Day: September 7, 2020

17347-61-4, 2,2-Dimethylsuccinicanhydride is a Tetrahydrofurans compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated,17347-61-4

Compound 6 (16 mg, 0.032 mmol), 2,2-dimethylsuccinic anhydride (41 mg, 0.32 mmol), DMAP (8 mg, 0.064 mmol) and pyridine (1.5 mL) were put into a 10 mL glass tube and sealed. The mixture was stirred at 120 C for about 12 h. The reaction mixture was then transferred into a 50 mL flask. Pyridine was removed under reduced pressure. 3N HCl (10 mL) was added, the mixture was extracted three times with EtOAc, and the organic layer washed with 3 N HCl for a second time. Then the organic layer was washed with brine, dried over anhydrous Na2SO4, and concentrated in vacuo. The residue was purified by silica gel column chromatography (hexane/EtOAc as eluent) to provide target product 8 (11 mg). White solid, yield 54%. 1H NMR (CDCl3, 400 MHz,ppm) delta: 4.76 (d, 1H, J=12Hz, CH-OCO), in C3), 4.73 (s, 1H, C=CH,in C29), 4.60 (s, 1H, C=CH, in C29), 4.67, 4.51 (2m, 1H, CH-F, in C2), 3.66 (s, 3H, CO2CH3), 2.98 (m, 1H, in C19), 2.76-2.62 (2d, J=16 Hz, CO-CH2-C(CH3)2),1.67 (s, CH3, in C30), 1.32 (s, 6H, 2CH3, CO2H-C(CH3)2-CH2-),0.90, 0.88, 0.86, 0.83, 0.81 (5s, 5 x 3H, 5 x CH3, in C23, C24, C25, C26, C27). MS (ESI-) m/z: 639.45 (M+Na)+, 655.40 (M+K)+ for C37H57FO6.

17347-61-4 2,2-Dimethylsuccinicanhydride 87067, aTetrahydrofurans compound, is more and more widely used in various.

Reference£º
Article; Li, Jizhen; Goto, Masuo; Yang, Xiaoming; Morris-Natschke, Susan L.; Huang, Li; Chen, Chin-Ho; Lee, Kuo-Hsiung; Bioorganic and Medicinal Chemistry Letters; vol. 26; 1; (2016); p. 68 – 71;,
Tetrahydrofuran – Wikipedia
Tetrahydrofuran | (CH2)3CH2O – PubChem

4100-80-5, 3-Methyldihydrofuran-2,5-dione is a Tetrahydrofurans compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated,4100-80-5

The starting material is prepared as follows: The mixture of 28.5 g of 2-methylsuccinic anhydride, 23.5 g of 4-aminopyridine and 350 ml of xylene is refluxed on a water separator while stirring for 3.5 hours. The hot solution is decanted from some gummy residue, cooled, filtered, the residue suspended in 100 ml of boiling isopropanol and filtered off again, to yield the 3-methyl-1-(4-pyridyl)-pyrrolidin-2,5-dione melting at 119¡ã-120¡ã. The mixture of 34.6 g thereof, 9 g of 10percent palladium on carbon and 400 ml of glacial acetic acid is hydrogenated at 110¡ã C. and approximately 1.7 atm. until the theoretical amount of hydrogen has been absorbed. The mixture is filtered, evaporated and the residue taken up in water. The pH of the mixture is adjusted to 9-10 with sodium carbonate and the liberated base extracted with methylene chloride. The extract is dried and evaporated, to yield the 3-methyl-1-(4-piperidinyl)-pyrrolidin-2,5-dione, which is used directly without further purification.

4100-80-5 3-Methyldihydrofuran-2,5-dione 20051, aTetrahydrofurans compound, is more and more widely used in various.

