Aluminium lithium hydride → 2-chloro-3-fluoro-N-methylaniline

To a stirred suspension of 95% lithium aluminum hydride (2.19 g, 58 mmol) in anhydrous THF (10 mL) at 0° C., was added dropwise a solution of N-(2-chloro-3-fluoro phenyl)-formamide (2.3 g, 13.2 mmol) in anhydrous THF (20 mL). The reaction mixture was allowed to slowly warm to room temperature and was stirred for a further 40 mins. The mixture was cooled to 0° C. and was quenched via the sequential addition of water (4 mL), 15% aq. NaOH (2 mL), then water (4 mL). Organics were extracted into a mixture of 3:1 DCM: IPA (100 mL) and washed with water (50 mL). The organic layer was separated and dried over MgSO4. Filtration then concentration in vacuo gave N-methyl-2-chloro-3-fluoroaniline 29-1 (2.07 g, 99%) as a yellow oil. MS (M+H)+: 160.1, tR=2.21 min (method 1).

1. temperatureThe mixture was cooled to 0° C.
2. customwas quenched via the sequential addition of water (4 mL), 15% aq. NaOH (2 mL)
3. extractionOrganics were extracted into a mixture of 3:1 DCM
4. washIPA (100 mL) and washed with water (50 mL)
5. customThe organic layer was separated
6. dry with materialdried over MgSO4
7. filtrationFiltration
8. concentrationconcentration in vacuo

ORD record

ord-6f6fc772037341caa7d685809b99c488

Source dataset

uspto-grants-2013_07

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08481738B2