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It is used as a pharmaceutical intermediate. he reaction of 2?-substituted biphenyl-2-carboxylic acids (where the 2?-substituent is H, CO2H, NO2, Cl, OMe, or CO2Me) with lead tetra-acetate in refluxing benzene solution, under a nitrogen atmosphere, affords 3,4-benzocoumarin as a major organic product.
D. I. Davies.; C. Waring. Cyclisation reactions involving the oxidation of carboxylic acids with lead tetra-acetate. Part I. The conversion of 2?-substituted biphenyl-2-carboxylic acids into 3,4-benzocoumarin. J. Chem. Soc. C. 1967, 1639-1642,.
Tetsutaro Hattori.; Takatsugu Suzuki.; Noriyuki Hayashizaka.; Nobuyuki Koike.; Sotaro Miyano. Convenient Synthesis of Biphenyl-2-carboxylic Acids via the Nucleophilic Aromatic Substitution Reaction of 2-Methoxybenzoates by Aryl Grignard Reagents.Bull. Chem. Soc. Jpn. 1993, 66 (10),3034-3040.
Gefahrenhinweise (EU): H315-H319-H335
Causes skin irritation. Causes serious eye irritation. May cause respiratory irritation.
Avoid breathing dust/fume/gas/mist/vapours/spray. Wear protective gloves and eye/face protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. IF INHALED: Remove to fresh air and keep at rest in a position comfortable for breathing. Store locked up. Dispose of contents/container in accordance with local/regional/national/international regulations.