Reference£º
Patent; Ciba-Geigy Corporation; US4255429; (1981); A;,
Tetrahydrofuran – Wikipedia
Tetrahydrofuran | (CH2)3CH2O – PubChem

124391-75-9, (S)-(Tetrahydrofuran-3-yl)methanol is a Tetrahydrofurans compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated,124391-75-9

To thoroughly dried ground 4A molecular sieves (5 g) was added ANHYDROUS CH2CI2 (20 ML) and 4-METHYLMORPHOLINE-N-OXIDE MO) (1. 76. G, 15 MMOL). The mixture was stirred at 0 ¡ãC for 15 min, then tetrahydro-3-furanmethanol (0. 96 ML, 10 mmol) and tetrapropylammonium PEIRUTHENATE (TPAP) (0.17 g, 0.5 mmol) were added and the mixture stirred for 90 min. The solvent volume was reduced and the entire reaction content was passed through a short silica gel column with ET20 lutant to yield TETRAHYDRO-FURAN-3-CARBALDEHYDE (approx 50 percent yield, together with A DIMERIC product). Wittig reaction of the crude aldehyde with (cyanomethyl) triphenylphosphonium chloride as DESCIBED for 3-furan-3-yl-propylamine gave 3-(tetrahydro-furan-3-yl)-acrylonitrile (3.3 mmol) as a 2: 1 mixture (1H NMR) of the E/Z isomers after column chromatography (10 percent Et2O/CH2Cl2 elutant). Hydrogenation of 3- (TETRAHYDRO-FURAN-3-YL)-ACRYLONITRILE in the presence of Raney Ni as detailed for 3-furan-3-yl) -propylamine gave the title amine (33 percent yield). ESI-MS (M/Z) 130 [M+H]+.

As the paragraph descriping shows that 124391-75-9 is playing an increasingly important role.

Reference£º
Patent; PHARMACOPEIA DRUG DISCOVERY, INC.; WO2004/63192; (2004); A1;,
Tetrahydrofuran – Wikipedia
Tetrahydrofuran | (CH2)3CH2O – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.124391-75-9,(S)-(Tetrahydrofuran-3-yl)methanol,as a common compound, the synthetic route is as follows.,124391-75-9

(1) Tetrahydrofuran-3-ylmethyl 4-methylbenzenesulfonate Tetrahydro-3-furanmethanol (4.09 g) and triethylamine (7.81 mL) were dissolved in tetrahydrofuran (30 mL). p-Toluenesulfonyl chloride (9.53 g) was added under ice-cooling, followed by stirring for one hour. Then, the mixture was heated to room temperature and further stirred for 18 hours. Water was added to the reaction mixture, followed by extraction with ethyl acetate. Then, the organic layer was sequentially washed with a saturated sodium chloride solution and a saturated sodium bicarbonate solution, dried over magnesium sulfate and filtered. Then, the solvent was evaporated under reduced pressure. The residue was purified by silica gel column chromatography (heptane-ethyl acetate) to obtain the title compound (8.9 g). 1H-NMR (400 MHz, CDCl3) delta (ppm): 1.50-1.60 (m, 1H) , 1.96-2.04 (m, 1H), 2.45 (s, 3H), 2.53-2.64 (m, 1H), 3.47-3.51 (m, 1H), 3.65-3.81 (m, 3H), 3.88-3.93 (m, 1H), 3.96-4.00 (m, 1H), 7.32-7.36 (m, 2H), 7.76-7.79 (m, 2H).

As the paragraph descriping shows that 124391-75-9 is playing an increasingly important role.

Reference£º
Patent; Eisai R&D Management Co., Ltd.; EP2017275; (2009); A1;,
Tetrahydrofuran – Wikipedia
Tetrahydrofuran | (CH2)3CH2O – PubChem

1679-47-6, 3-Methyldihydrofuran-2(3H)-one is a Tetrahydrofurans compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated,1679-47-6

