反应详情

4-Chloromethyl-2-fluoro-1-triphenylmethylimidazole was dissolved in MeOH, and allowed to stand 1 hour, giving 2-fluoro-4-methoxymethyl-1-triphenylmethylimidazole. This was reacted at 60° for 3 hours in CHCl3 /MeOH solution with t-butyl 3-acetoxymethyl-7-aminoceph-3-em-4-carboxylate in the presence of toluene-p-sulphonic acid, and the product purified by chromatography to give t-butyl 3-acetoxymethyl-7-(4-methoxymethylimidazol-2-yl)aminoceph-3-em-4-carboxylate, having the following n.m.r. spectrum in d6DMSO: 1.5 (s, 9H); 2.05 (s, 3H); 3.3 (s, 3H); 3.5 (d, 1H); 3.7 (d, 1H); 4.3 (s, 2H); 4.7 (d, 1H); 5.0 (d, 1H); 5.2 (d, 1H); 5.7 (d, 1H); 7.1 (s, 1H).