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Chemical Structure| 16738-06-0

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Product Details of [ 16738-06-0 ]

CAS No. :16738-06-0
Formula : C8H6BrClO2
M.W : 249.49
SMILES Code : ClC(=O)COC1=CC=C(Br)C=C1
MDL No. :MFCD02295745

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Application In Synthesis of [ 16738-06-0 ]

* 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 [ 16738-06-0 ]

[ 16738-06-0 ] Synthesis Path-Downstream   1~2

  • 1
  • [ 1878-91-7 ]
  • [ 16738-06-0 ]
YieldReaction ConditionsOperation in experiment
With oxalyl dichloride;N,N-dimethyl-formamide; at 0 - 20℃; for 1h; Example 29; 2-[(Biphenyl-4-yloxy)acetyI]aminothiophene-3-carboxylic Acid; a) Methyl 2-[(4-Bromophenoxy)acetyl]aminothiophene-3-carboxylate; To a stirred solution of <strong>[1878-91-7](4-bromophenoxy)acetic acid</strong> (5.0 g, 0.022 mol) in dry methylene chloride (80 mL) at 0 0C was added catalytic amount of DMF (5 drops) followed by oxalyl chloride (5.5 mL, 0.065 mol). The resulting yellow solution was stirred at room temperature for 1 h and concentrated under reduced pressure to give the desired acid chloride as a yellow solid which was used directly for next step of reaction. Methyl 2- aminothiophene-3-carboxyIate (3.4 g, 0.022 mol) and a 1.0 M solution of sodium bicarbonate EPO <DP n="52"/>in water (30 niL) were sequentially added to a solution of the acid chloride in methylene chloride. The mixture was stirred at room temperature overnight. To the reaction mixture methylene chloride (100 mL) and water (80 mL) were added. The organic layer was separated and the aqueous layer was extracted with methylene chloride (2 x 100 mL). The combined organic solution was dried, filtered and concentrated to give 7.4 g (92%) of product as a yellowish solid. LC-MS 369.9 (M+l).
With oxalyl dichloride; In dichloromethane; N,N-dimethyl-formamide; at 0 - 20℃; for 1h; To a solution of 4-Bromophenoxyacetic acid (1.20 g, 4.66 mmol) in anhydrous dichioromethane (10 mL) was added oxalyl chloride (0.59 g, 4.66 mmol)followed by a few drops of N,N-dimethylformamide at 0 C. After stirring at room temperature for one hour, a solution of 4-[(4-ethylpiperazin-1-yl)methyl]-3- (trifluoromethyl)aniline (2.50 g, 8.69 mmol) and triethylamine (2.63 g, 26.0 mmol) in anhydrous dichloromethane (10 mL) was added dropwise at 0 C and warmed to room temperature. After 16 h, the reaction mixture was partitioned between water (200 mL)and dichloromethane (100 mL). The aqueous layer was further extracted with dichloromethane (100 mL). The combined organic extracts were washed with brine (400 mL), dried (Na2SO4), the solvent evaporated and the residue purified by flash chromatography (Redisep silica gel, 97:3 CH2C12/MeOH) to afford 2-(4-bromophenoxy)- N- {4-[(4-ethylpiperazin- 1 -yl)methyl] -3 -(trifluoromethyl)phenyl } -acetamide (2.60 g).
With oxalyl dichloride; In dichloromethane; at 0 - 20℃; for 1h; General procedure: To a 0 C stirring solution of substituted aryloxyacetic acid (4a-f, 5.4mmol) in anhydrous dichloromethane (50 mL) was slowly added oxalyl chloride (8 mmol) dropwise. After the reagent addition was complete, the ice bath was removed and the solution was allowed to stand at room temperature for 1 h. The solvent was removed under vacuum to obtain corresponding acyl chloride 5a-f sufficiently pure to be used directly in the next step of the reaction. To a stirred solution of corresponding 1-(substitutedbenzhydryl)piperazine (9a-d, 8mmol), triethylamine (6.8 mL) in dry acetone (30 mL) was slowly added acyl chloride 5a-f, dissolved in anhydrous acetone (30 mL). The mixture was stirred at room temperature for 16h and filtered off. The filtrate was evaporated and purified by column chromatography with AcOEt/petroleum ether (2/1) to give diphenylmethyl-substituted aryloxy acetylpiperazine analogs 10a-s, yield of33-84%.
With thionyl chloride; N,N-dimethyl-formamide;Reflux; Equimolar (5-7 mmol) NaOH and substituted phenol was dissolved in 15 mL water followed by the addition of equimolar (5-7 mmol) NaOH and bromoacetic acid in 15 mL water. The solution was refluxed for 4-8 h, allowed to cool to RT, acidified with concentrated H2SO4 and extracted with ethyl acetate (3×15 mL). The organic layer was extracted with saturated NaHCO3 (3×20 mL). The aqueous layer was acidified with con. HCl followed by extraction with ethyl acetate (3×15 mL), dried over anhydrous MgSO4 and solvent removed under vacuum resulting in the substituted phenoxyacetic acid (e.g., compound 1d of Scheme 1, above). A solution of the phenoxyacetic acid in 20 mL SOCl2 and a drop of dimethyl formamide was refluxed for 3-6 h then excess SOCl2 removed by distillation to give the crude acyl chloride (e.g., compound 1e of Scheme 1, above). A solution of acyl chloride in 15 mL anhydrous acetone was added to a solution of sodium isothiocyanate in ice cold anhydrous acetone and stirred at RT for 3 h to give the acyl isothiocyanate followed by the addition of 4-amino-N-(4,6-dimethyl-2-pyrimidinyl)benzenesulfonamide. After stirring overnight, the solution was poured onto ice and recrystallized in dichloromethane and methanol to give the thiourea product. 4-Bromophenol (1 g, 5.8 mmol) to afford 10 <strong>[1878-91-7](4-bromophenoxy)acetic acid</strong> (1.27, 95%) as a white solid. 1H NMR (400 MHz, CDCl3) delta 7.41 (d, J=11.1 Hz, 2H), 6.81 (d, J=9.1 Hz, 2H), 4.67 (s, 2H). 10 <strong>[1878-91-7](4-bromophenoxy)acetic acid</strong> (1.5 g, 6.5 mmol) to afford the title thiourea (0.06 g, 2%) as a white 12 solid. 1H NMR (400 MHz, DMSO-d6) delta 12.30 (s, 1H), 11.76 (s, 1H), 8.04 (d, J=8.7 Hz, 2H), 7.90 (d, J=8.7 Hz, 2H), 7.53 (d, J=9.04 Hz, 2H), 7.00 (d, J=9.08 Hz, 2H), 6.81 (s, 1H), 4.95 (s, 2H), 2.31 (1, 6H). 13C NMR (DMSO-d6) delta 178.3, 169.6, 157.0, 132.2, 128.6, 123.5, 116.8, 112.7, 66.1.

  • 2
  • [ 16738-06-0 ]
  • [ 74205-82-6 ]
  • [ 1623130-93-7 ]
 

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