Tag: M.W=100-200

Electric Literature of 41790-30-1, 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. 41790-30-1, name is (5,6,7,8-Tetrahydronaphthalen-1-yl)methanol, molecular formula is C11H14O, The 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.

Step 2 – Tetralin-5-carbaldehyde (0543) [00350] To a solution of tetralin-5-ylmethanol (7.20 g, 44.3 mmol) in dichloromethane (100 mL) was added manganese dioxide (19.2 g, 221 mmol) under a nitrogen atmosphere. The mixture was stirred at 20 C for 6 hrs. On completion, the mixture was filtered; the filtrate was concentrated in vacuo to afford a residue. The residue was purified with silica gel chromatography (petroleum ether:ethyl acetate = 20:1) to afford the title compound. 1H NMR (400MHz, DMSO-d6) delta = 10.23 (s, 1H), 7.65 (dd, J = 1.1, 7.4 Hz, 1H), 7.41 – 7.35 (m, 1H), 7.35 – 7.29 (m, 1H), 3.15 (t, J = 6.1 Hz, 2H), 2.79 (t, J = 6.0 Hz, 2H), 1.79 – 1.69 (m, 4H).

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 41790-30-1, (5,6,7,8-Tetrahydronaphthalen-1-yl)methanol.

Reference:
Patent; RAZE THERAPEUTICS, INC.; MAINOLFI, Nello; MOYER, Mikel P.; SAIAH, Eddine; (264 pag.)WO2017/156181; (2017); A1;,
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Synthetic Route of 928-92-7, 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 928-92-7 as follows.

Example 5; Methyl 5-methyl-3,4-dihydro-2H-pyrano [2,3-c] pyridine-6-carboxylate(a) (is)-Methyl 2-((2-(hex-4-en-l-yloxy)-2-oxoethyl)amino)-2-oxoacetateTo a vessel maintained at 40 ¡ãC was charged CDI (2.75 g, 0.95 eq) and TBME (9 mL). To this mixture was added with stirring a solution of N-(?-butoxycarbonyl)glycine (3.1 g, 1.0 eq) dissolved in TBME (12 mL) over 30 min. Stirring was continued for an additional 30 min, whereupon trans-4-hexen-l-ol (1.7 g, 0.95 eq) was added over 30 min. The mixture was maintained with stirring at 40 ¡ãC for an additional 3.5 h, then cooled to ambient temperature and stirred a further 14 h. The mixture was washed with IN HQ (2 x 7.8 mL) then water (1 x 7.8 mL). The organic layer was dried over a2S04, filtered and concentrated to give (.pound.)-hex-4-en-l-yl 2-((tert-butoxycarbonyl)amino)acetate as an oil. The oil was dissolved in DCM (12 mL) and 4.0 M HC1 in dioxane (2.8 mL) was added drop-wise. The mixture was stirred at ambient temperature for 1.5 h then the mixture was heated to 35 ¡ãC and stirred for 3 h. 4.0 M HC1 in dioxane (2.8 mL) was added drop-wise. After 6 h at 35 ¡ãC a further dose of 4.0 M HC1 in dioxane (2.8 mL) was added drop-wise and the mixture was stirred for a further 4 h. The mixture was cooled to ambient temperature and the solvent was removed under reduced pressure. A portion of the residue (1.0 g) was dissolved in DCM (8 mL) and methyl 2-chloro-2-oxoacetate (0.63 g) was added. Triethylamine (1.0 g) was added drop-wise over 20 min. The mixture was stirred for 1 h before being quenched by IN HC1 (2.5 mL) to form a biphasic mixture. The layers were separated and the organic layer was washed with IN HCl (1 x 2.5 mL), water (1 x 2.5 mL) and concentrated under reduced pressure to provide an oil. Flash columnchromatography (S1O2, 10->60percent EtO Ac/Hex gradient) provided the title compound as an oil as a 95:5 mixture of trans:cis isomers. XH NMR (300 MHz, CDCI3) delta ppm 7.57 (s, 1 H), 5.31-5.55 (m, 2 H), 4.17 (t, J=6.69 Hz, 2 H), 4.12 (d, J=5.51 Hz, 2 H), 3.92 (s, 3 H), 1.97-2.10 (m, 2 H), 1.67-1.77 (m, 2 H), 1.62-1.67 (m, 3 H); 13C NMR (75 MHz, CDCI3) delta ppm 168.60, 160.35, 156.28, 129.49, 126.12, 65.34, 53.68, 41.47, 28.62, 28.17, 17.84; HRMS (M+H) m/z, calcd for CnH18N05, 244.1185; found 244.1 187.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,928-92-7, its application will become more common.

