反应详情

Methyl 4-(3,4-di-tert-butoxy-5-chlorobenzamido)benzoate (5) (185 mg, 50%) was prepared from 3,4-di-tert-butoxy-5-chlorobenzoic acid (3) (250 mg, 0.831 mmol) using a procedure essentially the same as in Step (i) for AAA-019 except that methyl 4-aminobenzoate was used instead of methyl 4-amino-2-methylenzoate and TEA (579 μL, 4.16 mmol) was used as base instead of DIPEA: m/z 432 [M−H]− (ES−); 1H NMR (400 MHz, DMSO-d6) δ: 10.54 (1H, s), 7.96 (2H, d), 7.91 (2H, d), 7.86 (1H, d), 7.60 (1H, d), 3.84 (3H, s), 1.41 (9H, s), 1.32 (9H, s).