[C:1]([NH2:9])([CH2:4][C:5]([CH3:8])([CH3:7])[CH3:6])([CH3:3])[CH3:2].C(N(CC)CC)C.[N+:17]([C:20]1[CH:28]=[CH:27][C:23]([C:24](Cl)=[O:25])=[CH:22][CH:21]=1)([O-:19])=[O:18]>ClCCl>[N+:17]([C:20]1[CH:21]=[CH:22][C:23]([C:24]([NH:9][C:1]([CH2:4][C:5]([CH3:8])([CH3:7])[CH3:6])([CH3:3])[CH3:2])=[O:25])=[CH:27][CH:28]=1)([O-:19])=[O:18]Tert-octylamine (51.7 g, 0.4 mol) and triethylamine (61.2 ml, 0.44 mol) in 260 ml of dichloromethane were introduced into a reactor. It was heated to 70° C. then 4-nitrobenzoyl chloride (77.9 g, 0.42 mol) was added in small portions over 50 minutes. It was heated under reflux for 4 hours. The reaction mixture was poured over ice water; it was extracted with dichloromethane, dried and the solvent was evaporated off. The beige precipitate obtained was recrystallized from a mixture of isopropyl ether and ethanol (ratio 10:1). After drying under vacuum, 84.6 g (yield: 76%) of 4-nitro-N-(tert-octyl)benzamide were obtained in the form of an off-white powder and used as is in the next step.
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