2-Tolyl isocyanate → Tert-butyl 4-({[(2-methylphenyl)amino]carbonyl}amino)benzylcarbamate

참여 물질

반응 단계

2-Methylphenylisocyanate (7.57 g, 59.83 mmol) was added dropwise at 0° C. to a solution of (4-amino-benzyl)-carbamic acid tert-butyl ester (13.30 g, 59.83 mmol, prepared analoguous to: Moloney, Gerard P.; Martin, Graeme R.; Mathews, Neil; Mine, Aynsley; Hobbs, Heather; et al. J. Med Chem. 1999, 42, 2504–2526) in 120 mL DCM. The reaction was heated under reflux for 16 h, cooled to r.t. and the precipitated product was collected by filtration and dried in vacuum (19.20 g, 54.00 mmol). M.p. 200–202° C.; TLC (PE/EtOAc 1/1) Rf 0.65; 1H NMR (400 MHz, D6-DMSO) δ 1.39 (s, 9H); 2.24 (s, 3H); 4.06 (d, J=6 Hz, 2H); 6.93 (mc, 1H); 7.12–7.17 (m, 4); 7.32 (mc, 1H); 7.40 (mc, 2H); 7.85 (mc, 1H); 7.90 (s, 1H); 8.98 (s, 1H).

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