Category: alcohols-buliding-blocks

The major producers of chemicals have been the Europe, Japan and China. Due to the growing call for a cleaner, greener environment, people will have to find innovative ways to maintain their relevance. Here is a compound 111-32-0, name is 4-Methoxybutan-1-ol. This compound has unique chemical properties. The synthetic route is as follows. HPLC of Formula: C5H12O2

Preparation 1-a; 4-Methoxy-butyraldehvde; To an orange suspension of PCC (60 g) in CH2CI2 (700 mL) was added 4- methoxybutan-1-ol (17 g) slowly at 250C. The resulting brown suspension was stirred at 250C for 3.5 h. The reaction mixture was diluted with 1.5 L Et2O and violently stirred at 250C for 10 min. The resulting grey suspension was filtered through celite. The reaction container was washed with 2 x 200 mL Et2O. The organic solutions were combined and passed through celite again. The filtrate was concentrated and the residue was columned on silica gel using 1 :1 hexane/EtOAc to afford 11.0 g of the desired product in 66% yield as colorless oil.

With the rapid development of chemical substances, we look forward to future research findings about 111-32-0.

Reference:
Patent; PFIZER INC.; WO2009/7814; (2009); A1;,
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Adding a certain compound to certain chemical reactions, such as: 623-04-1, (4-Aminophenyl)methanol, 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, 623-04-1, blongs to alcohols-buliding-blocks compound. Computed Properties of C7H9NO

A solution of Fmoc-Leu-OH (2.0 g, 5.7 mmol), PABA (0.7 g, 5.7 MMOL), and EEDQ (1.4 g, 6.3 mmol) in 1: 1 toluene: ethanol (30 ML) was stirred at room temperature under nitrogen for 3 days. Additional PABA (0.14 g, 1.1 mmol) was added and the reaction was stirred for another 18 hours. Additional EEDQ (0.4 g, 1.9 mmol) was added and the reaction was stirred for another 2 hours, and concentrated. The resulting residue was dissolved in dichloromethane (20 ML), washed consecutively with 1N HC1 (3 x 20 mL), saturated NAHC03 (3 x 20 mL), and brine (20 mL), dried (MGS04), and concentrated. The resulting solid was purified by flash chromatography on silica gel, eluting with 50: 1 dichloromethane : methanol to give the title compound as a colorless solid (2.03 g, 78%).

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,623-04-1, its application will become more common.

Reference:
Patent; BRISTOL-MYERS SQUIBB COMPANY; WO2005/23314; (2005); A1;,
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Adding a certain compound to certain chemical reactions, such as: 1113-21-9, 3,7,11,15-Tetramethylhexadeca-1,6,10,14-tetraen-3-ol, 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, Recommanded Product: 3,7,11,15-Tetramethylhexadeca-1,6,10,14-tetraen-3-ol, blongs to alcohols-buliding-blocks compound. Recommanded Product: 3,7,11,15-Tetramethylhexadeca-1,6,10,14-tetraen-3-ol

Example 5: 5E,9E,13E-Geranylgeranyl Acetone Synthesis[0141] Alternative synthesis of 5-trans Isomer: 5E,9E,13E-Geranylgeranyl acetone 1: The alternative synthesis of 5E,9E,13E-geranylgeranyl acetone 1 can be achieved as shown in the scheme-5.Scheme 5:[0142] The 5E, 9E, 13E-geranyl geranyl acetone (1) can be prepared by reacting 6E-10E- geranyl linalool (23) with diketene (24) catalyzed by DMAP in ethyl ether to give the ester 25. The ester 25 in the Carroll rearrangement using Al(OiPr)3 at elevated temperature can afford the desired 5E, 9E, 13E-geranyl geranyl acetone (1). In another approach, the GGA (1) can be prepared by treating geranyl linalool (23) with the Meldrum’s acid 26 in the Carroll rearrangement using Al(OiPr)3 at 160 C. Similarly, the use of tert-butyl acetoacetate (27) with geranyl linalool (23) in the Carroll rearrangement can also give the desired 5E, 9E, 13E-geranyl geranyl acetone (1).

The synthetic route of 1113-21-9 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; COYOTE PHARMACEUTICALS, INC.; BARRES, Ben A.; NAKAYAMA, Naoki; SERIZAWA, Hiroaki; ARGADE, Ankush B.; WO2012/31028; (2012); A2;,
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Electric Literature of 14002-80-3, With the rapid development and complex challenges of chemical substances, the synthesis of new drugs is usually one of the most effective ways to increase yield.14002-80-3, name is Methyl 3-hydroxy-2,2-dimethylpropanoate, molecular formula is C6H12O3, molecular weight is 132.16, as common compound, the synthetic route is as follows.

