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Chemical Structure| 1221171-73-8 Chemical Structure| 1221171-73-8

Structure of 1221171-73-8

Chemical Structure| 1221171-73-8

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Product Details of [ 1221171-73-8 ]

CAS No. :1221171-73-8
Formula : C6H3Cl4NO
M.W : 246.91
SMILES Code : ClC(Cl)(Cl)OC1=CN=C(Cl)C=C1
MDL No. :MFCD28954295

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Application In Synthesis of [ 1221171-73-8 ]

* 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 [ 1221171-73-8 ]

[ 1221171-73-8 ] Synthesis Path-Downstream   1~1

  • 1
  • [ 1221171-73-8 ]
  • [ 1206972-45-3 ]
YieldReaction ConditionsOperation in experiment
60% With antimony(III) fluoride;antimonypentachloride; at 120 - 150℃; 2-Chloro-5-trifluoromethoxypyridine (6); 2-Chloro-5-trichloromethoxypyridine (5, 7.4 g, 30.0 mmol) is added dropwise to a molten mixture of SbF3 (10.7 g, 60.0 mmol, 2.0 eq) and SbCl5 (1.4 g, 0.6 mL, 4.6 mmol, 0.15 eq) at 120 0C and stirred for 3 h at 150 0C. GC monitoring indicates 100% conversion and disappearance of byproduct OCF2Cl. The mixture is then cooled to 0 0C and dissolved in dichloromethane (100 mL). The solution is quenched with saturated aqueous solution of sodium hydrogencarbonate (100 mL) and potassium fluoride (20%, 50 mL), the aqueous layer is extracted with dichloromethane (2 x 50 mL). The combined organic layers are dried over sodium sulfate and the solvent is distilled. The crude product is distilled under vacuum to afford pure 2-chloro-5-trifluoromethoxypyridine (6, 3.6 g, 18.0 mmol, 60%) as a colorless oil; b.p. 41-43 C / 20 mbar.1H NMR (CDCl3, 300 MHz): delta = 8.35 (s, 1 H), 7.55 (d, J = 8.7 Hz, 1 H), 7.41 (d, J= 8.7 Hz, 1 H). - 13C NMR (CDCl3, 75 MHz): delta = 149.3, 142.7, 140.1, 131.3, 125.1, 120.2 (q, J= 259 Hz). - MS(EI): m/z = 197 [M+], 162 [M+-Cl].
40% With antimonypentachloride; antimony(III) fluoride; at 120 - 175℃; for 18h; Step 1: (0630) To antimony trifluoride (4.05 g, 23 mmol) and antimony pentachloride (0.22 mL, 1.7 mmol) at 120 C. was added the trichloromethyl ether prepared in step 1 of scheme 25 (2.80 g, 11 mmol). The reaction was warmed to 165 C. under nitrogen and stirred for 14 h and then warmed to 175 C. and stirred for an additional 4 h. The reaction was cooled to room temperature. The resulting solid mass was stirred vigorously with saturated NaHCO3 (aq.) [Gas evolution] and EtOAc. The mixture was filtered through a plug of Celite washing with EtOAc. The filtrate was extracted with EtOAc. The combined organic layers were washed with water and brine, dried (MgSO4), filtered, and concentrated in vacuo. The residue was purified by silica gel chromatography (0-10% EtOAc/hex over 30 minutes) (0.90 g, 40%).
 

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