Category: ethers-buliding-blocks

Electric Literature of 53087-13-1,Some common heterocyclic compound, 53087-13-1, name is 1-(Benzyloxy)-3-bromobenzene, molecular formula is C13H11BrO, 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.

Iodine, warmed up with magnesium, was added to a suspension of magnesium tunings (i .29 g,52.8 mmol) in dry THF (50 mL). The mixture was ref luxed and about 5% of a solution of 3-bromophenol (i3.9 g, 52.8 mmol) was added. When the reaction had started, the solution of the bromide was added drop-wise and the mixture was then ref luxed for one more hour. Themixture was cooled down to about 5 00 and a solution of the cyclopentanone (4.44 g, 52.8 mmol) in THF (50 mL) was added drop-wise. The mixture was stirred at rt for 72 h, then the reactio was quenched with cooled saturated ammonium chloride solution and extracted with diethyl ether (x3). The organic phase was washed with brine, dried (Na2SO4), filtered and concentrated. The product was purified by silica gel chromatography (isohexane / EtOAc),which gave the title compound (8.5 g, 54%).

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 1-(Benzyloxy)-3-bromobenzene, its application will become more common.

Reference:
Patent; MEDIVIR AB; KALAYANOV, Genadiy; TORSSELL, Staffan; WAeHLING, Horst; WO2015/34420; (2015); A1;,
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Related Products of 2062-98-8,Some common heterocyclic compound, 2062-98-8, name is Perfluoro(2-methyl-3-oxahexanoyl) fluoride, molecular formula is C6F12O2, 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.

In the implementation of the example 1 on the basis of the, to amplify production test: the full the fluorine is positive n-propyl vinyl ether (PPVE) 1 kg, hexafluoropropylene oxide dimer 1.5 kg, cesium fluoride 120g and diethylene glycol dimethyl ether 2.6L adding 10L in the reactor, the temperature is increased to 95 C, stirring for 2 hours, the reaction pressure will not change the observation, cooling, opening the reaction kettle, separating out the lower liquid product distillation is C11 the re-compounding process 1.95 kg, yield is 87%.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route Perfluoro(2-methyl-3-oxahexanoyl) fluoride, its application will become more common.

Reference:
Patent; Tianjin Changlu Chemical New Material Co., Ltd; Zhang, Zhijun; Zhao, Xinghua; Xu, Yashuo; Wang, Bo; Xiao, Shan; (5 pag.)CN105503552; (2016); A;,
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Related Products of 37466-89-0,Some common heterocyclic compound, 37466-89-0, name is 3-Methoxybenzene-1,2-diamine, molecular formula is C7H10N2O, 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-methoxy-6-nitroaniline (1 g, 5.95 mmol), 10% palladium carbon (300 mg) and methanol (25 ml) was stirred in a hydrogen atmosphere for 4 hours. The reaction vessel was purged with nitrogen and a catalyst was removed by filtration. To the reaction mixture, carbon disulfide (15 ml) was added and the mixture was stirred at room temperature overnight. Triethylamine (1 ml) was added to the reaction mixture, which was stirred at 50 C. for 3 hours. After the reaction mixture was concentrated, methanol (2 ml) and diethyl ether (20 ml) were added to the residue. The generated solid was collected by filtration to obtain the title compound (950 mg, yield: 88.6%) as a light orange solid.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 3-Methoxybenzene-1,2-diamine, its application will become more common.

Reference:
Patent; Eisai Co., Ltd.; US2007/10542; (2007); A1;,
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Adding a certain compound to certain chemical reactions, such as: 22236-10-8, name is 4-(Difluoromethoxy)aniline, belongs to ethers-buliding-blocks compound, 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 22236-10-8, Safety of 4-(Difluoromethoxy)aniline

