反应详情

2-Nitro-4-fluoro-5-(piperazin-1-yl)aniline (5.6 g, 77%) was prepared by a procedure analogous to that described in preparation 1 (step 3) using N-(2-nitro-4-fluoro-5-chlorophenyl)acetamide (7.4 g, 0.03 mol) (obtained in preparation 1, step 2), piperazine (27.2 g, 0.3 mol), potassium hydroxide (2.5 g, 0.045 mol) and dimethyl sulfoxide (30 mL). mp 120-121° C.; IR (KBr) 3334, 1504, 1251 cm-1 ; 1H NMR (CDCl3 +CD3OD) δ 3.00 (t, J=5.4 Hz, 4H, N(CH2)2); 3.20 (t, J=5.6 Hz, 4H, N(CH2)2), 3.82 (brs, 3H, NH), 6.18 (d, J=8.2 Hz, 1H), 7.74 (d, J=13.8 Hz, 1H); Mass (m/z) 240 (M+.).

1. customthat described in preparation 1 (step 3)