnitrogen¨Coxygen ligand derived from aminothiourea and sodium?D-camphor-¦Â-sulfonate

Adding a certain compound to certain chemical reactions, such as: 4254-15-3,(S)-Propane-1,2-diol, can increase the reaction rate and produce products with better performance than those obtained under traditional synthetic methods. Here is a downstream synthesis route of the compound 4254-15-3,4254-15-3

To a solution of (S)-1,2-propanediol (20.0 g, 0.263 mol), triethylamine (31.9 g, 0.315 mol), 4-dimethylaminopyridine (1.28 g, 10.5 mmol) in CH2Cl2 (200 mL) was added tert-butyldimethylsiloxy chloride (47.3 g, 0.315 mol) at 22 C. The mixture was allowed to stir for 18 h. The mixture was diluted with CH2Cl2, washed with water and sat. aqueous NH4Cl. The organic solution was dried over Na2SO4, filtered and concentrated under reduced pressure. Silica gel chromatography (5% ethyl acetate/hexanes) of the concentrate gave 45.0 g of the title compound as a clear oil in 90% yield.

According to the analysis of related databases, 4254-15-3, the application of this compound in the production field has become more and more popular.

Reference£º
Patent; Bristol-Myers Squibb Company; Merck & Co. Inc.; US6967196; (2005); B1;,
Synthesis and Crystal Structure of a Chiral?C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis
Chiral lanthanide(III) complexes of sulphur¨Cnitrogen¨Coxygen ligand derived from aminothiourea and sodium?D-camphor-¦Â-sulfonate

In the chemical reaction process,reaction time,type of solvent,can easily affect the result of the reaction, thereby determining the yield and properties of the reaction product.An updated downstream synthesis route of 4254-15-3,(S)-Propane-1,2-diol, as follows.4254-15-3

Example 18C N-[(2Z)-3-butyl[1,3]thiazolo[4,5-c]pyridin-2(3H)-ylidene]-2-{[(2S)-2-hydroxypropyl]oxy}-5-(trifluoromethyl)benzamide (S)-propane-1,2-diol (52 mg, 0.68 mmol) in THF (1 mL) was treated with NaH (60percent dispersion; 27 mg, 0.68 mmol) at room temperature for 20 minutes. The mixture was cooled to 0¡ã C. and a solution of Example 18B (90 mg, 0.23 mmol) in THF (1 mL) was added. The mixture was allowed to warm to room temperature, and stirred for 4 hours. The mixture was diluted with saturated aqueous NaHCO3 (20 mL) and extracted with ethyl acetate (2.x.30 mL). The combined organic extracts were dried over anhydrous Na2SO4, filtered, and concentrated. The residue was purified by column chromatography using an Analogix.(R). Intelliflash280.(TM). (SiO2, 0-100percent ethyl acetate in hexanes) to afford 19 mg (19percent) of the title compound. 1H NMR (500 MHz, CDCl3) delta ppm 1.04 (t, J=7.48 Hz, 3H) 1.28 (d, J=6.41 Hz, 3H) 1.47-1.59 (m, 2H) 1.88-1.98 (m, 2H) 3.87 (t, J=8.85 Hz, 1H) 4.21-4.31 (m, 1H) 4.35 (dd, J=9.15, 2.75 Hz, 1H) 4.51-4.59 (m, 2H) 7.12 (d, J=8.85 Hz, 1H) 7.72 (dd, J=8.54, 2.14 Hz, 2H) 8.51 (d, J=1.83 Hz, 2H) 8.75 (s, 1H); MS (DCI/NH3) m/z 454 (M+H)+.

At the same time, in my other blogs, there are other synthetic methods of this type of compound, (S)-Propane-1,2-diol, and friends who are interested can also refer to it.

Reference£º
Patent; ABBOTT LABORATORIES; US2011/144165; (2011); A1;,
Synthesis and Crystal Structure of a Chiral?C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis
Chiral lanthanide(III) complexes of sulphur¨Cnitrogen¨Coxygen ligand derived from aminothiourea and sodium?D-camphor-¦Â-sulfonate

4254-15-3,A common heterocyclic compound, 4254-15-3,(S)-Propane-1,2-diol, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc., below Introduce a new synthetic route.

