[C:1]([C:5]1[CH:6]=[C:7]([CH:10]=[CH:11][C:12]=1[OH:13])[CH:8]=[O:9])([CH3:4])([CH3:3])[CH3:2].[Br:14]Br>C(O)(=O)C>[Br:14][C:11]1[CH:10]=[C:7]([CH:6]=[C:5]([C:1]([CH3:4])([CH3:2])[CH3:3])[C:12]=1[OH:13])[CH:8]=[O:9]To 3-tert-butyl-4-hydroxybenzaldehyde (3 gm) in acetic acid (30 ml) was added dropwise bromine (1.5 ml). The mixture was stirred at 25° for 3 hours and the solvent removed in vacuo. Recrystallisation of the residue from aqueous ethanol gave 3-bromo-5-tert-butyl-4-hydroxybenzaldehyde (3.2 gm) m.p. 126°.
Wird geladen…