To a mixture of 9 (190 mg, 0.74 mmol), 4-(difluoromethoxy)aniline (5a, 130.5 mg, 0.82 mmol) and 4-(dimethylamino)pyridine (DMAP) (99.4 mg, 0.81 mmol) in dimethylformamide (DMF) (3 mL) was added N’-ethylcarbodiimide hydrochloride (EDO HC1 (156 mg, 0.81 mmol), the mixture was stirred at room temperature for 1 h. Then, 100 mL water was added to the reaction mixture to form off-white precipitate, which was collected on a filter to give an off- white solid. The solid was dissolved in ethyl acetate and dried over MgS04, filtered, and the solvent was removed by rotary evaporator. The crude product was purified by recrystallization from ethyl acetate/hexane to afford 2a as white solid (120.4 mg, 41% yield): mp. 174- 177 C; 1H NMR (500 MHz, CDC13) delta 0.92 (t, J = 7.5 Hz, 3H), 1.64 (m, 2H), 2.06 – 2.22 (m, 2H), 2.42 (t, = 7.5 Hz, 2H), 2.49 (t, = 6.9 Hz, 2H), 3.31 (t, = 5.7 Hz, 2H), 6.01 (s, 1H), 6.45 (t, = 74.0 Hz, 1H), 7.07 (d, J = 8.6 Hz, 2H), 7.55 (d, J = 8.6 Hz, 2H), 7.92 (s, 1H), 12.69 (s, 1H). 13C NMR (125 MHz, CDCI3) delta 13.8, 21.1, 24.8, 30.2, 35.5, 39.7, 107.8, 116.1(t, = 259 Hz), 120.6, 121.3, 135.6, 147.3, 160.2, 165.5, 169.9, 170.5; 19F NMR (376 MHz, CDCI3) delta -80.7; HRMS (ESI+) calcd for C18H22F2N3O3S [M + H]+ 398.1344, found 398.1345 (Delta = -0.03 ppm).

At the same time, in my other blogs, there are other synthetic methods of this type of compound, 4-(Difluoromethoxy)aniline, and friends who are interested can also refer to it.

Reference:
Patent; THE RESEARCH FOUNDATION FOR THE STATE UNIVERSITY OF NEW YORK; OJIMA, Iwao; ALFORD, Vincent; KAMATH, Anushree; CAO, Jian; REN, Xiaodong; SAMPSON, Nicole; AWWA, Monaf; (63 pag.)WO2018/175670; (2018); A1;,
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Application of 204452-91-5,Some common heterocyclic compound, 204452-91-5, name is 7-(Dimethoxymethyl)-1,2,3,4-tetrahydro-1,8-naphthyridine, molecular formula is C11H16N2O2, 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.

5,6,7,8-Tetrahydro-[1,8]naphthyridine-2-carboxaldehyde. 2-Dimethoxymethyl-5,6,7,8-tetrahydro-[1,8]naphthyridine (10 g, 0.048 mol) was treated with trifluoroacetic acid (50 mL) and the resulting solution stirred under argon for 12.5 h. The TFA was removed at reduced pressure and the residue partitioned between sat. NaHCO3 and CH2Cl2. The organic layer was dried, concentrated and passed through a 3 in. pad of silica gel (10% acetone/CH2Cl2) and concentrated to afford 5,6,7,8-tetrahydro-[1,8]naphthyridine-2-carboxaldehyde as a yellow crystalline solid. 1H NMR (300 MHz, CDCl3) delta9.80 (s, 1H); 7.31 (d, J=7.32 Hz, 1H); 7.16 (d, J=7.32 Hz, 1H); 5.31 (br, s, 1H); 3.48 (m, 2H); 2.81 (m, 2H); 1.94 (m, 2H).

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 7-(Dimethoxymethyl)-1,2,3,4-tetrahydro-1,8-naphthyridine, its application will become more common.

Reference:
Patent; Payne, Linda S.; Tran, Lekhanh O.; Zhuang, Linghang H.; Young, Steven D.; Egbertson, Melissa S.; Wai, John S.; Embrey, Mark W.; Fisher, Thorsten E.; Guare, James P.; Langford, H. Marie; Melamed, Jeffrey Y.; Clark, David L.; US2003/229079; (2003); A1;,
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Some common heterocyclic compound, 2734-70-5, name is 2,6-Dimethoxyaniline, molecular formula is C8H11NO2, 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. SDS of cas: 2734-70-5