General procedure: A 45percent solution of hydrogen bromide in acetic acid (33.0 g, 23.2 mL) was added dropwise over 10 min to 60.3 mmol optically active diol 4a-f with stirring and ice-cooling. The solution was stirred at 0 ¡ãC for 5 min, and next at room temperature for 45 min. Next, water (100 mL) was added, and the mixture was alkalized to pH 8 with solid Na2CO3. The solution was immediately extracted with ethyl ether (5 .x. 60 mL), and the combined extracts were dried over anhydrous Na2SO4. The ether was evaporated, and the product was distilled under reduced pressure or purified by silica gel column chromatography with gradient AcOEt-hexane 9:1.

The chemical industry reduces the impact on the environment during synthesis, 4254-15-3,(S)-Propane-1,2-diol,I believe this compound will play a more active role in future production and life.

Reference£º
Article; Poterala, Marcin; Plenkiewicz, Jan; Tetrahedron Asymmetry; vol. 22; 3; (2011); p. 294 – 299;,
Synthesis and Crystal Structure of a Chiral?C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis
Chiral lanthanide(III) complexes of sulphur¨Cnitrogen¨Coxygen ligand derived from aminothiourea and sodium?D-camphor-¦Â-sulfonate

Each compound has different characteristics, and only by selecting the characteristics of the compound suitable for a specific situation can the compound be applied on a large scale. (S)-Butane-1,3-diol,24621-61-2, This compound has unique chemical properties. The synthetic route is as follows.,24621-61-2

Production of (S)-3-Hydroxy-1-(p-toluenesulfonyloxy)butane In the same manner as in the first step of Production Example 32, the desired compound (77.5 g) was obtained as light brown oil from (S)-1,3-butanediol (30.0 g) and p-toluenesulfonyl chloride (69.8 g). The thus-obtained oil was immediately subjected to the next step.

While traditionally a conservative industry, chemical producers will need to modernize their PR strategies to stay relevant.we look forward to future research findings about 24621-61-2.

Reference£º
Patent; Fujisawa Pharmaceutical Co., Ltd.; US6420409; (2002); B1;,
Synthesis and Crystal Structure of a Chiral?C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis
Chiral lanthanide(III) complexes of sulphur¨Cnitrogen¨Coxygen ligand derived from aminothiourea and sodium?D-camphor-¦Â-sulfonate

24621-61-2 A common heterocyclic compound, 24621-61-2,(S)-Butane-1,3-diol, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc., below Introduce a new synthetic route.

Triethylamine (1.173 g) is added dropwise to a solution of 2.246 g triisopropylchlorosilane and 1 g (S)-(+)-1,3-butanediol in 15 ml of dry tetrahydrofuran. The mixture is stirred for 48 hours at room temperature, then is diluted with 400 ml of tert-butyl methyl ether and washed respectively with 30 ml 1N HCl, 50 ml water and 50 ml of brine. The organic phase is dried (sodium sulphate), filtered and evaporated to dryness. The residue is purified by means of flash column chromatography (SiO2 60F) to provide the title compound as a colorless oil. Rf=0.31 (EtOAc-heptane 1:5).

Chemical properties determine the actual use. Each compound has specific chemical properties and uses. We look forward to more synthetic routes in the future to expand 24621-61-2 reaction routes.

