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Chemical Structure| 16405-99-5 Chemical Structure| 16405-99-5

Structure of 16405-99-5

Chemical Structure| 16405-99-5

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Product Details of [ 16405-99-5 ]

CAS No. :16405-99-5
Formula : C7H5BrN2S
M.W : 229.10
SMILES Code : BrCC1=CC=CC2=NSN=C12
MDL No. :MFCD00457946

Safety of [ 16405-99-5 ]

GHS Pictogram:
Signal Word:Danger
Hazard Statements:H302-H314
Precautionary Statements:P264-P270-P271-P280-P303+P361+P353-P304+P340-P305+P351+P338-P310-P330-P331-P363-P403+P233-P501
Class:8
UN#:3261
Packing Group:

Application In Synthesis of [ 16405-99-5 ]

* 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 [ 16405-99-5 ]

[ 16405-99-5 ] Synthesis Path-Downstream   1~3

  • 1
  • [ 1457-92-7 ]
  • [ 16405-99-5 ]
YieldReaction ConditionsOperation in experiment
96% With N-Bromosuccinimide; In tetrachloromethane; 4-Bromomethyl-2,1,3-benzothiadiazole A mixture of <strong>[1457-92-7]4-methyl-2,1,3-benzothiadiazole</strong> (6.0 g, 40 mmol) and N-bromosuccinimide (7.12 g, 40 mmol) in carbon tetrachloride (80 mL) was refluxed under irradiation with a sunlamp for 8 hours. After cooling with ice-water bath, the succinimide was filtered off and the filtrate was washed with saturated Na2S2O3, brine, dried over Na2SO4. After removal of solvent pure 4-bromomethyl-2,1,3-benzothiadiazole (8.8 g, 96%) was obtained as a light-yellow crystalline powder. Rf=0.45 (hexane/ethyl acetate=4:1); 1H NMR (200 MHz, CDCl3) δ5.00 (s, 2H), 7.57 (m, 2H), 7.98 (d, J1=8.5 Hz, J2=1.2 Hz, 1H); HRMS: Calcd. for C7H5BrN2S 227.9357, found 227.9395.
69% With N-Bromosuccinimide; hydrogen bromide; In 1,1,2,2-tetrachloroethylene; for 6h;Reflux; 15.3 g (102 mmol) of 13 and N-bromosuccinimide (18.86 g/106 mmol/ 1.05 equ.) were dissolved in 200 mL oftetrachlorethylen and 3 droplets of hydrobromic acid (62%) were added. Theresulting brown solution was stirred under reflux over 6 h, as indicatedby TLC (AlOx; toluene:n-heptane /1:1). After cooling to room temperature, an aqueous solution of Na2S2O3was added. The organic phase was extracted with Na2CO3-solutionand water, dried over MgSO4 and concentrated under reduced pressure.The resulting thick solution was diluted with n-pentane and the product crystallized as colorless needles(16.2 g, 71 mmol, 69%). m. p.: 70-72C. 1H-NMR (250 MHz, CDCl3):δ = 7.98 (d, J = 8.7 Hz, 1H), 7.65 (d, J = 6.8 Hz, 1H), 7.61 -7.50 (m, 1H), 5.00 (s, 2H) ppm. 13C-NMR (63 MHz, CDCl3):δ = 155.25, 153.53, 131.00, 129.46, 129.44, 122.09, 77.16, 28.49 ppm. MS (EI): m/z = 228 [M+], 230 [(M+2)+],149 [(M-Br)+]. EA calc. for C7H5BrN2S:C, 36.70; H, 2.20; N, 12.23; found: C, 36.89; H, 2.11; N, 12.35.
41% With N-Bromosuccinimide; 2,2'-azobis(isobutyronitrile); In dichloromethane; at 50℃; for 12h;Reflux; Take compound XD-2 (1.54g) and dissolve it in dichloromethane (50mL),Add N-bromosuccinimide (NBS, 2.2g)And azobisisobutyronitrile (AIBN, 85mg),The reaction was heated to reflux, and the reaction was stopped after 12 hours.The solvent was evaporated under reduced pressure, and the residue was purified by silica gel column chromatography (eluent: petroleum ether/ethyl acetate = 100:1),A white solid compound XD-3 (977 mg) was obtained.
  • 2
  • [ 1457-92-7 ]
  • [ 16405-99-5 ]
  • [ 151869-78-2 ]
  • 3
  • [ 16405-99-5 ]
  • [ 273749-25-0 ]
 

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