Adding a certain compound to certain chemical reactions, such as: 75148-49-1, name is 3-Bromobenzaldehyde Diethyl Acetal, 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 75148-49-1, Quality Control of 3-Bromobenzaldehyde Diethyl Acetal
Step 1: Preparation of 3-(3-fluorooxetan-3-yl)benzaldehyde 3-Bromobenzaldehyde diethyl acetal (1 mL, 4.9 mmol) in dry THF (10 mL) at -78 C. was added 1.6M n-butyl lithium in hexanes (3.4 mL, 5.4 mmol) dropwise. The reaction mixture was stirred at -78 C. for fifteen minutes then added oxetan-3-one (0.353 g, 4.9 mmol) dropwise. The reaction mixture was stirred at -78 C. for thirty minutes. The reaction mixture was diluted with 50 mL saturated ammonium chloride solution and 50 mL ethyl acetate. The layers were shaken and separated and the organic phase was dried over magnesium sulfate, concentrated under reduced pressure to give the desired product, and purified by silica gel chromatography with a gradient to 50% ethyl acetate/hexanes. The crude mixture was dissolved in dry dichloromethane (10 mL), cooled to -78 C., and added diethylaminosulfur trifluoride (0.16 mL, 1.1 mmol) dropwise. The reaction mixture was stirred at -78 C. for thirty minutes. The reaction mixture was warmed to room temperature. The reaction mixture was diluted with 50 mL 1M sodium hydroxide and 50 mL ethyl acetate. The layers were shaken and separated and the organic phase was dried over magnesium sulfate, concentrated under reduced pressure, and purified by silica gel chromatography with a gradient to 30% ethyl acetate/hexanes to give the desired product as a clear colorless oil (0.051 g, 0.28 mmol). 1H NMR (400 MHz, dichloromethane-d2) delta 10.10 (s, 1H), 8.13-8.10 (m, 1H), 7.96-7.92 (m, 1H), 7.92-7.88 (m, 1H), 7.72-7.66 (m, 1H), 5.20
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; AMGEN INC.; CYTOKINETICS, INC.; Ashcraft, Luke; Boezio, Alessandro; Butler, John; Chandra, Aroop; Chuang, Chihyuan; Collibee, Scott E.; Debenedetto, Mikkel; DiMassa, Vincent; Graceffa, Russell; Malinowski, Justin; Moebius, David; Morgan, Bradley P.; Payette, Joshua; Romero, Antonio; St. Jean, JR., David; Vargas, Richard; Yeoman, John; Zhang, Hanmo; (146 pag.)US2019/77793; (2019); A1;,
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem