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CAS No. : | 35120-18-4 | MDL No. : | MFCD00001322 |
Formula : | C7H11BrO2 | Boiling Point : | No data available |
Linear Structure Formula : | - | InChI Key : | UTVNSHXHFRIXMM-UHFFFAOYSA-N |
M.W : | 207.07 | Pubchem ID : | 97595 |
Synonyms : |
|
Signal Word: | Danger | Class: | 8 |
Precautionary Statements: | P280-P305+P351+P338-P310 | UN#: | 3265 |
Hazard Statements: | H314 | Packing Group: | Ⅱ |
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 |
---|---|---|
85% | In N,N-dimethyl-formamide; at 80℃; for 2h; | General procedure: In a 50 mL round-bottomed flask, 5 g of 2-nitro-5-(trifluoromethyl)phenol (24 mmol; 1 eq) and 6 g of ethyl 1-bromocyclobutanecarboxylate (29 mmol; 1.2 eq) were diluted in 25 mL of DMF. The reaction medium was heated for 6 h at 120 C, 3 days at RT and then 48 h at 120 C. 200 mL of water were added to the reaction medium. The basic aqueous phase was extracted with EtOAc, and the organic phase obtained was washed with water and then dried over MgSO4, filtered and concentrated. 6 .79 g of reaction crude product containing 26% of the crude compound as a mixture with the starting phenol were obtained. This mixture was used directly in the next step. The compound was synthesized according to the protocol described in preparation 68 at 80 C. for 2 h, from 2-bromo-N-[2-hydroxy-4-(trifluoromethyl)phenyl] -3-meth- ylbutanamide (preparation 280), to give 1.9 g of the title compound in the form of a beige powder.12039] Yld: 85%. j2040] ‘H NMR (300 MHz, DMSO-d5) ?ppm 0.94 (d,J=6.8 Hz, 3H) 1.03 (d, J=6.8 Hz, 3H) 2.12-2.27 (m, 1H) 4.49(d, J=5.3 Hz, 1H) 6.99-7.07 (m, 1H) 7.25-7.34 (m, 2H) 11.03(brs, NH).12041] LC-MS: mlz (M-H): 258. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
In N,N-dimethyl-formamide; at 120℃; for 54h; | In a 50 mL round-bottomed flask, 5 g of 2-nitro-5-(trifluoromethyl)phenol (24 mmol; 1 eq) and 6 g of ethyl 1-bromocyclobutanecarboxylate (29 mmol; 1.2 eq) were diluted in 25 mL of DMF. The reaction medium was heated for 6 h at 120 C, 3 days at RT and then 48 h at 120 C. 200 mL of water were added to the reaction medium. The basic aqueous phase was extracted with EtOAc, and the organic phase obtained was washed with water and then dried over MgSO4, filtered and concentrated. 6 .79 g of reaction crude product containing 26% of the crude compound as a mixture with the starting phenol were obtained. This mixture was used directly in the next step. LC-MS: m/z (M+H)+: 334. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
60% | To a 100 mL reaction vial was added 4-chloro-1-methyl-1H-pyrrole [2,3-b]pyridine (2.29 g, 10 mmol).Sodium sulfide (1.17 g, 15 mmol), N-methylpyrrolidone (30 mL), Heat to 80 C and stir the reaction for 3 hours. Then, cesium carbonate (6.52 g, 20 mmol) was added to the reaction flask. And 2-bromocyclobutylacetate (2.15 g, 11 mmol), Continue to react at 100 C for 2 hours, After completion of the reaction, water (150 mL) was added, and the mixture was extracted three times with ethyl acetate (3×100 ml). The organic layers are combined and washed with saturated brine. Dry with sodium sulfate and filter. After rotary distillation, the intermediate was obtained as an intermediate 50.3 (2.11 g), yield 60%. |
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