Reference:
Patent; GLAXO GROUP LIMITED; SISKO, Joseph; MANS, Douglas; YIN, Hao; WO2012/12391; (2012); A2;,
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Synthetic Route of 3236-48-4, Researchers who often do experiments know that organic synthesis is a process of preparing more complex target molecules from simple raw materials through one or more chemical reactions. Generally, it requires fewer steps,and cheap raw materials. 3236-48-4, name is trans-1,4-Cyclohexanedimethanol. A new synthetic method of this compound is introduced below.

REFERENCE EXAMPLE 23 Trans-4-benzyloxymethyl-1-hydroxymethylcyclohexane In 10 ml of tetrahydrofuran was suspended 1.51 g of sodium hydride (55percent content), and a solution of 5.0 g of trans-1,4-dihydroxymethylcyclohexane dissolved in 20 ml of tetrahydrofuran was added dropwise thereto with stirring under ice-cooling, and the reaction mixture was stirred at room temperature for 50 minutes. To the reaction mixture was added 3.79 ml of benzyl bromide with stirring under ice-cooling and the mixture was stirred under ice-cooling for 1 hour and further at room temperature overnight. The insolubles were separated by filtration and the filtrate was concentrated under reduced pressure. The residue was dissolved in ethyl acetate, and the solution was washed successively with an aqueous sodium chloride solution, 10percent aqueous hydrochloric acid solution, an aqueous sodium chloride solution and an aqueous sodium bicarbonate solution and dried over anhydrous magnesium sulfate. The solvent was distilled off under reduced pressure. The residue was purified by silica gel column chromatography (eluding solvent: cyclohexane/ethyl acetate=20/1-5/1) to obtain 1.75 g of the desired compound as a colorless oil. NMR spectrum (CDCl3) delta ppm: 0.85-1.08(4H,m), 1.18-1.30(1H,m), 1.35-1.68(2H,m), 1.72-1.95(4H,m), 3.29(2H,d,J=6.6 Hz), 3.46(2H,t,J=5.3 Hz), 4.50(2H,s), 7.20-740(5H,m)

At the same time, in my other blogs, there are other synthetic methods of this type of compound,3236-48-4, trans-1,4-Cyclohexanedimethanol, and friends who are interested can also refer to it.

Reference:
Patent; Sankyo Company, Limited; US5843973; (1998); A;,
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Related Products of 62058-03-1 ,Some common heterocyclic compound, 62058-03-1, molecular formula is C10H17NO, 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.

A mixture of 2,5-dihydro-2,5-dimethoxy- furan (0.01 mol) and 4-amino-, (la,3a,4a,5i,7a)- tricyclo[3.3.1. 13,7]decan-l-ol (0.01 mol) in water (50 ml) was stirred at room temperature. Hydrochloric acid concentrated (2 ml) was added and the reaction mixture was stirred overnight. The acidic mixture was neutralized with an aqueous NaHC03 solution. This mixture was extracted with DCM (3 x). The combined organic layers were dried, filtered and the solvent evaporated, yielding 1.5 g of intermediate 13.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,62058-03-1, its application will become more common.

Reference:
Patent; JANSSEN PHARMACEUTICA N.V.; WO2005/108361; (2005); A1;,
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Researchers who often do experiments know that organic synthesis is a process of preparing more complex target molecules from simple raw materials through one or more chemical reactions. Generally, it requires fewer steps,and cheap raw materials. 3068-00-6, name is 1,2,4-Butanetriol. A new synthetic method of this compound is introduced below., Product Details of 3068-00-6

