4-substituted naphthalimide compound and use thereof
A technology of naphthalimide and compound, applied in the field of 4-thiomorpholinyl-1,8-naphthalimide and derivatives thereof, can solve the problems of insufficient similarity, unsatisfactory effect, toxic and side effects and the like
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[0043] The present invention further provides the preparation method of described 4-substituted naphthalimide compounds, comprising the steps of:
[0044] (1) 4-bromo-naphthalic anhydride and R 1H reacts in the presence of an acid-binding agent according to a molar ratio of 1:1.2-1.5 to obtain compound III, the reaction time is 6-12h, the reaction temperature is 80-150°C, the reaction solvent is DMF, and the acid-binding agent is triethylamine; preferably React under nitrogen protection;
[0045]
[0046] (2) Compound III and NH 2 、C 1-6 Alkylamine or (OH, OCH 3 , I, Br, Cl, NO 2 , NH 2 , NHCH 3 , N(CH 3 ) 2 、CH(OCH 3 ) 2 , CN, COOCH 3 、COOC 2 h 5 , R 3 ) replaced by C 1-6 Alkylamine reacts in the presence of an acid-binding agent according to a molar ratio of 1:2-1:5 to prepare Compound I, wherein R 2 (respectively) H, C 1-6 Alkyl, or (OH, OCH 3 , I, Br, Cl, NO 2 , NH 2 , NHCH 3 , N(CH 3 ) 2 、CH(OCH 3 ) 2 , CN, COOCH 3 、COOC 2 h 5 , R 3 ) repla...
Embodiment 1
[0074] Example 1: Preparation of N-ethyl-4-benzylamino-1,8-naphthalimide (compound 1)
[0075]
[0076] (1) Synthesis of Intermediate A1
[0077] Take 1.39g (5mmol) 4-bromo-1,8-naphthalic anhydride, 0.589g (5.5mmol) benzylamine, 0.556g triethylamine, add 15mL DMF, react at 85°C for 6h, cool to room temperature and pour 150mL water, filter with suction. The resulting solid was recrystallized from petroleum ether / ethyl acetate to obtain intermediate A1 (4-benzylamino-1,8-naphthalic anhydride) as a yellow solid with a yield of 80%.
[0078] (2) Synthesis of compound 1
[0079] Take 303mg of intermediate A1, 225mg of ethylamine and 506mg of triethylamine, add 10mL of ethanol, reflux under the protection of nitrogen, spot the plate to follow the reaction (about 5h of reaction), cool, precipitate the solid, filter, and recrystallize the solid with methanol / water, Compound 1 was obtained with a yield of 53%.
[0080] Compound 1 1 H NMR measurement result and mass spectrometry...
Embodiment 2
[0081]Example 2: Preparation of N-n-butyl-4-thiomorpholino-1,8-naphthalimide (compound 2)
[0082]
[0083] (1) Synthesis of Intermediate A2
[0084] Take 1.39g (5mmol) 4-bromo-1,8-naphthalic anhydride, 0.557g (5.5mmol) thiomorpholine, 0.556g (5.5mmol) triethylamine respectively, add 15mL DMF, react at 85°C for 6h, cool After reaching room temperature, pour it into 150mL water and filter it with suction. The resulting solid was recrystallized from petroleum ether / ethyl acetate to obtain intermediate A2 (4-(4-bromophenylmercapto)-1,8-naphthalic anhydride) as a yellow solid with a yield of 75%.
[0085] (2) Synthesis of Compound 2
[0086] Take 299mg (1mmol) of intermediate A2, 365mg (5mmol) of n-butylamine and 506mg (5mmol) of triethylamine respectively, add 10mL of ethanol, reflux under the protection of nitrogen, spot the plate to track the reaction (about 5h of reaction), cool down, and precipitate the solid. After filtration, the solid was recrystallized from methanol...
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