Benzoic acid nitrogen mustard derivative as well as preparation method and application thereof
A technology of benzoen mustard and its derivatives, which is applied in the field of benzoen mustard derivatives and their preparation and application, and can solve the problems of high toxicity and the like
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Embodiment 1
[0024] Example 1: Preparation of N-butyl-4-(two-(2-chloroethyl)amino)benzamide (compound 1)
[0025]
[0026] Get 1mmol benzoen mustard (referring to Chemical Biology & Drug Design, 2007, 70 (3), 216-226; Chemical Reagents, 2004, 26 (3), 183-184 method to prepare benzoic acid mustard) dissolved in 12mL dimethicone In methyl chloride, add 1 mmol N, N-dicyclohexylcarbodiimide (DCC) under stirring at room temperature and stir for 10 min, then add 1 mmol n-butylamine and 0.5 mmol 4-dimethylaminopyridine (DMAP) respectively and stir at room temperature 24h. Filter, wash the filter cake (10mL×3) with dichloromethane, combine the organic phases, evaporate the solvent under reduced pressure, use ethyl acetate-petroleum ether (V:V=1:3-1:8) as the eluent, and use a silica gel column After separation, the solvent was distilled off under reduced pressure to obtain the target compound. White powder, yield 85%. M.p.: 52-54°C. 1 H NMR (300MHz, CDCl 3 ): 0.95(t, J=7.3Hz, 3H); 1.36-1.46...
Embodiment 2
[0027] Example 2: Preparation of N-tert-butyl-4-(bis-(2-chloroethyl)amino)benzamide (compound 2)
[0028]
[0029] The preparation method is the same as in Example 1. The title compound was obtained by replacing n-butylamine with tert-butylamine. White powder, yield 80%. M.p.: 141-143°C. 1 H NMR (300MHz, CDCl 3 ): 1.28(s, 9H); 3.63(t, J=6.6Hz, 4H); 3.76(t, J=6.6Hz, 4H); 5.83(s, 1H); 6.68(d, J=8.9Hz, 2H ); 7.70 (d, J=8.9Hz, 2H); MS (ESI): 318.3 (C 15 h 22 Cl 2 N 2 O, [M+H] + ).Anal.Calcd for C 15 h 22 Cl 2 N 2 O: C, 56.79; H, 6.99; N, 8.83%; Found: C, 56.88; H, 6.72; N, 8.70%.
Embodiment 3
[0030] Example 3: Preparation of N-cyclopentyl-4-(two-(2-chloroethyl)amino)benzamide (compound 3)
[0031]
[0032] The preparation method is the same as in Example 2. The target compound was obtained by replacing n-butylamine with cyclopentylamine. White powder, yield 81%. M.p.: 84-86°C. 1 H NMR (300MHz, CDCl 3 ): 1.67-1.69(m, 4H); 1.70-1.73(m, 4H); 3.64(t, J=6.8Hz, 4H); 3.78(t, J=6.8Hz, 4H); 4.33-4.45(m, 1H); 5.90(s, 1H); 6.67(d, J=8.9Hz, 2H); 7.68(d, J=8.9Hz, 2H).MS(ESI): 330.3(C 16 h 22 Cl 2 N 2 O, [M+H] + ).Anal.Calcd for C 16 h 22 Cl 2 N 2 O: C, 58.36; H, 6.73; N, 8.51%; Found: C, 58.19; H, 6.58; N, 8.64%.
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