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CAS No. : | 1117-71-1 | MDL No. : | MFCD00000246 |
Formula : | C5H7BrO2 | Boiling Point : | - |
Linear Structure Formula : | - | InChI Key : | RWIKCBHOVNDESJ-NSCUHMNNSA-N |
M.W : | 179.01 | Pubchem ID : | 5369175 |
Synonyms : |
|
Signal Word: | Danger | Class: | 8 |
Precautionary Statements: | P501-P210-P264-P280-P370+P378-P303+P361+P353-P301+P330+P331-P363-P304+P340+P310-P305+P351+P338+P310-P403+P235-P405-P403+P235-P405 | UN#: | 1760 |
Hazard Statements: | H314-H227 | Packing Group: | Ⅲ |
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 iodine; In benzene-ether-tetrahydrofuran; | Reference Example 14 Production of 5-[4-(tert-butoxycarbonyl)phenyl]-5-hydroxy-2-hexenoic acid: To a suspension obtained by adding a solution of <strong>[105580-41-4]4-acetylbenzoic acid tert-butyl ester</strong> (7.82 g) in benzene-ether-tetrahydrofuran (3:3:2, 80 ml) to 4.64 g (71 mmol) of zinc, were added gradually under heating and stirring 4-bromocrotonic acid methyl ester (6.36 g) and iodine (20 mg). After reflux under heating in an oil bath at 70 C. for 1 hour, methyl 4-bromocrotonate (2.13 g) and zinc (1.55 g) were added, followed by reflux under heating for 30 minutes. The temperature was cooled down to room temperature, and the reaction mixture was poured into water (300 ml) and adjusted to pH 5 with acetic acid. The organic layer obtained by extraction with ether was washed with 5% aqueous ammonia and then dried over anhydrous magnesium sulfate. The solvent was evaporated under reduced pressure and the resulting residue was purified by column chromatography (support; silica gel, 200 g, developing agent; ethyl acetate:hexane=1:4), to obtain the object compound (9.2 g). IR (Neat): 3480, 2975, 1720, 1700, 1650, 1605 cm-1 1 H-NMR (CDCl3) delta: 1.53 (12H,s), 2.64 (2H,d,j=7Hz), 2.67 (1H,brs), 3.63 (3H,s), 5.80 (1H,d,j=15Hz), 6.80 (1H,dt, j=15Hz,7Hz), 7.45 (2H,d,j=8Hz), 7.90 (2H,d,j=8Hz). |
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