Hydrochloric Acid → 4-amino-N-(4-chlorophenyl)-N-methylbenzamide

A solution of 4 ml (ca 40 mmol) of concentrated hydrochloric acid in 50 ml of ethanol and 50 ml of water was added dropwise over 2 hours to a refluxing suspension of 6.34 g 114 mmol, 3 equiv) of iron filings and 11.0 g (37.8 mmol) of N-(4-chlorophenyl)-N-methyl-4-nitrobenzamide in 200 ml of ethanol and 200 ml of water. The mixture was refluxed for 1 hour and allowed to cool to room temperature and then adjusted to a pH of 11 with 10% aqueous sodium hydroxide. The suspension was filtered and the residue washed 3 times with 200 ml of hot ethyl acetate. The solution was evaporated to remove the organics and the aqueous liquid was extracted 3 times with 200 ml of EtOAc. The combined organics were washed twice with 250 ml of water and 100 ml of brine, then dried over MgSO4, filtered and evaporated to obtain 10.4 g of the desired product as an orange solid.

1. temperatureThe mixture was refluxed for 1 hour
2. filtrationThe suspension was filtered
3. washthe residue washed 3 times with 200 ml of hot ethyl acetate
4. customThe solution was evaporated
5. customto remove the organics and the aqueous liquid
6. extractionwas extracted 3 times with 200 ml of EtOAc
7. washThe combined organics were washed twice with 250 ml of water and 100 ml of brine
8. dry with materialdried over MgSO4
9. filtrationfiltered
10. customevaporated

ORD record

ord-77905adf3c914623a54ea740bd096e3b

Source dataset

uspto-grants-1995_05

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US05416112