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CAS No. : | 347174-05-4 | MDL No. : | MFCD08072959 |
Formula : | C15H22N2O2 | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | UJHBVMHOBZBWMX-UHFFFAOYSA-N |
M.W : | 262.34 | Pubchem ID : | 4068248 |
Synonyms : |
Fer-1
|
Chemical Name : | Ethyl 3-amino-4-(cyclohexylamino)benzoate |
Signal Word: | Warning | Class: | N/A |
Precautionary Statements: | P261-P305+P351+P338 | UN#: | N/A |
Hazard Statements: | H315-H319-H335 | Packing Group: | N/A |
GHS Pictogram: |
* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
80% | With Oxone; In DMF (N,N-dimethyl-formamide); water; at 20℃; for 1h; | The diamine from above (3.20 g, 12.2 mmol) was dissolved in DMF (15 mL) and water (0.5 mL). 2-Pyridine carboxaldehyde (1.45 mL, 15 mmol) was added followed by oxone (0.65 equivalent, 8 mmol, 4.92 g). The mixture was stirred 1 h at room temperature. Water (60 mL) was added, and the pH of the reaction mixture was brought up to 9 by addition of 1 N NaOH. The brown precipitate that formed was collected by filtration, washed with water and dried. The crude benzimidazole ethyl ester was obtained in 80% yield (3.43 g). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
100% | With hydrogen;palladium(II) hydroxide/carbon; In methanol; under 760.051 Torr; for 72h; | The nitro derivative from above (24.28 g, 83 mmol) was hydrogenated (1 atm H2) over 20% Pd(OH)2 on carbon (200 mg) in MeOH (150 mL) for 3 days. The catalyst was removed by filtration and volatiles removed under reduced pressure to give the title diamine (21.72 g, 100% yield) as a dark purple solid. |
85% | With 10% palladium hydroxide on charcoal; hydrogen; In methanol; at 20℃; for 17h; | General procedure B (hydrogenolysis) [0274] The ethyl 4-(substituted-amino)-3-nitrobenzoates (130 mg, 0.445 mmol) were dissolved in MeOH (10 mL) and hydrogenated (H2 gas) over 10% Pd(OH)2 on charcoal (90 mg) for 17 hours at room temperature. The solution was filtered through a pad of celite, and volatiles were removed under vacuum. The residue was purified by flash-column chromatography on silica gel to provide the desired Ferrostatin-1 derivatives. General procedure C (reductive amination reaction) (Abdel-Magid et al., 1996) |
With hydrogen;palladium 10% on activated carbon; In methanol; ethyl acetate; under 1551.49 Torr; for 6h; | Step 8: 3-Amino-4-cyclohexylamino-benzoic acid ethyl ester (Compound 11); [02281 To a solution of 5.84 g (20 mmol) of Compound 10 in 50 mL ethyl acetate and 30 mL methanol, 100 mg of 10% Pd/C was added, and the mixture was hydrogenated at 30 psi for 6 h. The catalyst was removed by filtration through a pad of Celite, the solvent was evaporated to dryness resulting in a dark purple solid which was recrystallized from ether-hexane. The mother liquid was evaporated, and the resulting solid was suspended in hexane and filtered to give additional yield of Compound 11 [02291 MS: 263.18 (M+H) ; H1-NMR (CDCL3): No.(PPM) 7.57-7. 54 (dd, 1H, J=8.7 and 2.1 Hz, Ar-H6), 7. 39 (d, 1H, J=2. 1HZ, AR-H2), 6.57 (d, 1H, J=9.0 Hz, Ar- H5), 4.29 (q, 2H, J=7. 2Hz, CH2), 3.32 (M, 1H,-CH=), 2.05 (M, 2H), 1.77 (M, 2H), 1.66 (M, 2H), 1.42-1. 20 (M, 7H); |
With hydrogen; cyclohexene;palladium on activated carbon; In ethanol; at 83℃; for 3h; | Step 2: 3-Amino-4-cyclohexylaminobenzoic acid, ethyl ester In a 250 mL round bottom flask ethyl 4-(cyclohexylamino)-3-nitrobenzoate (3.01 g, 0.0103 mol) was dissolved in ethanol (40 mL) and 1 gram of 5% palladium on carbon (54.62% water) was added. Cyclohexene (7 mL, 0.07 mol) was then added and the reaction heated at 83 C. for 3 hours. The reaction mixture was filtered through celite and the filter cake washed with ethanol. The combined filtrates were concentrated to give 2.3 g title compound as a brownish tan solid. MS (ESI (+)m/z): 263.11 (M+H+). | |
With 10 wt% Pd(OH)2 on carbon; hydrogen; In methanol; water; at 20℃; for 17h; | General procedure: The ethyl 4-(substituted-amino)-3-nitrobenzoates and derivatives (the nitro compounds 3) (1 equiv.) were dissolved in MeOH (10 mL) and hydrogenated (H2 gas) over 10% Pd(OH)2 on charcoal for 17h at room temperature. The solution was filtered through a pad of celite and volatiles were removed under vacuum. The residue was purified by flash-column chromatography on silica gel, using a mixture of solvent of DCM:MeOH (20:1), to providethe desired AA1-AA8 derivatives (Table 1). |