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Chemical Structure| 53484-16-5
Chemical Structure| 53484-16-5
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Product Details of [ 53484-16-5 ]

CAS No. :53484-16-5 MDL No. :MFCD09027271
Formula : C8H7BrN2 Boiling Point : -
Linear Structure Formula :- InChI Key :QDXJAGXUNYFXRG-UHFFFAOYSA-N
M.W : 211.06 Pubchem ID :23537644
Synonyms :

Safety of [ 53484-16-5 ]

Signal Word:Warning Class:N/A
Precautionary Statements:P280-P305+P351+P338-P310 UN#:N/A
Hazard Statements:H302-H315-H319-H332-H335 Packing Group:N/A
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Application In Synthesis of [ 53484-16-5 ]

* 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.

  • Upstream synthesis route of [ 53484-16-5 ]
  • Downstream synthetic route of [ 53484-16-5 ]

[ 53484-16-5 ] Synthesis Path-Upstream   1~8

  • 1
  • [ 4887-88-1 ]
  • [ 74-88-4 ]
  • [ 53484-15-4 ]
  • [ 53484-16-5 ]
Reference: [1] Journal of Organic Chemistry, 2018, vol. 83, # 12, p. 6334 - 6353
  • 2
  • [ 337915-79-4 ]
  • [ 149-73-5 ]
  • [ 53484-16-5 ]
YieldReaction ConditionsOperation in experiment
54.74% With toluene-4-sulfonic acid In toluene for 2 h; Heating / reflux To a solution of intermediate 2 (5g, 21.6mmol) in EtOH (200ml) was added portionwise SnCI2.2H2O (9.8g, 43mmol) and the mixture was heated under reflux for 4 hours and then concentrated under reduced pressure. The residue was treated with water (200ml) and 1N NaOH (100ml). After extraction with CH2CI2, the organic phase was dried over Na2SO4 and concentrated under reduced pressure. The residue was dissolved in toluene (50ml) and trimethylorthoformate (2.6ml, 24 mmol) and ARTS (0.2g) were added and the mixture was heated under reflux for 2 hours and then concentrated under reduced pressure. The residue was purified by chromatography on silica gel eluting with CH2CI2/MeOH (95/5). The title compound was obtained as a cream powder (2.5g, 54.74percent); m.p. 126-128°C.
54.74% With toluene-4-sulfonic acid In toluene for 2 h; Heating / reflux To a solution of intermediate 2 (5g, 21.6mmol) in EtOH (200ml) was added portionwise SnCl2.2H2O (9.8g, 43mmol) and the mixture was heated under reflux for 4 hours and then concentrated under reduced pressure. The residue was treated with water (200ml) and NaOH 1N (100ml). After extraction with CH2CI2, the organic phase was dried over Na2SO4 and concentrated under reduced pressure. The residue was dissolved in toluene (50ml) and trimethylorthoformate (2.6ml, 24 mmol) and ARTS (0.2g) were added and the mixture was heated under reflux for 2 hours and then concentrated under reduced pressure. The residue was purified by chromatography on silica gel eluting with CH2CI2/MeOH (95/5). The title compoundwas obtained as a cream powder (2.5g, 54.74percent); m.p. 126-128°C
Reference: [1] Patent: WO2004/111036, 2004, A1, . Location in patent: Page 21
[2] Patent: WO2004/111046, 2004, A2, . Location in patent: Page/Page column 18-19
[3] Patent: WO2014/100734, 2014, A1, . Location in patent: Paragraph 00320
[4] Patent: WO2015/200677, 2015, A2, . Location in patent: Paragraph 00459; 00460
  • 3
  • [ 302800-13-1 ]
  • [ 149-73-5 ]
  • [ 53484-16-5 ]
YieldReaction ConditionsOperation in experiment
44%
Stage #1: With tin(ll) chloride In ethanol at 80℃; for 4 h;
Stage #2: With toluene-4-sulfonic acid In toluene at 110℃; for 15 h;
Step 3: 6-Bromo-l-methyl-117-benzoimidazole; [0311] To a suspension of (5-bromo-2-nitro-phenyl)-methyl-amine (1.2 g, 5.19 mmol) in ethanol (25 mL) was added tin(II) chloride (1.97 g, 10.39 mmol). The reaction mixture was stirred at 8O0C for 4h, then it was concentrated in vacuo. To the residue was added toluene (12 mL), trimethyl orthoformate (0.625 mL, 5.71 mmol), and para-toluenesulfonic acid (49 mg, 0.26 mmol). The reaction mixture was stirred at HO0C for 15h, then it was concentrated in vacuo and the residue was adsorbed on silica gel. Purification by flash chromatography on silica gel using a gradient of 0-8percent methanol/dichloromethane afforded 482 mg of 6- bromo-1 -methyl- l//-benzoimidazole as a dark orange solid (44percent yield): 1H NMR (DMSO- EPO <DP n="84"/>d6) δ 3.83 (s, 3H), 7.33 (dd, IH), 7.59 (d, IH), 7.86 (d, IH), 8.21 (s, IH); MS (m/z) 211, 213 [M+H+]+.
Reference: [1] Patent: WO2008/51808, 2008, A2, . Location in patent: Page/Page column 82-83
  • 4
  • [ 64-18-6 ]
  • [ 302800-13-1 ]
  • [ 53484-16-5 ]
YieldReaction ConditionsOperation in experiment
98% With iron; ammonium chloride In isopropyl alcohol for 24 h; Reflux [0444j Step B: Preparation of 6-bromo-1-methyl-benzimidazole: A mixture of 5- bromo-N-methyl-2-nitro-aniline (6.0 g, 26 mmol), iron powder (14.5 g, 260 mmol), ammonium chloride (13.9 g, 260 mmol) and formic acid (49.0 mL, 1298 mmol) in 2- propanol (75 mL) was stirred under reflux for 24 hours. After cooling to ambient temperature, ethyl acetate (50 mL) was added. The solid was removed by filtering through a pad of celite. The filtrate was concentrated. Saturated sodium bicarbonate (20 mL) and ethyl acetate (50 mL) were added. The organic layer was separated, washed with brine, dried (sodium sulfate), filtered and concentrated. The residue was purified by flash chromatography on silica gel 10:1 ethyl acetate/MeOH to give 6-bromo-1-methyl-benzimidazole (5.35 g, 98percent) as solid.
Reference: [1] Patent: WO2015/175845, 2015, A1, . Location in patent: Paragraph 0444
  • 5
  • [ 321-23-3 ]
  • [ 53484-16-5 ]
Reference: [1] Patent: WO2014/100734, 2014, A1,
[2] Patent: WO2015/175845, 2015, A1,
[3] Patent: WO2015/200677, 2015, A2,
  • 6
  • [ 4887-88-1 ]
  • [ 74-88-4 ]
  • [ 53484-15-4 ]
  • [ 53484-16-5 ]
Reference: [1] Journal of Organic Chemistry, 2018, vol. 83, # 12, p. 6334 - 6353
  • 7
  • [ 302800-13-1 ]
  • [ 53484-16-5 ]
Reference: [1] Patent: WO2014/100734, 2014, A1,
[2] Patent: WO2015/200677, 2015, A2,
  • 8
  • [ 53484-16-5 ]
  • [ 26530-93-8 ]
Reference: [1] Patent: WO2016/57834, 2016, A1, . Location in patent: Paragraph 000390
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