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CAS No. : | 478148-62-8 | MDL No. : | MFCD18255510 |
Formula : | C8H5NO3 | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | BEVAEUJOJMQCIU-UHFFFAOYSA-N |
M.W : | 163.13 | Pubchem ID : | 22047515 |
Synonyms : |
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Signal Word: | Warning | Class: | N/A |
Precautionary Statements: | P261-P280-P305+P351+P338 | UN#: | N/A |
Hazard Statements: | H302-H315-H319-H332-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 |
---|---|---|
With N-ethyl-N,N-diisopropylamine; HATU; In DMF (N,N-dimethyl-formamide); at 0 - 20℃; for 2.5h; | Acid C9 (1.96 g, 12.0 MMOL), DIEA (6.27 mL, 36.0 mmol), and R- (+)-3- aminoquinuclidine dihydrochloride (2. 42 g, 12.1 mmol) are added to DMF (60 mL), and the reaction is cooled in an ice bath. HATU (4.57 g, 12.0 mmol) is added, the solution allowed to warm to rt over 2.5 h, then CONCENTRATED IN VACUO. The residue is stirred with saturated NAHCO3 (30 mL) for 30 min, then extracted with CHC13 (10 X 50 mL). The combined organic layer is dried (NA2S04) and is concentrated in vacuo. The crude material is chromatographed over 130 g slurry-packed silica gel, eluting with 0.5% ammonium hydroxide in 10% MEOH/CHC13. The appropriate fractions are combined and concentrated to a residue. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With N-ethyl-N,N-diisopropylamine; N-[(dimethylamino)-3-oxo-1H-1,2,3-triazolo[4,5-b]pyridin-1-yl-methylene]-N-methylmethanaminium hexafluorophosphate; In N,N-dimethyl-formamide; | EXAMPLE 1(i-e) (-)-N-[endo-1-azabicyclo[2.2.1]hept-3-yl]furo[2,3-c]pyridine-5-carboxamide To a stirred solution of <strong>[478148-62-8]furo[2,3-c]pyridine-5-carboxylic acid</strong> (400 mg, 0.877 mmol) in anhydrous DMF (10 mL) are added DIEA (626 muL, 3.59 mmol) and endo-[2.2.1]-3-Amine (175 mg, 0.877 mmol). The mixture is cooled to 0 C. in an ice bath, and HATU (333 mg, 0.877 mmol) is added in one portion. The reaction mixture is allowed to warm to rt and stir overnight. The solvent is removed in vacuo, and the residue is partitioned between saturated aqueous K2CO3 solution and CHCl3. The aqueous layer is extracted with CHCl3 (2*). The combined organic layers are washed with brine, dried over Na2SO4, filtered and concentrated in vacuo to give 230 mg solid. The racemic mixture is resolved via chromatography using a Chiralcel OJ column. The amides are converted to their fumarate salt forms as described in Step 1b. The (+)-enantiomer ([alpha]25D 31 (c 0.28, MeOH)) gives rise to Example 1-d, and the (-)-enantiomer ([alpha]25D -31 (c 0.30, MeOH)) gives rise to Example 1-e. For Example 1-d: 1H NMR (400 MHz, CD3OD) delta 8.94, 8.46, 8.14, 7.13, 6.71, 4.75-4.70, 3.86-3.79, 3.48-3.42, 3.28-3.21, 2.21-2.03. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
92% | EXAMPLE 38 N-[(3S)-1-azabicyclo[2.2.2]oct-3-yl]furo[2,3-c]pyridine-5-carboxamide Example 38 is obtained (92% yield) as the free base by coupling acid C18 with (S)-(-)-3-aminoquinuclidine according to Method C with omission of the HCl treatment. HRMS (FAB) calculated for C15H17N3O2+H: 272.1399, found 272.1404 (M+H)+. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
66% | With O-(1H-benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium hexafluorophosphate; N-ethyl-N,N-diisopropylamine; In chloroform; at 20℃; for 16.0h; | First Step Synthesis of N-(1-Azabicyclo[2.2.2]oct-3(R)-yl)furo[2,3-c]pyridine-5-carboxamide To a solution (10 mL) of <strong>[478148-62-8]furo[2,3-c]pyridine-5-carboxylic acid</strong> (0.16 g, 1.0 mmol) in chloroform, o-(benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium hexafluorophosphate (0.57 g, 1.5 mmol), diisopropylethylamine (0.70 mL, 4.0 mmol), and (R)-quinuclidine-3-amine hydrochloride (0.20 g, 1.0 mmol) were added, and the resulting mixture was stirred at room temperature. Sixteen hours later, distilled water was added thereto, and the resultant was then extracted with chloroform. The organic layer was washed with brine, then dried over anhydrous sodium sulfate and concentrated. The obtained crude product was purified by silica gel column chromatography (amine silica gel DM1020, Fuji Silysia Chemical Ltd., chloroform alone to chloroform/methanol=98/2) to obtain the title compound (0.18 mg; 66%) as a colorless liquid. 1H-NMR (400 MHz, CDCl3) delta: 1.40-1.55 (1H, m), 1.65-1.74 (2H, m), 1.80-1.90 (1H, m), 2.02-2.06 (1H, m), 2.63-2.70 (1H, m), 2.75-3.00 (4H, m), 3.39-3.46 (1H, m), 4.12-4.20 (1H, m), 6.89-6.92 (1H, m), 7.80 (1H, d, J=2.0 Hz) 8.25-8.35 (1H, m), 8.46-8.49 (1H, m), 8.75-8.78 (1H, m).MS (ESI) [M+H]+272 |
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