Trimethylalurninum (4.7 mL, 9.4 mmol) was added dropwise to a solution of 2,6-dimethoxyaniline (1.2 g, 7.8 mmol) and Compound lb (0.80 g, 9.4 mmol) in toluene (10mL) while cooling in an ice bath. After addition was complete, the reaction mixture was warmed to 110 °C and was stirred at this temperature for l4hrs. The cooled reaction mixture was partitioned between a saturated solution of Rochelle?s salt and EtOAc. The organic phase was separated, dried over MgSO4, filtered and concentrated under reducedpressure. The resulting residue was added to a silica gel (120 g) colunm and was eluted with 0-20percent of 20percent MeOH/DCM in 0.5percent TEA/DCM to give Compound lc (1.1 g, 4.5 mmol, 57 percent) as a brown liquid. MS ,n/z 239.0 (M+H). 1H NMR (500M1-lz, CDC13) 67.01(t, J 8.3 Hz, 1H), 6,62 (d, J= 7.7 Hz, 2H), 5.32 (s, 2H), 4.88 (hr s, 2H), 4.31 (s,2H), 3.82 (s, 6H), 3.62-3.73 (m, 2H), 1.19-1.33 (m, 3H).

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 2734-70-5, its application will become more common.

Reference:
Patent; BRISTOL-MYERS SQUIBB COMPANY; MENG, Wei; CHAO, Hannguang J.; FINLAY, Heather; LAWRENCE, R., Michael; MYERS, Michael C.; (154 pag.)WO2017/96130; (2017); A1;,
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Related Products of 64115-88-4,Some common heterocyclic compound, 64115-88-4, name is 1-Bromo-2-(trifluoromethoxy)benzene, molecular formula is C7H4BrF3O, 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.

5 rnL microwave vial was charged 4-ethynyl-7H-pyrrolo[2,3-d]pyrimidine (143 mg, 1.0 mmol), l-bromo-2-(trifluoromethoxy)benzene (241 mg, 1.0 mmol), PdCl2(PPhS)2 (35 mg, 0.05 mmol) and CuI (10 mg, 0.05 mmol). 3 mL of anhydrous CH3CN were added, after 10 min of stirring followed by 1.4 mL of Et3N. The reaction mixture was purged with argon for 5 min. Then the vial was capped and placed in a heating block at 60 0C for 18 h. Then it was cooled down to ambient temperature and concentrated in vacuo. The resulting black residue was re-dissolved in 3 mL of DMF and purified by reverse-phase preparative HPLC in CH3CN/H2O system containing 0.1% of TFA. Fractions, containing the product, were combined and partitioned between EtOAc (50 mL) and saturated aqueous NaHCO3 (50 mL). The organic layer was washed with brine (1 x 30 mL), dried over anhydrous Na2SO4 and filtered through a short silica gel plug. The filtrate was concentrated in vacuo to give the title product as a yellow solid (43 mg, 14% yield).[0334] 1H NMR (500 MHz, DMSO-J6): delta 6.63 (d, J = 3.5 Hz, IH), 7.55 (dt, J = 7.5, 1.0 Hz, IH), 7.59 (d, J = 8.4 Hz, IH), 7.67 (dt, J = 8.4, 1.7 Hz, IH), 7.75 (d, J = 3.5 Hz, IH), 7.92 (dd, J = 7.7, 1.6 Hz, IH), 8.79 (s, IH), 12.42 (s, IH)[0335] MS (ES+): m/z 304 (M+H)+

The synthetic route of 64115-88-4 has been constantly updated, and we look forward to future research findings.

Reference:
Patent; TARGEGEN INC.; WO2009/55674; (2009); A1;,
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Related Products of 1484-26-0,Some common heterocyclic compound, 1484-26-0, name is 3-Benzyloxyaniline, molecular formula is C13H13NO, 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.

Specifically, a solution of 3-benzyloxyaniline 2e (0.84 g, 4.2 mmol) and diphenylcyanocarbonimidate 1 (1.0 g, 4.2 mmol) in 2-PrOH (15 ml_) was stirred at ambient temperature under N2. After 5 h, the solids were collected by filtration washing with cold 2-PrOH to afford 3e (1.25g, 86percent) as a white solid: 1H NMR (300 MHz, DMSO- d6) delta 7.47-7.26 (m, 12H), 7.17 (s, 1H), 7.05 (d, J = 7.9 Hz, 1H), 6.90 (d, J = 8.3 Hz, 1H), 5.10 (s, 2H).

