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Chemical Structure| 275386-81-7 Chemical Structure| 275386-81-7

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Chemical Structure| 275386-81-7

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Product Details of [ 275386-81-7 ]

CAS No. :275386-81-7
Formula : C8H5BrN2O3
M.W : 257.04
SMILES Code : O=C1NC2=C(C(Br)=C([N+]([O-])=O)C=C2)C1

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Application In Synthesis of [ 275386-81-7 ]

* 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 [ 275386-81-7 ]

[ 275386-81-7 ] Synthesis Path-Downstream   1~1

  • 1
  • [ 99365-48-7 ]
  • [ 275386-81-7 ]
YieldReaction ConditionsOperation in experiment
96% With sulfuric acid; nitric acid; at -5℃; for 1h; A mixture of concentrated sulfuric acid (3.6 mL) and concentrated nitric acid (0.7 mL) was added slowly to a solution of 4-bromo-1,3-dihydro -2H-indol-2-one (2 g, 9.48 mmol) (prepared according to T. Kosuge et al., Chem. Pharm. Bull.33(4):1414-1418 (1985)) in concentrated sulfuric acid (20 mL) at -5 C, with stirring. The mixture was stirred for an additional 1 h at -5 C, then poured in ice. After standing for 1 h, precipitate formed was collected by filtration and washed with water, and dried in a vacuum oven to give 4-bromo-1,3-dihydro-5-nitro-2H-indol-2-one. (Yield 2.33 g, 96%).
With nitric acid; In sulfuric acid; 4-Bromo-1,3-dihydro-5-nitro-2H-indol-2-one A mixture of concentrated sulfuric acid (3.6 mL) and concentrated nitric acid (0.7 mL) was added slowly to a solution of <strong>[99365-48-7]4-bromo-1,3-dihydro-2H-indol-2-one</strong> (2 g, 9.48 mmol) (see Kosuge et al., supra) in concentrated sulfuric acid (20 mL) at -5 C. with stirring. The mixture was stirred for an additional 1 h at -5 C. then poured into ice. After standing for 1 h, precipitate formed was collected by filtration and washed with water, and dried in a vacuum oven to give the above product. (Yield 2.33 g, 96%).
With nitric acid; In sulfuric acid; Example 4 Synthesis of 4-Bromo-1,3-dihydro-5-nitro-2H-indol-2-one (C) A mixture of concentrated sulfuric acid (3.6 mL) and concentrated nitric acid (0.7 mL) was added slowly to a solution of 4-bromo-1,3-dihydro -2H-indol-2-one (2 g, 9.48 mmol) (prepared according to T. Kosuge et al., Chem. Pharm. Bull. 33(4):1414-1418 (1985)) in concentrated sulfuric acid (20 mL) at -5 C., with stirring. The mixture was stirred for an additional 1 h at -5 C., then poured in ice. After standing for 1 h, precipitate formed was collected by filtration and washed with water, and dried in a vacuum oven to give 4-bromo-1,3-dihydro-5-nitro-2H-indol-2-one. (Yield 2.33 g, 96%).
With nitric acid; In sulfuric acid; C. Synthesis of 4-Bromo-1,3-dihydro-5-nitro-2H-indol-2-one STR32 A mixture of concentrated sulfuric acid (3.6 mL) and concentrated nitric acid (0.7 mL) was added slowly to a solution of 4-bromo-1,3-dihydro -2H-indol-2-one (2 g, 9.48 mmol) (see below) in concentrated sulfuric acid (20 mL) at -5 C. with stirring. The mixture was stirred for an additional 1 h at -5 C. then poured in ice. After standing for 1 h, precipitate formed was collected by filtration and washed with water, and dried in a vacuum oven to give 4-bromo-1,3-dihydro-5-nitro-2H-indol-2-one. (Yield 2.33 g, 96%).

 

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