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Chemical Structure| 18386-03-3 Chemical Structure| 18386-03-3

Structure of 18386-03-3

Chemical Structure| 18386-03-3

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Product Details of [ 18386-03-3 ]

CAS No. :18386-03-3
Formula : C9H9BrO3
M.W : 245.07
SMILES Code : O=C(O)CCOC1=CC=CC(Br)=C1
MDL No. :MFCD00774355

Safety of [ 18386-03-3 ]

GHS Pictogram:
Signal Word:Warning
Hazard Statements:H302-H315-H319-H335
Precautionary Statements:P261-P264-P270-P271-P280-P301+P312-P302+P352-P304+P340-P305+P351+P338-P330-P332+P313-P337+P313-P362-P403+P233-P405-P501

Application In Synthesis of [ 18386-03-3 ]

* 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.

  • Downstream synthetic route of [ 18386-03-3 ]

[ 18386-03-3 ] Synthesis Path-Downstream   1~2

  • 1
  • [ 18386-03-3 ]
  • [ 18442-22-3 ]
YieldReaction ConditionsOperation in experiment
60% With polyphosphoric acid; at 80℃; for 2h; Weighed compound 7 (5g), added to a three-necked bottle, and weighed 50mL of polyphosphoric acid into a 100mL three-necked bottle.The reaction system was heated in an oil bath and stirred at 80 C for 2 hours. Lower the system temperature to room temperature,The reaction was quenched by adding 100 mL of water and stirring for 10 minutes, and extracted three times with 100 mL of ethyl acetate.The organic phases are combined, then the organic phase is washed with water and the organic phase washed with saturated sodium chloride.Dried over anhydrous sodium sulfate, filtered and concentrated, the crude product was purified by column chromatography (mobile phase:Ethyl acetate: petroleum ether = 1:3) was purified. 3.1 g (60%) of a yellow solid were obtained.
With phosphorus pentachloride;aluminium chloride; Example 30 7-Bromo-2,3-dihydro-4H-chromen-4-one 2.45 g (10 mmol) of the compound from Example 5 are added to 3.12 g (15.00 mmol) of phosphorus pentachloride. The mixture is stirred at room temperature for O min, resulting in a clear solution. After addition of 2.67 g (20 mmol) of aluminium chloride, the reaction mixture becomes solid. It is heated at 130 C. for 30 min and, after cooling, added to ice and extracted with ethyl acetate. The organic phase is washed with water and saturated aqueous sodium chloride solution, dried over magnesium sulphate and, after removal of the solvent by distillation, purified by column chromatography on silica gel (V 8:2). Recrystallization from cyclohexane/pentane affords 0.78 g (34%) of colourless crystals. 1H-NMR (200 MHz, CDCl3, delta/ppm): 2.80 (t, 2H), 4.55 (t, 2H), 7.15 (dd, 1H), 7.25 (s, 1H), 7.71 (t, 1H). MS (EI POS): 226 [M+].
With polyphosphoric acid; at 70℃; for 2h;Inert atmosphere; Into a 3-L 4-necked round-bottom flask purged and maintained with an inert atmosphere of nitrogen, was placed 3-(3-bromophenoxy)- propanoic acid (195 g, 795.69 mmol, 1.00 equiv), and PPA (2008 g). The reaction was stirred for 2 h at 70C in an oil bath, then slowly poured into 2 L of ice. The resulting solids were collected by filtration, and purified by Prep-SFC (Column, AD-H; mobile phase, (0284) methanol:MeCN=l: l; Detector, UV, 220, 254 nm) to give the title compound
With polyphosphoric acid; at 70℃; for 2h;Inert atmosphere; Into a 3-L 4-necked round-bottom flask purged and maintained with an inert atmosphere of nitrogen, was placed 3-(3-bromophenoxy)-propanoic acid (195 g, 795.69 mmol, 1.00 equiv), and PPA (2008 g). The reaction was stirred for 2 h at 70C in an oil bath, then slowly poured into 2 L of ice. The resulting solids were collected by filtration, and purified by Prep-SFC (Column, AD-H; mobile phase, methanol:MeCN=1:1; Detector, UV, 220, 254 nm) to give the title compound.

  • 2
  • [ 18386-03-3 ]
  • [ 18442-22-3 ]
  • 5-bromo-2,3-dihydro-4H-chromen-4-one [ No CAS ]
YieldReaction ConditionsOperation in experiment
With phosphorus pentaoxide;methanesulfonic acid; at 80℃; for 0.05h; Diphosphorus pentoxide (17.9 g) was added to methanesulfonic acid (82.0 mL), and the compound (15.4 g) obtained in (EXAMPLE 2) <Step 1> was then added to the mixture at 80C. After stirring for 3 minutes, the reaction solution was poured onto ice and extracted with ethyl acetate. The organic layer was washed with water, saturated sodium hydrogencarbonate aqueous solution and brine, and then dried over anhydrous sodium sulfate. The solvent was removed by distillation under reduced pressure and the resulting residue was purified by silica gel column chromatography (eluate; n-hexane : ethyl acetate = 100:0 to 75:25) to give a mixture (9.8 g) of the title compounds (2-2-a and 2-2-b) as a purple solid.
 

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