Reaction of 4-nitrobenzoyl chloride (I) with tert-buty-lamine (II) in ethyl
acetate gives the corresponding amide (III), which is reduced with H-2 ove
r Pd/C in ethanol to yield 4-amino-N-tert-butylbenzamide (IV). Finally, thi
s compound is acylated with acetyl chloride and TEA in ethyl acetate (1-3).
Scheme 1.