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 3-Benzyloxyaniline, its application will become more common.

Reference:
Patent; RIGEL PHARMACEUTICALS, INC.; WO2007/30680; (2007); A2;,
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Related Products of 402-52-8,Some common heterocyclic compound, 402-52-8, name is 1-Methoxy-4-(trifluoromethyl)benzene, molecular formula is C8H7F3O, 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.

EXAMPLE 12 Production of 2-Methoxy-5-(trifluoromethyl)acetophenone 97.0 g (0.65 moles) of trifluoromethanesulfonic acid were put into a 200 ml three-necked flask. The flask was equipped with a reflux condenser, a dropping funnel and a thermometer and was connected with a calcium chloride tube for shielding the flask against moisture of the outside. A mixture of 22.8 g (0.13 moles) of 4-(trifluoromethyl)anisole and 26.5 g (0.26 moles) of acetic anhydride was added in a dropwise manner at a temperature of not higher than 30 C. to the flask under stirring. After the adding, the reaction was conducted for 3 hrs at 20-25 C. The resulting reaction liquid was poured into 300 ml of iced water. Then, 200 ml of ether were added to extract the reaction product. Then, 100 ml of ether were added to the aqueous layer to extract the reaction product again. The resulting two ether layers were combined together, followed by washing with 10% sodium hydrogencarbonate aqueous solution until the ether layer is made basic.

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 1-Methoxy-4-(trifluoromethyl)benzene, its application will become more common.

Reference:
Patent; Central Glass Company, Limited; US2003/109574; (2003); A1;,
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Electric Literature of 17061-62-0, In the next few decades, the world population will flourish. As the population grows rapidly and people all over the world use more and more resources, all industries must consider their environmental impact. 17061-62-0, name is Bis(4-methoxybenzyl)amine belongs to ethers-buliding-blocks compound, it is a common compound, a new synthetic route is introduced below.

[09331 N,N-bis(4-methoxybenzyl)ethenesulfonamide, Example 460.1. To1 L round bottomed flask was added bis(4-methoxvbenzvl)amine 12.01 (23.16 g, 90 mmol) and TEA (anhydrous (43.8 mL, 315 mmol)) in DCM (200 mL). At 0 C (ice bath), 2-chloro-1-ethanesulfonyl chloride (10.41 mL, 99 mmol) in DCM (100 mL) was added dropwise with stirring. The reaction mixture was stirred at 0 C for 3 h after completion of the addition. LCMS analysis indicated the reaction was complete. The reaction mixture was diluted with water and extracted with DCM. The organic extract was washed with brine and dried over Na2SO4. The solution was filtered and concentrated in vacuo to give the initial material as a light-yellow oil, which was purified by silica gel chromatography (a gradient of 0-60% EtOAc in hexanes), to provide 460.1 (23 g, 66.2 mmol, 74% yield) as a white solid. LCMS-ESI (POS), mlz: 370.1 (M+Na).

In the field of chemistry, the synthetic routes of compounds are constantly being developed and updated. I will also mention this compound in other articles, Bis(4-methoxybenzyl)amine, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; AMGEN INC.; CHEN, Ning; CHEN, Xiaoqi; CHEN, Yinhong; CHENG, Alan C.; CONNORS, Richard V.; DEIGNAN, Jeffrey; DRANSFIELD, Paul John; DU, Xiaohui; FU, Zice; HEATH, Julie Anne; HORNE, Daniel B.; HOUZE, Jonathan; KALLER, Matthew R.; KHAKOO, Aarif Yusuf; KOPECKY, David John; LAI, Su-Jen; MA, Zhihua; MCGEE, Lawrence R.; MEDINA, Julio C.; MIHALIC, Jeffrey T.; NISHIMURA, Nobuko; OLSON, Steven H.; PATTAROPONG, Vatee; SWAMINATH, Gayathri; WANG, Xiaodong; YANG, Kevin; YEH, Wen-Chen; DEBENEDETTO, Mikkel V.; FARRELL, Robert P.; HEDLEY, Simon J.; JUDD, Ted C.; KAYSER, Frank; (1266 pag.)WO2016/187308; (2016); A1;,
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