General procedure: Xantphos (28.9 mg, 0.05 mmol), Cs2CO3 (32.6 mg, 0.10 mmol) and [Ru(p-cymene)Cl2]2 (15.3 mg, 0.025 mmol) were added to a Schlenk tube. Then the tube was evacuated and refilled with nitrogen. Dry toluene as solvent (2.0 mL)were added and the solution was stirred at room temperature under nitrogen for 30 min. Activated molecular sieves 4A (0.10 g) and triol 6a (106.1 mg, 1.00 mmol) were then added. And the solution was stirred at room temperature under nitrogen for 40 min. Subsequently, aniline 5a (46.6 mg, 0.50 mmol) was added and the solution was stirred at room temperature under nitrogen for 20 min. Then the resulting solution was heated to reflux and stirred for 48 h. The reaction was monitored by TLC. After completion, the solution was filtered through a plug of Celite and washed with EtOAc (3 mL x 3). The filtrate was concentrated under vacuum. Purification via flash column chromatography with silica gel (eluting with PE/EA = 5/1 (v/v)) yielded 4a (43.0 mg, 81% yield) as light yellow 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, 3068-00-6, 1,2,4-Butanetriol.

Reference:
Article; Xu, Qing-Song; Li, Chen; Xu, Yong; Xu, Defeng; Shen, Mei-Hua; Xu, Hua-Dong; Chinese Chemical Letters; (2019);,
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Application of 3973-18-0 ,Some common heterocyclic compound, 3973-18-0, molecular formula is C5H8O2, 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.

To a stirred solution of 2-(prop-2-yn-1-yloxy)ethanol (7.90 g, 78.9 mmol) in DCM (80.0 mL) was added TEA (15.9 g, 158 mmol) followed by the addition of a solution of methanesulfonyl chloride (13.6 g, 119 mmol) at 0 C under nitrogen atmosphere. The resulting solution was stirred for additional 2 h at room temperature. Upon completion, the reaction was quenched with water (100 mL) at 0 C. The mixture was extracted with EtOAc (2 x 100 mL). The combined organic phase was washed with brine (100 mL), dried with anhydrous Na2SO4 and filtered. The filtrate was concentrated under reduced pressure to afford 2-(prop-2-yn-1-yloxy)ethyl methanesulfonate (14.0 g, 99 %) as a colorless oil. 1H NMR (400 MHz, DMSO-d6) d 4.37-4.28 (m, 2H), 4.21 (d, J = 2.4 Hz, 2H), 3.76-3.63 (m, 2H), 3.53-3.42 (m, 1H), 3.19 (s, 3H).

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route,3973-18-0, its application will become more common.

Reference:
Patent; KYMERA THERAPEUTICS, INC.; JI, Nan; MAINOLFI, Nello; WEISS, Matthew; (977 pag.)WO2020/10210; (2020); A1;,
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Adding a certain compound to certain chemical reactions, such as: 3637-61-4, Cyclopentanemethanol, 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: Cyclopentanemethanol, blongs to alcohols-buliding-blocks compound. Recommanded Product: Cyclopentanemethanol

Methanesulfonyl chloride (13.8 mL, 178 mmol) was added drop wise and at 0 C. to a solution of cyclopentanemethanol (16.2 g, 162 mmol) in anhydrous pyridine (35 mL). The mixture was stirred at 0 C. for 5 h, poured into water (200 mL), and extracted with methylene chloride (3¡Á50 mL). The combined organic layers were washed with 1 M HCl (3¡Á20 mL) and brine (2¡Á20 mL), dried with anhydrous magnesium sulphate, and evaporated in vacuo. The residue was dissolved in anhydrous acetone (20 mL), and a solution of sodium iodide (24 g, 162 mmol) in acetone (50 mL) was added. The mixture was refluxed for 5 h. The formed precipitate was filtered off, and the filtrate was evaporated in vacuo. The residue was distilled and the fraction boiling at 71-75 C. (110 Torr) was collected to give iodomethylcyclopentane. Yield: 13.8 g (41%). 1H-NMR (CDCl3, delta ppm): 3.21 (d, J=6.9 Hz, 2H); 2.18 (hept, J=7.5 Hz, 1H); 1.95-1.45 (m, 6H); 1.35-1.11 (m, 2H).

