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CAS No. : | 118811-07-7 | MDL No. : | MFCD06796535 |
Formula : | C17H25NO5S | Boiling Point : | No data available |
Linear Structure Formula : | - | InChI Key : | IKOMRHLHPZAEMV-UHFFFAOYSA-N |
M.W : | 355.45 | Pubchem ID : | 15734713 |
Synonyms : |
|
Signal Word: | Warning | Class: | |
Precautionary Statements: | P261-P305+P351+P338 | UN#: | |
Hazard Statements: | H315-H319-H335 | Packing Group: | |
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 potassium carbonate; In DMF (N,N-dimethyl-formamide); at 60℃; | tert-Butyl 4-(tosyloxy)piperidine-1-carboxylate (1.42 g, 4.0 mmol) and 2-chloro-6- hydroxybenzaldehyde (620 mg, 3.3 mmol) were dissolved in N,N-dimethylformamide (20 mL) and potassium carbonate (552 mg, 4.0 mmol ) was added. The reaction mixture was allowed to stir at 60 °C overnight. Ice was added and the mixture was acidified with 6N hydrochloric acid. The mixture was extracted with ethyl acetate and the organic layer was washed with brine. The organic solution was dried over anhydrous sodium sulfate, filtered, and concentrated under reduced pressure. The resulting residue was purified by column chromatography, on silica gel, eluting with 2: 8 ethyl acetate: hexanes to give tert-butyl 4-(3-chloro-2-formylphenoxy)piperidine-1- carboxylate (430 mg) as a white solid. 1H NMR (CDCI3): 10.50 (s, 1H), 7.35 (t, 1H), 7.05 (d, 1H), 6.90 (d, 1H), 4.60 (m, 1H), 3.65 (m, 2H), 3.45 (m, 2H), 1.85 (m, 4H),1.40 ppm (s, 9H). |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
75.68% | With tetrabutylammomium bromide; potassium carbonate; In acetone;Reflux; | To a stirred solution of methyl4-chloro-2-hydroxybenzoate (1.0 g, 5.35 mmol, 1.0 eq)in acetone (10 mL) was added K2C03 (3.69 g, 26.75 mmol, 5.0 eq) followed by tert-butyl 4-(tosyloxy)piperidine-1-carboxylate (step 1, 2.85 g, 8.039 mmol, 1.5 eq) and tetra-nbutylammoniumbromide (0.344 g, 1.07 mmol, 0.2 eq). The reaction mixture was heated to25 reflux for overnight. After completion of the reaction (monitored by TLC), the reactionmixture was evaporated under reduced pressure, diluted with water (20 mL) and extractedwith DCM (3x30 mL). The organic layer was washed with brine solution (20 mL), dried oversodium sulfate, filtered and evaporated under reduced pressure. The residue was purified bysilica gel column chromatography by using 0-3% methanol in dichloromethane gradient. Thefractions containing the expected product were combined and concentrated under reduced5 pressure to obtain the title compound (1.5 g, yield: 75.68%) as a colourless liquid. 1H NMR(300 MHz, CDCb): 8 ppm 7.80 (d, J = 8.1 Hz, IH), 7.34 (d, J = 8.1 Hz, IH), 6.97 (d, J = 7.2Hz, IH), 4.73-4.56 (m, IH), 3.87 (s, 3H), 3.64-3.50 (m, 3H), 3.30-3.20 (m, IH), 1.90-1.60(m, 4H), 1.47 (s, 9H); LC-MS: m/z 370.10 (M+Ht. |
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