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4-Bromobenzonitrile is used as reagents and solvents. Reaction of 2-propanol, 4-bromobenzonitrile, and NaH in the presence of 1.5 mol % Pd2(dba)3 and 3 mol % (S)-(-)2,2?-bis(di-p-tolylphosphino)- 1,1?-binaphthyl at 50°C afforded 4-isopropoxy- benzonitrile in 80% isolated yield. The synthesis of 4-cyanobiphenyl at room temperature in a flow injection microreactor, using a supported catalyst, without the addition of a base gave a product yield of 67±7% (n=6). This was achieved by injecting 4-bromobenzonitrile. The 3-arylation of 2,5-dimethylthiophene with 4-bromopropiophenone, 4-trifluoromethylbromobenzene or 4-bromobenzonitrile gave 3-5 in only 38-50% yields in Palladium-catalysed direct 3-or 4-arylation of thiophene derivatives using aryl bromides.
Michael Palucki,; John P. Wolf,; Stephen L. Buchwald. Palladium-Catalyzed Intermolecular Carbon-Oxygen Bond Formation:? A New Synthesis of Aryl Ethers. J. Am. Chem. Soc. 1997, 119 (14), 3395-3396.
Gillian M Greenway,; Stephen J Haswell,; David O Morgan,; Victoria Skelton,; Peter Styring. The use of a novel microreactor for high throughput continuous flow organic synthesis. Sensors and Actuators B: Chemical. 2000, (3) ,153-158.
Dichiarazioni di rischio (UE): H301-H312-H331-H315-H319-H335
Toxic if swallowed. Harmful in contact with skin. Toxic if inhaled. Causes skin irritation. Causes serious eye irritation. May cause respiratory irritation.
Dichiarazioni precauzionali: P261-P280-P301+P310a-P305+P351+P338-P405-P501a
Avoid breathing dust/fume/gas/mist/vapours/spray. Wear protective gloves/protective clothing/eye protection/face protection. IF SWALLOWED: Immediately call a POISON CENTER/doctor IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Store locked up. Dispose of contents/container in accordance with local/regional/national/international regulations.