The synthetic route of 3637-61-4 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; Novo Nordisk A/S; US2008/139562; (2008); A1;,
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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. 1562-00-1, name is Sodium isethionate. This compound has unique chemical properties. The synthetic route is as follows. Computed Properties of C2H5NaO4S

Example 5; [TMA][ise]; [TMA][ise] is an ionic liquid comprised of tetramethylammonium (TMA) as the cation, and isethionate (ise) as the anion. In a manner similar to Example 3, a 1-neck round bottom flask holding an aqueous solution of [TMA][OH].5 H2O (9.094 g, 50 mmol) was fitted with a pH probe such that the probe extended below the level of the batch. The pH was adjusted from 14.68 to 5.49 by the addition of 1.44 M sulfuric acid (17.8 mL, 26 mmol) around the probe with stirring, whereupon sodium isethionate (7.438 g, 50 mmol) dissolved in a minimal amount of 2:1 alcohol-water (about 40 mL) was added. The resulting slurry was stirred for about 2 h, whereupon it was suction filtered, and the filtrate was concentrated as far as feasible by rotary evaporation. The residue was taken up in methanol (25 mL) and loaded onto an about 20-g column of 230-400 mesh silica gel previously packed in methanol.As in Example 3, the methanolic solution of crude [TMA][ise] was pushed down to the level of the top of the silica gel bed with air pressure while the column issue was collected in a 250-mL round bottom flask; the flask previously containing the crude product was rinsed with methanol (25 mL) and the rinse methanol was similarly loaded and pressed down while the column issue was collected on top of the first fraction. The rinsing process was repeated once before the silica gel column was washed down with fresh methanol (100 mL), all the while collecting the column issue on top of the accumulated methanol solution. The combined methanolic fractions were concentrated by rotary evaporation to produce purified [TMA][ise] (10.098 g, 51 mmol, 102%) as an ionic liquid. The ionic liquid of Example 5 was solid at ambient conditions, liquid when contained in a sample vial immersed in an 80 C. water bath, and liquid in a relative humidity (RH) chamber maintained above ambient humidity but below 40% RH.

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, 1562-00-1, Sodium isethionate.

Reference:
Patent; FLUIDIC, INC.; US2012/321967; (2012); A1;,
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Synthetic Route of 1805-32-9, 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. 1805-32-9, name is 3,4-Dichlorobenzyl alcohol, molecular formula is C7H6Cl2O, The 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.

(3,4-Dichlorophenyl)methanol 7a (500 mg, 2.84 mmol) and triethylamine (860 mg, 8.52 mmol) were dissolved in 10 mL of dichloromethane, and methanesulfonyl chloride (481 mg, 4.26 mmol) was added dropwise at 0 C. ), react at room temperature for 6 hours. Add 50mL of 10% citric acid solution, extract with dichloromethane (50mL ¡Á 3), and combine the organic phase, wash with saturated sodium bicarbonate solution (50mL) and saturated sodium chloride solution (50mL ¡Á 1), the organic phase is anhydrous Drying over sodium sulfate and concentrating under reduced pressure afforded 3,4-dichlorobenzyl methanesulfonate 7b (724 mg, white solid).

According to the analysis of related databases, 1805-32-9, the application of this compound in the production field has become more and more popular.

Reference:
Patent; Zhejiang Haizheng Pharmaceutical Co., Ltd.; Guan Dongliang; Wang Zhongli; Bai Hua; Liu Zhubo; Meng Lichen; Zhao Weifeng; Ling Long; Wang Yan; (78 pag.)CN109574927; (2019); A;,
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Reference of 23147-58-2, 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.23147-58-2, name is Glycerol aldehyde dimer, molecular formula is C4H8O4, molecular weight is 120.1039, as common compound, the synthetic route is as follows.

Conversions of Glycolaldehyde: EXAMPLES 1 to 12 An electrically heated 160 ml autoclave (Hastelloy) with a mechanical magnet-coupled stirrer was initially charged with 3 g of commercial dimeric glycolaldehyde (50 mmol, calculated as the monomer) in the particular solvent (20 ml). Subsequently, the amount of the activated catalyst specified in Table 1 was added under an inert gas atmosphere, suspended in 10 ml of THF.

The chemical industry reduces the impact on the environment during synthesis 23147-58-2, I believe this compound will play a more active role in future production and life.

Reference:
Patent; BASF SE; US2012/271068; (2012); A1;,
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