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. 5905-69-1, name is 1-Bromo-4-(difluoromethoxy)benzene, A new synthetic method of this compound is introduced below., Product Details of 5905-69-1
Step 4) 1-difluoromethoxy-4-{3-[3-(2-fluoro-ethyl)-cyclobutyl]phenyl-ethynyl}benzene {3-[3-(2-Fluoro-ethyl)-cyclobutyl]-phenylethynyl}-triisopropyl-silane (349 mg, 0.973 mmol) was dissolved in THF (2 ml) and treated with a 1M solution of tetrabutylammonium fluoride (TBAF) in THF (2 ml) at room temperature. The crude product obtained from aqueous work-up was placed in a CEM snap top microwave vial and combined with 1-Bromo-4-Difluoromethoxybenzene (300 mg 1.30 mmol), copper iodide (35 mg, 0.131 mmol), tetrakis(triphenylphosphine)palladium (70 mg, 0.060 mmol) and triethylamine (4.3 g, 42.5 mmol). The vial was quickly agitated then irradiated in a CEM Explorer microwave instrument for 30 minutes at 80 C. Purification by column chromatography (gradient; 0%, then 5% EtOAc in hexanes) afforded an oil 178 mg (53%). 1H NMR (400 MHz, DMSO-d6) delta ppm 1.68-1.80 (m, 2H) 1.85-2.11 (m, 2H) 2.17-2.36 (m, 2H) 2.38-2.43 (m, 1H) 3.28-3.65 (m, 1H) 4.24-4.52 (m, 2H) 7.01-7.47 (m, 5H) 7.18 (d, J=8.8 Hz, 2H) 7.58 (d, J=8.8 Hz, 2H).
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; WYETH; US2009/48320; (2009); A1;,
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