Thionyl Chloride → 3-(chloromethyl)-N-methylbenzamide

Temperature

90 °C

5 g (29.31 mmol) of 3-chloromethylbenzoic acid were suspended in 20 ml of abs. toluene, 5.23 g (43.96 mmol) of thionyl chloride were added dropwise and the mixture was stirred at 90° C. overnight. After cooling to RT, excess thionyl chloride and toluene were evaporated and the residue was dried under high vacuum for 1 h. Under argon, the residue was dissolved in 40 ml of abs. dichloromethane and cooled to 0° C., and 2.18 g (32.24 mmol) of methylamine hydrochloride were added. At 0° C., 7.58 g (58.62 mmol) of N,N-diisopropylethylamine were slowly added dropwise, and the reaction mixture was stirred at 0° C. for 15 min. 100 ml of dichloromethane were added, and the reaction mixture was washed three times with water and once with saturated aqueous sodium chloride solution. The organic phase was dried over sodium sulfate, filtered and concentrated using a rotary evaporator.

1. temperatureAfter cooling to RT
2. customexcess thionyl chloride and toluene were evaporated
3. customthe residue was dried under high vacuum for 1 h
4. dissolutionUnder argon, the residue was dissolved in 40 ml of abs
5. temperaturedichloromethane and cooled to 0° C.
6. stirringthe reaction mixture was stirred at 0° C. for 15 min
7. washthe reaction mixture was washed three times with water
8. dry with materialThe organic phase was dried over sodium sulfate
9. filtrationfiltered
10. concentrationconcentrated
11. customa rotary evaporator

ORD record

ord-b847549a4cbb4055be2c21c2572678f7

Source dataset

uspto-grants-2015_11

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US09187428B2