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CAS No. : | 4318-42-7 | MDL No. : | MFCD00167971 |
Formula : | C7H16N2 | Boiling Point : | No data available |
Linear Structure Formula : | - | InChI Key : | WHKWMTXTYKVFLK-UHFFFAOYSA-N |
M.W : | 128.22 | Pubchem ID : | 78013 |
Synonyms : |
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Signal Word: | Danger | Class: | 3,6.1 |
Precautionary Statements: | P261-P280-P305+P351+P338-P312 | UN#: | 1992 |
Hazard Statements: | H225-H302+H332-H311-H315-H319-H335 | Packing Group: | Ⅲ |
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 |
---|---|---|
86% | With potassium carbonate; In dimethyl sulfoxide; at 70℃; for 12h; | Step C/lntermediate B113: 1-(1-methylethyl)-4-[2-methyl-5-(methyloxy)-4- nitrophenyl]piperazine; To a solution of <strong>[314298-13-0]1-fluoro-2-methyl-5-(methyloxy)-4-nitrobenzene</strong> (1.3g, 7.03 mmol) in dimethylsulfoxide was added potassium carbonate (1.9g, 14.0 mmol) and isopropylpiperazine (2.0 ml_, 14 mmol). The resulting suspension was warmed at 7O0C for 12 hours, poured into water, and extracted with diethyl ether. The ether layers were washed with aqueous saturated sodium chloride, dried over sodium sulfate, taken to a residue under reduced pressure, and purified by chromatography on SiO2 to afford 1-(1-methylethyl)-4-[2-methyl-5-(methyloxy)-4- nitrophenyl]piperazine (1.78g, 86% yield) as a yellow solid. 1 H NMR (400 MHz, CDCI3) delta ppm 1.11 (d, J=6.60 Hz, 6 H), 2.24 (s, 3 H), 2.72 (s, 4 H), 2.79 (s, 1 H), 3.06 (s, 4 H), 3.93 (s, 3 H), 6.57 (s, 1 H), 7.81 (s, 1 H). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
76% | 1-Isopropylpiperazine (1.06 g, 8.24 mmol) and ethyl-oxazole-5-carboxylate (1.16 g, 8.24 mmol) were added to a suspension of 5 A molecular sieves (8.0 g) in cyclopentyl methyl ether (40 mL) and stirred for 1 h at 55 C. Lyophilised lipase TL (2.0 g) was added, the reaction mixture stirred for 28.75 h, then filtered through glass fibre paper, washed through with cyclopentyl methyl esther (3 x6 mL). The combined filtrate and washings were concentrated under reduced pressure and the crude residue re-slurried in methyl cyclohexane (6 mL), filtered off, washed with methyl cyclohexane (2 x 5 mL), and dried under vacuum to give the title compound (1.40 g, 76%). | |
76% | 1-Isopropylpiperazine (1.06 g, 8.24 mmol) and ethyl-oxazole-5-carboxylate (1.16 g, 8.24 mmol) were added to a suspension of 5 A molecular sieves (8.0 g) in cyclopentyl methyl ether (40 mL) and stirred for 1 h at 55 C. Lyophilised lipase TL (2.0 g) was added, the reaction mixture stirred for 28.75 h, then filtered through glass fibre paper, washed through with cyclopentyl methyl ether (3 x 6 mL). The combined filtrate and washings were concentrated under reduced pressure and the crude residue re-slurried in methyl cyclohexane (6 mL), filtered off, washed with methyl cyclohexane (2 x 5 mL), and dried under vacuum to give the title compound (1.40 g, 76%). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
67.1% | With potassium carbonate; In acetonitrile; at 60 - 65℃;Inert atmosphere; | General procedure: To a mixture of the corresponding secondary amines 4a?4k(0.6 mmol), anhydrous K2CO3 (89.7 mg, 0.65 mmol) in anhydrousCH3CN (7 mL) were added the appropriate intermediates 10?13(0.5 mmol). The reaction mixture was warmed to 60?65 C andstirred for 6?10 h under an argon atmosphere. After complete reaction,the solvent was evaporated under reduced pressure. The residuewas dissolved in water (30 mL) and the mixture was extractedwith dichloromethane (20 mL 3). The combined organic phaseswere washed with saturated aqueous sodium chloride (30 mL),dried over sodium sulfate, and filtered. The solvent was evaporatedto dryness under reduced pressure. The residue was purified on asilica gel chromatography using mixtures of dichloromethane/acetone(30:1) as eluent to afford the corresponding 3,4-dihydro-2(1H)-quinoline-O-alkylamine derivatives TM1?TM31. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
1.38 g | <strong>[357405-75-5]4-Bromo-2,5-difluorobenzaldehyde</strong> (available from Fluorochem, 1 g, 4.52 mmol) and 1- isopropylpiperazine (0.65 mL, 4.54 mmol) in DCM (12 mL) were stirred for 15 mm before addition of sodium triacetoxyborohydride (1.2 g, 5.66 mmol). The resulting solution was stirred for 15 h. Saturated aqueous sodium hydrogen carbonate (30 mL) was then added and the aqueous phase was separared and extracted with DCM (30 mL). The organic phase was dried (hydrophobic frit) andconcentrated under reduced pressure. The residue (yellow oil) still contained some solid (presumed to be inorganics) so it was dissolved in EtOAC (50 mL) and was washed with water (2 x 50 mL). The organic phase was dried (hydrophobic frit) and was concentrated under reduced pressure to afford the title compound (1.38 g) as a yellow oil.LCMS (Method A) Rt = 0.57 mi [M+H] = 333.3/335.3. |