Month: November 2020

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. 626-40-4, name is 3,5-Dibromoaniline, A new synthetic method of this compound is introduced below., 626-40-4

2.51 g (10.0 mmol) of 3,5-dibromophenylamine, 4.48 g (22.0 mmol) of iodobenzene, 0.58 g (0.5 mmol) of Pd (PPh ) (Tetrakis (triphenylphosphine) palladium (0)) and 6.21 g (45.0 mmol) of K CO were mixed with THF (tetrahydrofuran) / H 0(2/1) After dissolving in 40 mL of the solution, the mixture was stirred at 80 C. for 5 hours. The reaction solution was cooled to room temperature, and thenextracted three times with 40 mL of water and 40 mL of diethyl ether. The organic layer thus obtained was dried over magnesium sulfate and the residue obtainedby evaporation of the solvent was separated and purified by silica gel column chromatography to obtain Intermediate I-4 (2.11 g, 86% yield). The resulting compound was confirmed by LC-MS.

The basis of chemical reaction formula synthesis, the synthesis route is composed of some specific reactions and combined according to certain logical thinking. We look forward to the emergence of more reaction modes in the future.

Reference:
Patent; Samsung Display Co., Ltd.; Kim Yeong-guk; Hwang Seok-hwan; Jeong Hye-jin; Park Jun-ha; Lee Eun-yeong; Im Jin-o; Han Sang-hyeon; Jeong Eun-jae; Kim Su-yeon; Lee Jong-hyeok; (64 pag.)KR102052070; (2019); B1;,
Bromide – Wikipedia,
bromide – Wiktionary

955959-84-9, The chemical industry reduces the impact on the environment during synthesis 955959-84-9, name is 4-(4-Bromophenyl)dibenzo[b,d]furan, I believe this compound will play a more active role in future production and life.

The specific synthetic route of the compound is now provided:250ml of four bottles, in the atmosphere of nitrogen,0.01 mol of 2- (4-bromophenyl) -dibenzofuran, 0.025 mol of acridine,0.03 mol sodium tert-butoxide, 1 x 10-4 mol Pd2 (dba) 3, 1 x 10-4 mol tri-tert-butylphosphine,150ml toluene, heated reflux 24 hours, sampling point plate, the reaction is complete, natural cooling, filtration,The filtrate was steamed and passed through a silica gel column to give the target product with 99.0percent purity and 69.00percent yield.

The chemical industry reduces the impact on the environment during synthesis 4-(4-Bromophenyl)dibenzo[b,d]furan. I believe this compound will play a more active role in future production and life.

Reference:
Patent; CECEP Wanrun Co., Ltd.; Li Chong; Xu Kai; Zhang Zhaochao; (37 pag.)CN107056758; (2017); A;,
Bromide – Wikipedia,
bromide – Wiktionary

A common heterocyclic compound, 68322-84-9, name is 2-Bromo-1-fluoro-4-(trifluoromethyl)benzene, molecular formula is C7H3BrF4, 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. 68322-84-9.

EXAMPLE 211 (+)-(4aR)-(10bR)-4-methyl-8-(2-fluoro-5-trifluoromethylphenyl)-10b-methyl-1,2,3,4,4a,5,6,10b-octahydrobenzo[f]quinolin-3-one STR229 A 15 mL round bottom flask was charged with (+)-(4aR)-(10bR)-4-methyl-10b-methyl-1,2,3,4,4a,5,6,10b-octahydrobenzo[f]quinolin-3-one-8-boronic acid (178 mg, 0.65 mmol), tetrakis(triphenylphosphine)palladium(0) (23 mg, 0.02 mmol), 3-bromo-4-fluorobenzotrifluoride (158 mg, 0.65 mmol), 0.65 mL of 2M aqueous sodium carbonate and 2 mL of THF, fitted with a reflux condenser, and the stirred mixture was heated at 80, under nitrogen, for 24 h. The mixture was cooled, diluted with ethyl acetate (75 mL) and washed with brine (2*25 mL). The combined organic extracts were dried over sodium sulfate, concentrated, and purified by silica gel chromatography (70% ethyl acetate/hexanes eluent) to give 113 mg (44%) of the title compound as an oil. FDMS: m/e =391. alpha[D]589 =+55.84 (c=0.34, chloroform)

These compound has a wide range of applications. It is believed that with the continuous development of the source of the synthetic route 2-Bromo-1-fluoro-4-(trifluoromethyl)benzene, its application will become more common.

Reference:
Patent; Eli Lilly and Company; US5578724; (1996); A;,
Bromide – Wikipedia,
bromide – Wiktionary

The chemical industry reduces the impact on the environment during synthesis 699-03-6, name is 1-(4-Bromophenyl)-N-methylmethanamine, I believe this compound will play a more active role in future production and life. 699-03-6

The prepared Formula-G was then dissolved in dichloromethane (1.8 L). Triethylamine (1.6 moles, 223.2 mL) was added at 5 C. A solution of methyl chloroformate (1.3 moles, 100.4 mL in dichloromethane (0.2 L) was slowly added, maintaining the temperature of the mixture between about 10 C and 14 C. The reaction solution was stirred at room temperature for 12 hours. Water was added to the reaction mass and the organic phase was separated and concentrated to afford a compound of Formula-E (wherein L=Br, P=methyl carbamate).

