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Chemical Structure| 182438-97-7 Chemical Structure| 182438-97-7

Structure of 182438-97-7

Chemical Structure| 182438-97-7

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Product Details of [ 182438-97-7 ]

CAS No. :182438-97-7
Formula : C18H17BrO2
M.W : 345.23
SMILES Code : O=C(C1(CCCCBr)C2=C(C3=C1C=CC=C3)C=CC=C2)O
MDL No. :MFCD20483519
InChI Key :RPMAAHFLBOQCMZ-UHFFFAOYSA-N
Pubchem ID :10712518

Safety of [ 182438-97-7 ]

GHS Pictogram:
Signal Word:Warning
Hazard Statements:H302-H315-H319-H335
Precautionary Statements:P261-P305+P351+P338

Application In Synthesis of [ 182438-97-7 ]

* 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 [ 182438-97-7 ]

[ 182438-97-7 ] Synthesis Path-Downstream   1~2

  • 2
  • [ 373-88-6 ]
  • [ 182438-97-7 ]
  • [ 182438-98-8 ]
YieldReaction ConditionsOperation in experiment
76.1% In a thermometer,In a three-necked flask of a dropping funnel,(25.0 g, 73 mmol), methylene chloride (250 ml), oxalyl chloride (11.0 g, 87 mol) and DMF (5 drops) under nitrogen atmosphere at room temperature for 2 h and the solvent was evaporated under reduced pressure , The residue was dissolved in dichloromethane (50 ml)A solution of trifluoroethylamine hydrochloride (10.9 g, 80 mmol)And triethylamine (31 ml, 220 mmol) in dichloromethane (100 ml). The organic phase was washed with water, 1N HCl solution, saturated aqueous NaHCO3 solution and saturated brine (200 ml x 3 times each), dried over anhydrous Na2SO4, and evaporated to remove the solvent. The residue was purified by silica gel column chromatography (eluent: To give a light yellow oil which was recrystallized from anhydrous ethanol (200 ml) at -5 C and the solid was collected to give the title compound as an intermediate (4) (23.7 g, 76.1%) as a white solid,
73% To a solution of 9-(4-bromobutyl)-9H-fluorene-9-carboxylic acid (200 gm, 0.579 moles) in dichloromethane (4 L) was charged N-methyl morpholine (87.88 gm, 0.87 moles). The reaction mass was cooled to about 0-5C under nitrogen atmosphere and isobutylchloroformate (102.68 gm, 0.75 moles) was added slowly at about 0-5C. The reaction mass was stirred for about 15 min at same temperature and a suspension of 2,2,2-trifluoroethylamine hydrochloride (94.2 gm, 0.70 moles) and N-methyl morpholine (87.88 gm, 0.868 moles) in dichloromethane (1 L) was slowly added. The reaction mass was stirred for about 8-12 hrs at room temperature. After completion of the reaction, water was added to the reaction mass at about 25-30C and the layers were separated. The organic layer was washed with dilute hydrochloric acid followed by water. The organic layer was distilled off under vacuum at about 35-40C to afford a residue. Water was added to the solution of residue in methanol and the obtained mass was stirred. The precipitated solid was filtered and dried under vacuum at about 50-55C for about 12 hrs to afford 180 gm of 9-(4-bromobutyl)-N-(2,2,2-trifluroethyl)-9H-fluorene-9-carboxamide as pale yellow solid (Yield 73 %, HPLC purity 95.40 %).
71% To a solution of Part A(1) acid (60 g, 173 mmol) and DMF (100 µL) in CH2Cl2 (600 mL) under argon at 0C was added oxalyl chloride (104 mL, 2.0M in CH2Cl2, 208 mmol) dropwise. The reaction was stirred at 0C for 10 min, then warmed to room temperature and stirred for 1.5 h. The reaction was concentrated in vacuo to give the crude acid chloride as a yellow oil. To a suspension of 2,2,2-trifluoroethylamine hydrochloride (25.9 g, 191 mmol) in CH2Cl2 (500 mL) at 0C under argon was added triethylamine (73 mL, 521 mmol) followed by dropwise addition of a solution of the crude acid chloride in CH2Cl2 (15 mL). The reaction was stirred at 0C for 1 h, diluted with CH2Cl2 (500 mL), and washed with water (2 x 300 mL), 1N HCl (2 x 300 mL), saturated NaHCO3 (2 x 300 mL), and brine (2 x 300 mL), then dried over MgSO4. Evaporation gave 80 g of a oil which was purified by flash chromatography on silica gel (2.5 kg). The crude product was loaded in a mixture of CH2Cl2 and hexane, and eluted with a step gradient of 10% EtOAc/hexane (4L) to 15% EtOAc/hexane (2L) to 20% EtOAc/hexane (4L). Pure fractions were combined and evaporated to give title compound (52.5 g, 71%) as a white solid (mp 88-92C).
 

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