To a 2 L, 3-neck round bottom flask, equipped with a mechanic stirrer and an internal temperature controller, is added a solution of 2,4-dichlorobromobenzene (65.5 g, 290.7 mmol) in 1.1 L [OF THF] under nitrogen. The solution is cooled to-95 C with a [MEOH/LIQUID] nitrogen bath. To this solution is added t-BuLi (400 mL, 1.6 M in pentane, 639.5 mmol) slowly via syringe pump followed by the addition of a solution of [OC-METHYL-Y-BUTYROLACTONE] (43.5 g, 434.8 mmol) in THF (100 mL). The internal temperature is controlled <-80 [C.] After 1 h stirring [<-80 C,] the reaction mixture is quenched with saturated NH4C1 solution and warmed to room temperature. Water (2 L) and EtOAc (1 L) are added and separated. The aqueous layer is extracted with EtOAc (2 x 2 L). The combined organic solutions is dried [(MGSO4)] and filtered. The filtrate is concentrated in vacuo to dryness to give 80.9 g of [1- (2,] 4-dichlorophenyl) -4- hydroxy-2-methylbutan-1-one as light yellow oil. The residue is used for Swern oxidation. To a 2 L, 3-neck round bottom flask, equipped with a mechanic stirrer and an internal temperature controller, is added DMSO (104.1 mL, 1465.7 mmol) and [CH2C12] (1.1 L). The solution is cooled to-80 C with a [MEOH/LIQUID] nitrogen bath. To this solution is added oxalyl chloride (63.9 mL, 732.9 mmol) slowly via syringe pump. The mixture is stirred at-80 C for 15 min followed by the addition of a solution of the above obtained crude [1- (2,] 4-dichlorophenyl) -4-hydroxy-2- methylbutan-1-one in [CH2C12] (150 mL) slowly via syringe pump. After stirring <-70 [C] for 1 h, to the mixture is added [ET3N] (456 mL, 3271.7 mmol). The cooling bath is removed after 5 min and the mixture is stirred at room temperature for 1.5 h. The mixture is diluted with hexanes (6 L) and washed with water (6 L). The aqueous layer is extracted with hexanes (6 L). The combined organic solutions is concentrated in vacuo to dryness and the residue is subjected to column chromatography (silica gel, 1/6 EtOAc/heptane) to give 36 g (50% for two steps) of light yellow oil as the title compound [:'H] NMR (400 MHz, CDCl3) 8 9.86 (s, 1H), 7.61 (d, J= 8.3 Hz, 1H), 7.49 (d, J=2. 0 Hz, 1H), 7.37 (dd, J=2. 0,8. 3 Hz, 1H), 3.81-3. 76 (m, 1H), 3.18 (dd, [J =] 8.2, 18.6 Hz, 1H), 2.65 (dd, [J =] 5.0, 18.6 Hz, 1H), 1.21 (d, [J =] 7.3 Hz, 3H) ; 13C NMR (100 MHz, [CDC13)] [# 206. ] 1,202. 4,139. 5,139. 2,134. 4,132. 7,132. 4,129. 6,48. 8, 42.0, 18.6 ; IR (liq. ) 2974,2936, 1996,1910, 1708,1585, 1457,1374, 1228, [1191,] 1106,1064, 978,828, [810 CM'' ;] MS (CI) [NZLZ] 247 (M+), 245 (M+). As the paragraph descriping shows that 1679-47-6 is playing an increasingly important role. Reference£º
Patent; PHARMACIA & UPJOHN COMPANY; WO2004/35586; (2004); A1;,
Tetrahydrofuran – Wikipedia
Tetrahydrofuran | (CH2)3CH2O – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.17347-61-4,2,2-Dimethylsuccinicanhydride,as a common compound, the synthetic route is as follows.,17347-61-4