EXAMPLE 20a; Preparation of intermediate 2,2-dimethyl-3-(toluene-4-sulfonyloxy)-propionic acid methyl ester; To a mixture of 3-hydroxy-2,2-dimethyl-propionic acid methyl ester (13.2 g, 0.1 mol), K2CO3 (20 g, 0.14 mol) and DMAP (6.2 g, 0.05 mol) in DCM (100 mL) was added p-toluenesulfonyl chloride (19 g, 0.1 mol). The mixture was stirred at room temperature overnight, then filtered. The filtrate was washed with HCl aq. (1 M) and water, dried over anhydrous Na2SO4 and concentrated to give the title compound (15 g).

The chemical industry reduces the impact on the environment during synthesis 14002-80-3, I believe this compound will play a more active role in future production and life.

Reference:
Patent; Chen, Li; Han, Xingchun; He, Yun; Yang, Song; Zhang, Zhuming; US2009/163512; (2009); A1;,
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Related Products of 329218-12-4, 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 329218-12-4 as follows.

To a stirred solution of 4-chloro-3-bromophenyl-methanol (cited in Amgen patent WO03099776) (900 mg, 4.06 mmol) in 2-methyl-tetrahydrofuran (15 ml) was added potassium hydroxide (912 mg, 16.3 mmol) and the resulting suspension was stirred at room temperature for 30 minutes, lodomethane (1.01 ml, 4.00 mmol) was then added and the reaction was stirred for 16 hours at room temperature. LCMS indicated incomplete reaction. Potassium hydroxide (912 mg, 16.3 mmol) was added and the resulting mixture stirred for 5 minutes before adding further iodomethane (4.04 ml, 16 mmol) and stirring was continued for 3 hours at room temperature. Ethyl acetate (60 ml) and saturated brine solution (30 ml) were added and the layers were separated. The organic extract was further washed with saturated brine solution (2 x 30 ml) then dried over anhydrous MgSO4 (s), filtered and evaporated in vacuo to afford the crude title compound as a yellow oil (901 mg, 94%).1HNMR (CZ6-DMSO): 3.40 (s, 3H), 4.21 (s, 2H), 5.50 (br s, 2H), 7.21 (dd, 1 H), 7.42 (d, 1 H), 7.60 (s, 1 H).

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,329218-12-4, its application will become more common.

Reference:
Patent; PFIZER LIMITED; WO2008/135826; (2008); A2;,
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Related Products of 3279-95-6, The major producers of chemicals have been the Europe, Japan and China. Due to the growing call for a cleaner, greener environment, people will have to find innovative ways to maintain their relevance. Here is a compound 3279-95-6, name is 2-(Aminooxy)ethanol. This compound has unique chemical properties. The synthetic route is as follows.

A solution of (86.2) (120 mg, 0.287 mmol) and 2-(aminooxy)ethanol (44.2 mg, 0.573 mmol) in MeOH (10 ml) was added drops of HCl (3 N) to reach pH about 5 and then stirred at rt for overnight. Solvent was evaporated and the residue was purified by preparative base HPLC (gradient eluent A B from 20/80 to 95/5. mobile phase A: NH4OH/CH3CN 0.05%; mobile phase B: NH4OH/H20 0.05%) to afford the title compound (20 mg, yield 15%).

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 3279-95-6, 2-(Aminooxy)ethanol.

Reference:
Patent; NOVARTIS AG; CHEN, Chao; DENG, Haibing; GUO, Haibing; HE, Feng; JIANG, Lei; LIANG, Fang; MI, Yuan; WAN, Huixin; XU, Yao-Chang; YU, Hongping; ZHANG, Ji Yue (Jeff); WO2013/38362; (2013); A1;,
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Synthetic Route of 7397-62-8, The major producers of chemicals have been the Europe, Japan and China. Due to the growing call for a cleaner, greener environment, people will have to find innovative ways to maintain their relevance. Here is a compound 7397-62-8, name is Butyl 2-hydroxyacetate. This compound has unique chemical properties. The synthetic route is as follows.

The esterification of metharylic acid with BG was done by carbonyl diimidazole coupling. 1 Eq. of methacrylic acid was charged into suitable sized round bottom flask (RBF) with a stir bar. 10 volumes of dichloromethane was then added to it. RBF was then sealed with a rubber septa and the mixture of methacrylic acid and dichloromethane was then flushed with N2 for 5 minutes. The RBF was then placed in an ice bath until the contents cooled down to 0C. Then CDI was then added to the reaction through the mouth of the RBF by removing the septa. Frothing was observed in the reactor. Once the frothing stopped, the reaction vessel was sealed by rubber septa and butyl glycolate was added using a syringe. The ice bath was removed and the reaction allowed to run at room temperature. It was followed by thin layer chromatography (TLC) on silica using 2% isopropanol/98% chloroform and separately using chloroform/methanol/acetic acid (CMA) 98: 2:2. No spot for carbonyl diimidazole was observed after 2.5 hrs. The spot for the compound overlaps with that of carbonyl diimidazole in the TLC done using 2% isopropanol, but a distinct spot was seen for the compound in the TLC done with CMA. Once the reaction was complete, the solvent was removed in vacuo and the sample was purified by column chromatography. The yield was approximately 20%.

