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Benzaldehyde is commonly employed as a precursor to prepare various organic compounds, which are used as pharmaceuticals, dyes, perfumes, flavorings, photographic chemicals and plastic additives. It is used as solvent for oils and resins. Benzaldehyde is further used as a building block for a range of amino acids like phenylglycine, which is used as a side chain in various antibiotics. It is involved as a brightener in zinc electroplating processes, and as a food and fragrance additive. It is active intermediate for the manufacture of benzoic acid, odorants and flavoring chemicals.
For use in protection of amines as benzylidine imines, readily cleaved by acid hydrolysis or hydrogenolysis, see, e.g.: Synthesis, 963 (1989); Synlett, 161 (1990); Org. Synth. Coll., 7, 8 (1990).
Also used for protection of 1,2- and 1,3-diols as cyclic benzylidene acetals, e.g. by azeotroping in the presence of TsOH: J. Am. Chem. Soc., 104, 7036 (1982). See also Benzaldehyde dimethyl acetal, A11009.
Sarma, B. B.; Efremenko, I.; Neumann, R. Oxygenation of Methylarenes to Benzaldehyde Derivatives by a Polyoxometalate Mediated Electron Transfer-Oxygen Transfer Reaction in Aqueous Sulfuric Acid. J. Am. Chem. Soc. 2015, 137 (18), 5916-5922.
Buonaugurio, A.; Zhang, X.; Stokes, S. T.; Wang, Y.; Ellison, G. B.; Bowen, K. H. The photoelectron spectrum of the benzaldehyde anion. Int. J. Mass Spectrom. 2015, 377. 278-280.
Gefahrenhinweise (EU): H227-H302
Combustible liquid. Harmful if swallowed.
Do not get in eyes, on skin, or on clothing.