Example 25 : Preparation of 4-(((l S,3aS,5aR,5bR,7aR,9S, 11 aR, 1 IbR, 13aR, 13bR)-l – isopropyl-3a-((S)-2-(5-(4-metho xyphenyl)-lH-imidazol-2-yl)pyrro lidine- 1 -carbonyl)- 5a,5b,8,8,l la-pentamethylicosahydro-lH-cyclopenta[a]chrysen-9-yl)oxy)-2,2-dimethyl-4- oxobutanoic acid: [0210] To a stirred solution of ((lS,3aS,5aR,5bR,7aR,9S,l laR,l lbR,13aR,13bR)-9- hydroxy- 1 -isopropyl-5 a,5b,8,8, 11 a-pentamethylicosahydro-3aH-cyclopenta[a]chrysen-3a- yl)((S)-2-(5-(4-methoxyphenyl)- lH-imidazol-2-yl)pyrrolidin- 1 -yl)methanone (Example 24- step 2, 0.2 g, 0.29 mmol) and 2,2-dimethyl succinicanhydride (0.14 g, 1.17 mmol) in toluene (6 mL) was added DMAP (0.07 g, 0.58 mmol). The reaction mixture was heated at 90¡ãC for 12 hours. After completion of the reaction (monitored by TLC), reaction mixture was concentrated under reduced pressure, cooled to 0¡ãC, acidified to pH = 6 with IN HC1 and extracted with DCM. The combined organic extracts were washed with water, brine, dried over Na2S04. Then the solvent was evaporated and to the resulting solid was recrystalised from ACN to give the title compound (0.09 g, Yield 26percent) as a white solid. 1H-NMR, CDC13, 300 MHz): delta 7.49- 7.47 (m, 2H), 7.12 (s, 1H), 6.89 (d, J = 8.7 Hz, 2H), 5.36- 5.34 (m, 1H), 4.54- 4.49 (m, 1H), 3.81 (s, 3H), 3.68- 3.56 (m, 2H), 2.94- 2.90 (m, 2H), 2.71- 1.12 (m, 36H), 0.99- 0.84 (m, 18H), 0.72 (d, J = 6.6 Hz, 3H); ESI MS: 812.5 (M+H).

As the paragraph descriping shows that 17347-61-4 is playing an increasingly important role.

Reference£º
Patent; HETERO RESEARCH FOUNDATION; PANDURANGA REDDY, Adulla; PARTHASARADHI REDDY, Bandi; RATHNAKAR REDDY, Kura; VL SUBRAHMANYAM, Lanka; DAVID KRUPADANAM, Gazula, Levi; VENKATI, Mukkera; SUDHAKAR, Neela; SRINIVAS REDDY, Kallem; WO2014/105926; (2014); A1;,
Tetrahydrofuran – Wikipedia
Tetrahydrofuran | (CH2)3CH2O – PubChem

17347-61-4, 2,2-Dimethylsuccinicanhydride is a Tetrahydrofurans compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated,17347-61-4

To a stirred solution of (1R,3aS,5aR,5bR,7aR,9S,11aR,11bR,13aR,13bR)-9-hydroxy- 5a,5b,8,8,11a-pentamethyl-N-(1-(5-phenyl-1H-imidazol-2-yl)cyclopentyl)-1-(prop-1-en-2-yl)icosahydro-3aH-cyclopenta[a]chrysene-3a-carboxamide (step 2, 0.06 g, 0.09 mmol) and 2,2-dimethyl succinicanhydride (0.046 g, 0.36 mmol) in toluene (4 ml), was added DMAP (0.022 g, 0.18 mmol). The reaction mixture was heated at 90C for about 12 hours. After completion of the reaction (monitored by TLC), the reaction mixture was concentrated under reduced pressure, cooled to 0C, acidified to pH=6 with 1N HCl and extracted with DCM. The combined organic extracts were washed with water, brine, dried over Na2SO4 then the solvent was evaporated under reduced pressure and the resulting solid was recrystallized from ACN to afford the title compound (0.022 g, yield: 31%). 1H NMR (300 MHz, CDCl3): delta 7.65-7.62 (m, 2H), 7.36-7.29 (m, 4H), 4.59 (s, 1H), 4.51 (s, 1H), 4.46-4.38 (m, 1H), 2.93- 2.91 (m, 1H), 2.62-1.31 (m, 32H), 1.26 (s, 3H), 1.22 (s, 6H), 0.86-0.68 (m, 19H); ES Mass: 794.64 [M+H]+.

As the paragraph descriping shows that 17347-61-4 is playing an increasingly important role.