The chemical industry reduces the impact on the environment during synthesis 699-03-6. I believe this compound will play a more active role in future production and life.

Reference:
Patent; MYLAN LABORATORIES LTD; JAYACHANDRA, Sureshbabu; SETHI, Madhuresh; KAUSHIK, Vipin Kumar; RAVI, Vijaya, Krishna; TELAGAMSETTY, Bhaskar Kumar; (44 pag.)WO2019/130229; (2019); A1;,
Bromide – Wikipedia,
bromide – Wiktionary

608-30-0, 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. 608-30-0, name is 2,6-Dibromoaniline, This compound has unique chemical properties. The synthetic route is as follows.

(1) Preparation of 2,6-Bis(4-t-butylphenyl)aniline The same procedure as in Example 1(1) was used except that reaction was conducted by using 2,6-dibromoaniline (9.00 g, 35.6 mmol), Pd(PPh3)4 (5.0 g), and 4-t-butylphenyl boronic acid (19.0 g, 107 mmol). Yield 3.0 g. 1H NMR (CD2Cl2): delta 7.50 (d, 4H, Harom), 7.43 (d, 4H, Harom), 7.08 (d, 2H, Harom), 6.83 (t, 1H, Harom), 3.93 (s, 2H, NH2), 1.38 (s, 18H, t-Bu).

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.

Reference:
Patent; Razavi, Abbas; Marin, Vladimir; Lopez, Margarito; US2005/90385; (2005); A1;,
Bromide – Wikipedia,
bromide – Wiktionary

The chemical industry reduces the impact on the environment during synthesis 156682-52-9, name is 1,4-Dibromo-2,3-difluorobenzene, I believe this compound will play a more active role in future production and life. 156682-52-9

To a solution of (S)-5-(hydroxymethyl)pyrrolidin-2-one (1.0 g, 8.7 mmol) in 1,4-dioxane (15 mL) at rt, were added 1,4-dibromo-2,3-difluorobenzene (2.4 g, 8.7 mmol), K3PO4 (3.7 g, 17 mmol) and, N,N-dimethylethylenediamine (0.15 g, 1.7 mmol). The reaction mixture was purged with nitrogen for 5 min and then charged with copper (I) iodide (0.17 g, 0.87 mmol). The reaction mixture was again purged with nitrogen for 3 min and heated at 95 C. for 12 h. The reaction mixture was cooled, filtered through a Celite pad and the filtrate was concentrated under reduced pressure. The crude compound was purified by column chromatography (3% MeOH-CHCl3) to yield Intermediate 28 (0.80 g, 2.6 mmol, 30% yield) as a yellowish solid. MS(ESI) m/z: 305.9 [M+H]+. 1H NMR (400 MHz, DMSO-d6) delta=7.59 (ddd, J=8.8, 7.0, 2.3 Hz, 1H), 7.24 (ddd, J=9.0, 7.0, 2.0 Hz, 1H), 4.80 (t, J=5.0 Hz, 1H), 4.20-4.04 (m, 1H), 3.37 (dd, J=5.0, 4.0 Hz, 2H), 2.56-2.45 (m, 1H), 2.43-2.35 (m, 1H), 2.25-2.18 (m, 1H), 2.07-1.95 (m, 1H).

The chemical industry reduces the impact on the environment during synthesis 156682-52-9. I believe this compound will play a more active role in future production and life.

Reference:
Patent; BRISTOL-MYERS SQUIBB COMPANY; Shirude, Pravin Sudhakar; Baligar, Vishweshwaraiah; Seshadri, Balaji; Chattopadhyay, Amit Kumar; Wurtz, Nicholas R.; Kick, Ellen K.; (91 pag.)US2019/270704; (2019); A1;,
Bromide – Wikipedia,
bromide – Wiktionary

Adding some certain compound to certain chemical reactions, such as: 626-40-4, name is 3,5-Dibromoaniline, 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 626-40-4. 626-40-4

1-Benzoyl-3-(3,5-dibromo-phenyl)-thiourea.To the solution of 3,5-dibromoaniline (65.0 g, 0.26 mol) in anhydrous acetone (1.6 L) was added benzoylisothiocyanate (46.4 g, 0.28 mol) and the reaction mixture was stirred at room temperature for 30 min. Acetone was distilled off and the crude residue was washed with hexane to obtain desired compound as yellow solid (96.5 g, 90 %).1H-NMR (400 MHz1 DMSO-d6): delta 7.56 (t, J= 7.60 Hz, 2H), 7.67 (t, J= 7.20 Hz, 1 H), 7.75 (s, 1 H), 7.96-7.98 (m, 4H), 11.76 (br s, 1 H) and 12.54 (br s, 1 H).

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 reaction routes of 3,5-Dibromoaniline.