Reference£º
Patent; Herold, Peter; Mah, Robert; Stutz, Stefan; Tschinke, Vincenzo; Schumacher, Christoph; Stojanovic, Aleksandar; Jotterand, Nathalie; Behnke, Dirk; US2007/167433; (2007); A1;,
Synthesis and Crystal Structure of a Chiral?C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis
Chiral lanthanide(III) complexes of sulphur¨Cnitrogen¨Coxygen ligand derived from aminothiourea and sodium?D-camphor-¦Â-sulfonate

A common heterocyclic compound, 4254-15-3,(S)-Propane-1,2-diol, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc., below Introduce a new synthetic route. 4254-15-3

Zu einer Loesung von 1.50 g (19.7 mmol) S-1, 2-Propandiol in 15 ml Dichlormethan werden 2.75 ml (19.7 mmol) Triethylamin, 0. 10 g (0. 8 MMOL) 4-N, N-Dimethylaminopyridin und 2. 97 G (19.7 mmol) tert. -Butyldimethylsilylchlorid gegeben. Die Reaktionsmischung wird fuer 16 h bei Raumtemperatur geruehrt. Anschliessend wird mit Dichlormethan verduennt und je zweimal mit Wasser, gesaettigter Ammoniumchlorid-Loesung und gesaettigter Natriumhydrogencarbonat-Loesung gewaschen. Die organische Phase wird ueber Natriumsulfat getrocknet und im Vakuum vom Loesungsmittel befreit. Der Rueckstand wird ohne weitere Reinigung in der naechsten Stufe eingesetzt. Ausbeute : 2.55 g, 80% Reinheit (54% d. Th.) GC/MS (Methode 6) : RT = 2.62 min., M/Z = 191 (M+H)+., 4254-15-3

This compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,(S)-Propane-1,2-diol,4254-15-3,its application will become more common.

Reference£º
Patent; BAYER HEALTHCARE AG; WO2004/80952; (2004); A1;,
Synthesis and Crystal Structure of a Chiral?C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis
Chiral lanthanide(III) complexes of sulphur¨Cnitrogen¨Coxygen ligand derived from aminothiourea and sodium?D-camphor-¦Â-sulfonate

A common heterocyclic compound, 24621-61-2,(S)-Butane-1,3-diol, its traditional synthetic route has been very mature, but the traditional synthetic route has various shortcomings, such as complicated route, low yield, poor purity, etc., below Introduce a new synthetic route. 24621-61-2

Example 25 (4-{(R)-3-[(2-CHLORO-3-TRIFLUOROMETHYL-BENZYL)-2, 2-DIPHENYLETHYL-AMINO]-BUTOXY}-INDOL-1- YL) acetic acid hydrochloride salt a) Toluene-4-sulfonic acid (S)-3-hydroxy-butyl ester To a solution of (S)-1, 3-butanediol (2.0 g, 22.0 MMOL) and Et3N (4.6 mL, 33.0 MMOL) in CH2CI2 (20 mL) at-20 C was added p-toluenesulfonyl chloride (4.46 g, 23.0 MMOL) and the reaction mixture was then warmed to RT and stirred overnight. The reaction mixture was washed with H20 and brine, dried over NA2SO4, filtered, and concentrated to give the title compound as a yellow oil (5.2 G, 96%)a) Toluene-4-sulfonic acid (S)-3-hydroxy-butyl ester To a solution of (S)-1, 3-butanediol (2.0 G, 22.0 MMOL) and Et3N (4.6 mL, 33.0 MMOL) in CH2CI2 (20 mL) at-20 C was added p-toluenesulfonyl chloride (4.46 g, 23.0 MMOL) and the reaction mixture was then warmed to RT and stirred overnight. The reaction mixture was washed with H20 and brine, dried over NA2SO4, filtered, and concentrated to give the title compound as a yellow oil (5.2 G, 96%), 24621-61-2

The chemical industry reduces the impact on the environment during synthesis, 24621-61-2,(S)-Butane-1,3-diol,I believe this compound will play a more active role in future production and life.

Reference£º
Patent; SMITHKLINE BEECHAM CORPORATION; WO2005/23196; (2005); A2;,
Synthesis and Crystal Structure of a Chiral?C3-Symmetric Oxygen Tripodal Ligand and Its Applications to Asymmetric Catalysis
Chiral lanthanide(III) complexes of sulphur¨Cnitrogen¨Coxygen ligand derived from aminothiourea and sodium?D-camphor-¦Â-sulfonate