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CAS No. : | 6228-73-5 | MDL No. : | MFCD00013729 |
Formula : | C4H7NO | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | AIMMVWOEOZMVMS-UHFFFAOYSA-N |
M.W : | 85.10 | Pubchem ID : | 80376 |
Synonyms : |
|
Signal Word: | Warning | Class: | N/A |
Precautionary Statements: | P261-P264-P270-P271-P280-P301+P312+P330-P302+P352-P304+P340+P312-P305+P351+P338-P332+P313-P337+P313-P362-P403+P233-P405-P501 | UN#: | N/A |
Hazard Statements: | H302-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 1-hydroxy-7-aza-benzotriazole; 1-ethyl-(3-(3-dimethylamino)propyl)-carbodiimide hydrochloride; N-ethyl-N,N-diisopropylamine; In dichloromethane; at 0 - 20℃; for 10h; | The cyclopropylamino acid (116mg, 1.35mmol), the compound (2S, 4R) -2- methoxycarbonyl-4-aminopyrrolidine-1-carboxylate (220mg, 0.90mmol), 1- ethyl-3- (3-dimethylaminopropyl) carbodiimidehydrochloride (345mg, 1.80mmol) and N- hydroxy-7-aza-benzotriazole (245mg, 1.80mmol) was dissolved indichloromethane (25mL), and the conditions under 0 ° C, to this solution was added dropwise N, Ndiisopropylethylamine(0.47 mL, 2.70mmol), stirred 10H at room temperature, add water (10mL × 3) washing the organic phase was dried over anhydrous Na 2 SO 4, the solvent was removed, and concentrated It wasseparated by column chromatography (eluent: Petroleumether / EtOAc (v / v) = 3/2), to give 225mg of colorlessliquid: (2S, 4R) -2- methoxy Cyclopropyl-carbonyl-4-carboxamido pyrrolidine-1-carboxylate, yield: 80percent. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
With sulfuric acid; In N,N-dimethyl-formamide; at 30 - 100℃; for 10h;pH 2; | A suspension of compound 9B (22.8 g, 120 mmol) in DMF (100 mL) was adjusted to pH 2 via dropwise addition of concentrated sulfuric acid. Compound 9A (8.5 g, 100 mmol) was added at 30 C and was allowed to stir at 100 C for 10 h. The mixture was poured into H20, extracted with ethyl acetate (150 mL), washed with brine, dried over anhydrous sodium sulfate, filtered, and concentrated in vacuo. The residue obtained was purified using flash column chromatography on silica gel (petroleum ether/ethyl acetate=30: l to 10: 1) to provide compound 9C. 1H- MR (CDC13, 400 MHz): delta ppm 8.19 - 8.39 (m, 1 H), 7.59 - 7.86 (m, 1 H), 4.26 (d, J=7.04 Hz, 2 H), 1.53 - 1.62 (m, 1 H), 1.30 (t, J=7.04 Hz, 3 H), 1.08 - 1.18 (m, 2 H), 0.88 - 1.03 (m, 2 H). MS (ESI) m/z (M+H)+: 218. |
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