Acetyl chloride → HCID 22119058, compound

Participants

Reaction Steps

5.64 ml of dehydrated triethylamine and 2.9 ml of acetyl chloride were added at room temperature to a solution of 7.2 g of N-t-butoxycarbonyl-N-methyl-4-hydroxy-2,3,5-trimethylaniline [prepared as described in step (f) above] in 100 ml of dehydrated tetrahydrofuran, and the resulting mixture was stirred for 1 hour, after which it was allowed to stand overnight. The reaction mixture was then diluted with water and the aqueous mixture was extracted with ethyl acetate. The extract was washed with water and with a saturated aqueous solution of sodium chloride, in that order, after which it was dried over anhydrous magnesium sulfate. The solvent was removed by distillation under reduced pressure, after which the residue was triturated with ice-cooled hexane to cause crystallization. The crystals were collected by filtration and washed with ice-cooled hexane to give 6.25 g of the title compound, melting at 103°-104° C.

Provenance & Evidence