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Development of large-scale oxidative Bromination with HBr-DMSO by using a continuous-flow microwave system for the subsequent synthesis of 4-Methoxy-2-methyldiphenylamine.
- Source :
-
Journal of Flow Chemistry . Jun2020, Vol. 10 Issue 2, p369-376. 8p. - Publication Year :
- 2020
-
Abstract
- An efficient procedure of continuous-flow microwave reactor, for oxidative bromination with HBr (hydrogen bromide) -DMSO (dimethyl sulphoxide) in large scale is described herein. The reaction is carried out in a metal-free manner, with the use of water as solvent under microwave irradiation conditions. The productivity of this continuous step attains 60 g/min under the optimal conditions, implying a theoretical productivity of 8.6 kg/day. The reaction mixture is screened by thermal insulation accelerometer to ensure the safe process of this reaction in these conditions. 4-Bromo-3-methylanisole is further reacted with formanilide in the presence of cuprous iodide (CuI) and potassium carbonate (K2CO3) to give 4-methoxy-2-methyldiphenylamine, a common intermediate in fine chemical industry such as dye and paper chemistry, in an isolated yield of 65.2%. with more than 200 g scale. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 2062249X
- Volume :
- 10
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Journal of Flow Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 143572180
- Full Text :
- https://doi.org/10.1007/s41981-020-00094-6