According to the analysis of related databases, 7397-62-8, the application of this compound in the production field has become more and more popular.

Reference:
Patent; THE UNIVERSITY OF UTAH RESEARCH FOUNDATION; WO2005/97210; (2005); A1;,
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Reference of 616-29-5, Adding some certain compound to certain chemical reactions, such as: 616-29-5, name is 1,3-Diaminopropan-2-ol,molecular formula is C3H10N2O, 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 616-29-5.

1,3-diaminopropan-2-ol (3 g, 0.033 mol) was dissolved in methanol (300 ml) followed by the addition of triethylamine (33 ml dropwise) and di-tert-butyl dicarbonate [(BOC)2O] (21.793 g, 0.100 mol). The reaction medium was heated at 40-50 C. for 20 min then stirred at room temperature for 1 hour. After evaporation of the solvent, the colorless oil residue was purified by chromatography on silica gel (eluent: dichloromethane/methanol 95:5). The reaction yielded a colorless oil which crystallized slowly. Yield: quantitative Rf (dichloromethane/methanol 95:5): 0.70 IR: nuNH 3368 cm-1; nuCO carbamate 1690 cm-1 MP: 98-100 C. NMR (1H, CDCl3): 1.45 (multiplet, 18H, -CH3- (BOC)); 3.02 (sl, 1H, OH); 3.15-3.29 (multiplet, 4H, BOCNH-CH2-CH-CH2-NHBOC); 3.75 (m, 1H, BOCNH-CH2-CH-CH2-NHBOC); 5.16 (multiplet, 2H, -NHBOC). MS (MALDI-TOF): M+1=291 (M+H+); M+23=313 (M+Na+); M+39=329 (M+K+)

According to the analysis of related databases, 616-29-5, the application of this compound in the production field has become more and more popular.

Reference:
Patent; Darteil, Raphael; Caumont-Bertrand, Karine; Najib, Jamila; US2006/69156; (2006); A1;,
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With the rapid development and complex challenges of chemical substances, the synthesis of new drugs is usually one of the most effective ways to increase yield.1117-86-8, name is 1,2-Octanediol, molecular formula is C8H18O2, molecular weight is 146.23, as common compound, the synthetic route is as follows.category: alcohols-buliding-blocks

General procedure: The reactions were performed in a 50 ml autoclave with a Teflon vessel inside equipped with magnetic stirring under 3.0 MPa CO2. After introducing DBU (60.8 mg, 0.4 mmol), propylene glycol (76.1 mg, 1 mmol), 2-methyl-3-butyn-2-ol (126.2 mg, 1.5 mmol), DMF (2 ml), the autoclave was sealed and filled with CO2 to keep thepressure of CO2 under 3.0 MPa. Then, the reaction mixture was stirred at 120 C for 10 h. When the reaction completed, the autoclave was cooled to ambient temperature and residual CO2 was carefully released. Subsequently, the mixture was flushed with DMF and analyzed by GC using biphenyl as an internal standard.

At the same time, in my other blogs, there are other synthetic methods of this type of compound,1117-86-8, 1,2-Octanediol, and friends who are interested can also refer to it.

Reference:
Article; Han, Li-Hua; Li, Jing-Yuan; Song, Qing-Wen; Zhang, Kan; Zhang, Qian-Xia; Sun, Xiao-Fang; Liu, Ping; Chinese Chemical Letters; vol. 31; 2; (2020); p. 341 – 344;,
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With the rapid development and complex challenges of chemical substances, the synthesis of new drugs is usually one of the most effective ways to increase yield.18776-12-0, name is 3-Chloro-1-phenylpropan-1-ol, molecular formula is C9H11ClO, molecular weight is 170.64, as common compound, the synthetic route is as follows.Quality Control of 3-Chloro-1-phenylpropan-1-ol

General procedure: To starting material 9 or 10, respectively (1 mmol) was added 48% aqueous HBr (3 mL) and the mixture was stirred for 3h at room temperature. Thereafter, the solution was poured into a mixture of K2CO3 (1 g) in ice (5.5 g) and additional solid K2CO3 was added for neutralization (pH 7). The crude reaction product was extracted with diethyl ether, the combined organic layers were dried with MgSO4 and evaporated to dryness. The crude product was employed directly in the subsequent reaction step without further purification.

At the same time, in my other blogs, there are other synthetic methods of this type of compound,18776-12-0, 3-Chloro-1-phenylpropan-1-ol, and friends who are interested can also refer to it.

Reference:
Article; Neudorfer, Catharina; Seddik, Amir; Shanab, Karem; Jurik, Andreas; Rami-Mark, Christina; Holzer, Wolfgang; Ecker, Gerhard; Mitterhauser, Markus; Wadsak, Wolfgang; Spreitzer, Helmut; Molecules; vol. 20; 1; (2015); p. 1712 – 1730;,
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