Pentafluorobenzene is a fluorinated benzene with anesthetic properties. Pentafluorobenzene has been shown to potently and reversibly inhibited human α4β2 neuronal nicotinic acetylcholine receptor depe ndent on drug hydrophobicity in Xenopus laevis oocyte. New reaction conditions are described that enable the direct arylation of pentafluorobenzene with sterically encumbered aryl bromides and aryl chlorides. Bis (pentafluoropheny1) methane and tris (pentafluoropheny1) methane were prepared in 77 and 92% yields, respectively, by a Friedel-Crafts reaction of pentafluorobenzene with methylene chloride and chloroform using aluminum chloride as the Lewis acid.
W. F. Beckert,; James U. LoweJr.. Friedel-Crafts alkylation of pentafluorobenzene. J. Org. Chem.,. 1967, 32 (4),1212-1215.
Marc Lafrance,; Daniel Shore,; Keith Fagnou. Mild and General Conditions for the Cross-Coupling of Aryl Halides with Pentafluorobenzene and Other Perfluoroaromatics. Org. Lett. 2006, 8(26) ,5097-5100.
Used for the introduction of the pentafluorophenyl group via pentafluorophenyllithium, stable at low temperatures. Review of the effects of the pentafluorophenyl group on reactivity: Fluorine Chem. Rev., 8, 1 (1977).
Hazard Statements: H225-H302-H315-H319-H335
Highly flammable liquid and vapour. Harmful if swallowed. Causes skin irritation. Causes serious eye irritation. May cause respiratory irritation.
Precautionary Statements: P210-P233-P235-P240-P241-P242-P243-P261-P264b-P270-P271-P280-P301+P312-P303+P361+P353-P304+P340-P305+P351+P338-P312-P330-P332+P313-P337+P313-P363-P370+P378q-P501c
Keep away from heat/sparks/open flames/hot surfaces. - No smoking. Keep container tightly closed. Keep cool. Ground/bond container and receiving equipment. Use explosion-proof electrical/ventilating/lighting/ equipment. Use only non-sparking tools. Take precautionary measures against static discharge. Avoid breathing dust/fume/gas/mist/vapours/spray. Wash face, hands and any exposed skin thoroughly after handling Do not eat, drink or smoke when using this product. Use only outdoors or in a well-ventilated area. Wear protective gloves/protective clothing/eye protection/face protection. IF SWALLOWED: Call a POISON CENTER or doctor/physician if you feel unwell. IF ON SKIN (or hair): Remove/Take off immediately all contaminated clothing. Rinse skin with water/shower. IF INHALED: Remove to fresh air and keep at rest in a position comfortable for breathing. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Rinse mouth. If skin irritation occurs: Get medical advice/attention. If eye irritation persists: Wash contaminated clothing before reuse. In case of fire: Use CO2, dry chemical, or foam Dispose of contents/ container to an approved waste disposal plant