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CAS No. : | 103058-87-3 | MDL No. : | MFCD05663521 |
Formula : | C7H6BrNO2 | Boiling Point : | No data available |
Linear Structure Formula : | - | InChI Key : | VRNOWEKCASDTFG-UHFFFAOYSA-N |
M.W : | 216.03 | Pubchem ID : | 1516403 |
Synonyms : |
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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 |
---|---|---|
With potassium hydroxide; In tetrahydrofuran; methanol; water; | EXAMPLE 7 To a solution of 6.5 g of <strong>[103058-87-3]5-bromo-2-methoxypyridine-3-carboxaldehyde</strong> in 30 ml of tetrahydrofuran under nitrogen was added 200 ml of methanol followed by 4.6 g of 4-chloroacetophenone. Then, a solution of 6.6 g of 85% potassium hydroxide in 15 ml of water was added. The mixture warmed, became yellow, and deposited a thick precipitate. It was then stirred mechanically for about 1.5 hours until the temperature fell back to about 25 C. It was then further cooled in an ice bath and neutralized by the addition of 20 ml of aqueous 5M hydrochloric aid in small portions. The resulting pasty mixture was poured into 400 ml of water, acidified to a pH of 1 with aqueous 1N hydrochloric acid and then filtered. The moist product was boiled with 2-propanol/ethyl acetate (3:1), cooled and filtered. The filter cake was dried under reduced pressure to give (E)-3-(5-bromo-2-methoxy-3-pyridinyl)-1-(4-chlorophenyl)-2-propen-1-one as a pale yellow solid melting at about 168.5-171.5 C. |
Yield | Reaction Conditions | Operation in experiment |
---|---|---|
A solution of <strong>[103058-87-3]5-bromo-2-methoxy-pyridine-3-carbaldehyde</strong> (0.87 g, 4.03 mmol) in dry MeOH (15 mL) was treated with 4-p-tolyloxy-phenylamine (0.88 g, 4.43 mmol) and reflux for 2.5 h. The solution was cooled to 0 C. and treated slowly with NaBH4 (0.38 g, 10.1 mmol). The reaction stirred at room temperature overnight. Additional NaBH4 (0.38 g, 10.1 mmol) was added and the reaction was continued stirring for additional 6 h. The solvent was removed and the residue was partitioned between CH2Cl2 (20 mL) and water (10 mL). The organic portion was brought to the usual work-up to give a crude material. The product was yielded after chromatography purification (silica gel, 25% EtOAc/hexanes). MS (EI) 399, 401 (M+H)+. |
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