Liu, Chang-chun published the artcileFacile synthesis of 3,4-dihydroxybenzaldehyde in ionic liquid, Application of Mono(N,N,N-trimethyl-1-phenylmethanaminium) tribromide, the publication is Gaoxiao Huaxue Gongcheng Xuebao (2011), 25(4), 724-728, database is CAplus.
A facile one-pot method for synthesis of 3,4-dihydroxybenzaldehyde (I) from p-hydroxybenzaldehyde (II) via bromination and hydrolysis in ionic liquid was studied. Under the conditions of the molar ratio of II/ionic liquid 1-butyl-3-methylimidazolium tribromide ([bmim]Br3) 1:1, reaction temperature 20°, reaction time 30 min and solvent-free, the II was brominated with ionic liquid [bmim]Br3 to give 3-bramo-4-hydroxybenzaldehyde with 99.7% selectivity; and then without separation, the product of bromination was further hydrolyzed with NaOH aqueous solution in ionic liquid 1-butyl-3-methylimidazolium bromide ([bmim]Br), which is formed from [bmim]Br3 after the process of bromination, to form I with 84.7% yield and 99.3% purity under the conditions as follows: the NaOH dosage is 1.25 mol/(mol II)-1, reaction temperature is 100° and reaction time is 2 h. The ionic liquid can be reused at least six times without significant decrease of the yield and purity of I. This method has the advantages of convenience, mild reaction conditions, good yield, high selectivity, solvent-free and environmental friendliness.
Gaoxiao Huaxue Gongcheng Xuebao published new progress about 111865-47-5. 111865-47-5 belongs to bromides-buliding-blocks, auxiliary class Benzenes, name is Mono(N,N,N-trimethyl-1-phenylmethanaminium) tribromide, and the molecular formula is C10H16Br3N, Application of Mono(N,N,N-trimethyl-1-phenylmethanaminium) tribromide.
Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary