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CAS No. : | 889676-37-3 | MDL No. : | MFCD00266840 |
Formula : | C6H5BrN2O | Boiling Point : | No data available |
Linear Structure Formula : | - | InChI Key : | SNMZXTXZEQGKBG-UHFFFAOYSA-N |
M.W : | 201.02 | Pubchem ID : | 18419456 |
Synonyms : |
|
Signal Word: | Warning | Class: | |
Precautionary Statements: | P261-P305+P351+P338 | UN#: | |
Hazard Statements: | H302-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 |
---|---|---|
81% | Stage #1: With 1,1'-carbonyldiimidazole In dimethyl sulfoxide at 20℃; for 16 h; Stage #2: With ammonia In water; dimethyl sulfoxide at 0℃; for 1 h; |
Preparation 66-Brom o-nicotinam ideTo a solution of 6-bromo-nicotinic acid (4.8g, 23.8 mmol) in dimethylsulfoxide (20ml) was added at room temperature carbonyldiimidazole (4.8g, 29.6 mmol), and the mixture stirred for 16 hours. To the mixture was added dropwise, with cooling in ice bath, 0.880 ammonia solution (40ml), then the mixture stirred for 1 hour, then poured into water (20ml). The precipitate was filtered, washed with water and dried in vacuo to give the title product as a white solid in 81percent yield, 3.9g.1 HNMR(DMSO-D6, 300MHz) δ: 7.66(br.s, 1H), 7.73(d, 1H), 8.09(m, 1H), 8.15(br.s, 1H), 8.78(d, 1 H). <n="20"/>micro analysis found (percent); C(36.00), 1-1(2.60), N(13.67); C6H5N2Br requires (percent); C(35.84), H(2.51), N(13.93) |
79% | Stage #1: With 1,1'-carbonyldiimidazole In tetrahydrofuran at 20℃; for 3 h; Stage #2: With ammonium hydroxide In tetrahydrofuran at 20℃; |
A suspension of 6-Bromonicotinic acid (2 g) and CDI (1.8 g) in THF was stirred at room temperature. After 3 h the NH4OH (8 mL) were added dropwise to the mixture and stirred at room temperature overnight. Then, the solution was concentrated under reduced pressure. Light yellow solid. HPLC purity: 97.1percent. Yield: 79percent. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
92% | With sodium t-butanolate In 5,5-dimethyl-1,3-cyclohexadiene; ethanol for 4 h; Reflux | A mixture of 2-bromo-5-cyanopyridine (10 mmol, 1.83 g),Sodium tert-butoxide (0 · 1 mmol, 9 · 6 mg)(V: V = 3: 1) in a mixed solvent of xylene / ethanol (V: V = 3: 1). After the reaction was allowed to proceed for 4 hours, the reaction was stopped,After drying, the residue was purified by silica gel column chromatography to give 1.84 g of 2-bromo-5-amidopyridine as a white solid |
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