Reference£º
Patent; HETERO RESEARCH FOUNDATION; BANDI, Parthasaradhi Reddy; KURA, Rathnakar Reddy; GAZULA LEVI, David Krupadanam; ADULLA, Panduranga Reddy; NEELA, Sudhakar; MOGILI, Narsingam; (87 pag.)WO2017/21922; (2017); A1;,
Tetrahydrofuran – Wikipedia
Tetrahydrofuran | (CH2)3CH2O – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.16874-33-2,Tetrahydrofuran-2-carboxylic acid,as a common compound, the synthetic route is as follows.,16874-33-2

Example-3: N-[3-[(4-Amino-6,7-dimethoxy-2-quinazolinyl)methylamino]propyl]tetrahydro- 2-furan carboxamide (Alfuzosin)To a mixture of terahydrofuroic-2-acid (99.7 gm) and dichloromethane (600ml) at 0 to 50C, triethylamine (86.8 gm) was added. To the resulting reaction mixture, ethyl chloroformate (93.2 gm) was added at low temperature. The reaction mixture was further stirred for one hour and a slurry of N]-(4-Amino-6,7-dimethoxyquinazol-2-yl)-Ni-methylpropylenediamine (100 gm) in dichloromethane (400 ml) was added. The resultant mixture was stirred for about one hour for the completion of the reaction and sodium hydroxide solution (500 ml, IN) was added. The layers were separated and the organic layer was washed with sodium hydroxide solution and concentrated under vacuum. The residue thus obtained was stirred with methanol (200 ml) for three hours to get slurry, which was filtered to get alfuzosin base in solid form. The product thus obtained was re-crystallized from methanol to get pure, isolated, solid alfuzosin base. Yield: 75 gm Purity: 99.8percent

The synthetic route of 16874-33-2 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; WOCKHARDT LTD.; NATHANI, Pankaj Kumar; NARODE, Sunil Dnyaneshwar; SIDDIQUI, Mohammad Jaweed Mukarram; WO2007/69050; (2007); A2;,
Tetrahydrofuran – Wikipedia
Tetrahydrofuran | (CH2)3CH2O – PubChem

696-59-3, 2,5-Dimethoxytetrahydrofuran is a Tetrahydrofurans compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated,696-59-3

General procedure: Amine (1 mmol), 2,5-dimethoxytetrahydrofuran (1.1 mmol)and L-(+)-tartaric acid-choline chloride based DES (1.5 g) were added to a 50 mL round bottom flask and the reaction mixturewas stirred at 90 C. The progress of the reaction was monitoredby TLC. After completion of the reaction, the mixture was cooled to room temperature and the product was extracted with ethyl acetate.After the evaporation of the solvent, the residue was purified by columnchromatography on silica gel to afford the pure product. The DES wasdried under vacuumand reused for the next cycle.

The synthetic route of 696-59-3 has been constantly updated, and we look forward to future research findings.

Reference£º
Article; Wang, Ping; Ma, Fei-Ping; Zhang, Zhan-Hui; Journal of Molecular Liquids; vol. 198; (2014); p. 259 – 262;,
Tetrahydrofuran – Wikipedia
Tetrahydrofuran | (CH2)3CH2O – PubChem

With the rapid development and complex challenges of chemical substances, new drug synthesis pathways are usually the most effective.696-59-3,2,5-Dimethoxytetrahydrofuran,as a common compound, the synthetic route is as follows.,696-59-3

7a 1-(4-Methylphenyl)pyrrole The title compound was obtained as yellow crystals (10.5 g, 66%, m.p. 82-83 C.) from 4-methylaniline (10.7 g) and 2,5-dimethoxytetrahydrofuran (13.2 g) according to the known methods (R. Jones, C. F. Candy and P. H. Wright, J. Chem. Soc., 1970, 2563).

The synthetic route of 696-59-3 has been constantly updated, and we look forward to future research findings.

Reference£º
Patent; Takeda Chemical Industries, Ltd.; US5389641; (1995); A;,
Tetrahydrofuran – Wikipedia
Tetrahydrofuran | (CH2)3CH2O – PubChem