Reference:
Patent; PROLYSIS LTD.; WO2007/148093; (2007); A1;,
Bromide – Wikipedia,
bromide – Wiktionary

7745-91-7, Adding a certain compound to certain chemical reactions, such as: 7745-91-7, name is 3-Bromo-4-methylaniline, belongs to bromides-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 7745-91-7.

Step 1 : 3-bromo-4-methylaniline (1.0 equiv), hexane-2,5-dione (1.1 equiv.) and -TsOH (0.05 equiv.) were combined in toluene (0.4 M) and the mixtore heated in Dean- Stark at 150 C. After 35 min, the reaction mixture was cooled to room temperature. The reaction mixture was let to age at room temperature for 60 h and then concentrated in vacuo. The residue was purified by flash chromatography (0-10% EtO Ac/heptane to afford the desired product 1 -(3 -bromo-4-methylphenyl)-2,5 -dimethyl- lH-pyrrole in 92% yield. LCMS (m/?) (M+H) = 265.8, Rt = 1.13 min.

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, 3-Bromo-4-methylaniline, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; NOVARTIS AG; AVERSA, Robert John; BURGER, Matthew T.; DILLON, Michael Patrick; DINEEN JR., Thomas A.; LOU, Yan; NISHIGUCHI, Gisele A; RAMURTHY, Savithri; RICO, Alice C.; RAUNIYAR, Vivek; SENDZIK, Martin; SUBRAMANIAN, Sharadha; SETTI, Lina Quattrocchio; TAFT, Benjamin R.; TANNER, Huw Rowland; WAN, Lifeng; (307 pag.)WO2016/38582; (2016); A1;,
Bromide – Wikipedia,
bromide – Wiktionary

Adding a certain compound to certain chemical reactions, such as: 876-53-9, name is 1,3-Dibromoadamantane, belongs to bromides-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 876-53-9, 876-53-9

1. Under nitrogen protection, 440 g of 1,3-dibromoadamantane was added to a 10 L four-necked flask. Then 2.0 L of dichloroethane was added and stirred well, 500 g of acetanilide was added and stirred well. Add zinc dichloride slowly and stir it well, then heat up to reflux (internal temperature 80-85C). Partially separate the water with a water separator and then use a reflux device. After refluxing at this temperature for 24 hours, the lower layer was a viscous solid and the upper layer was a dichloroethane solvent. Cool to room temperature, pour off the upper layer of solvent, add 1.0L DMF (N,N-dimethylformamide) to raise the temperature to a solid slurry, and slowly pour the slurry into 4.0L of stirring water. Stir 30%. Filter after minutes The solid crude product was obtained in a wet weight of 1219 g. The solid was added to 6 L of water for beating for 3.5 hours, filtered and pumped until no liquid was dripped, and then washed with water (2¡Á2 L). 1332 g of crude wet weight was obtained, refluxed with two-fold volume of ethanol (3 L) for 1 hour, cooled to room temperature and stirred at room temperature for 1 hour, filtered to dry wet weight 522 g and used directly for the second reaction.

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, 1,3-Dibromoadamantane, other downstream synthetic routes, hurry up and to see.

Reference:
Patent; Shanghai Bodong Chemical Technology Co., Ltd.; Fu Zhiwei; He Baoyuan; Pan Xingang; Yu Wenqing; Li Yongli; Lu Wei; (7 pag.)CN107673977; (2018); A;,
Bromide – Wikipedia,
bromide – Wiktionary

1003-98-1, 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. 1003-98-1 name is 2-Bromo-4-fluoroaniline, 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.

2-Propyl-3-propyl-5-fluoro-1H-indole; A 50 mL three neck flask was charged with palladium acetate (22.4 mg, 0.1 mmol), dtbpf (94 mg, 0.2 mmol), potassium carbonate (690 mg, 5 mmol), 2-bromo-4-fluoroaniline (380 mg, 2 mmol), 4-octyne (264 mg, 2.4 mmol) and NMP (10 ml). The mixture was purged with argon and heated to 130 C. After 1 hr, the reaction mixture was cooled to rt. Ethyl acetate and water were added. The organic layer was separated and the aqueous layer was extracted with ethyl acetate. The combined organic phases were washed with water, brine and dried with MgSO4. Removal of the solvents and purification of the crude by column chromatography afforded the desired product as yellow oil (355 mg, containing 4.3 wt % AcOEt). The corrected yield was 77.6%. 1H NMR (400 MHz): delta=7.68 (s, 1H), 7.16-7.13 (m, 2H), 6.83 (td, 1H, J=9.2 Hz, J=2.4), 2.68 (t, 2H, J=7.6 Hz), 2.61 (t, 2H, J=7.6), 1.72-1.57 (m, 4H), 0.98 (t, 3H, J=7.2 Hz), 0.95 (t, 3H, J=7.2 Hz).

The basis of chemical reaction formula synthesis, the synthesis route is composed of some specific reactions and combined according to certain logical thinking. We look forward to the emergence of more reaction modes in the future.

Reference:
Patent; Boehringer Ingelheim International GmbH; US2005/209465; (2005); A1;,
Bromide – Wikipedia,
bromide – Wiktionary