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Chemical Structure| 26421-32-9 Chemical Structure| 26421-32-9

Structure of 26421-32-9

Chemical Structure| 26421-32-9

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Product Details of [ 26421-32-9 ]

CAS No. :26421-32-9
Formula : C7H8O2S
M.W : 156.20
SMILES Code : O=C(C1=C(C)SC(C)=C1)O
MDL No. :MFCD01860238

Safety of [ 26421-32-9 ]

GHS Pictogram:
Signal Word:Warning
Hazard Statements:H315-H319-H335
Precautionary Statements:P233-P260-P261-P264-P271-P280-P302+P352-P304-P304+P340-P305+P351+P338-P312-P321-P332+P313-P337+P313-P340-P362-P403-P403+P233-P405-P501

Application In Synthesis of [ 26421-32-9 ]

* 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 [ 26421-32-9 ]

[ 26421-32-9 ] Synthesis Path-Downstream   1~3

  • 1
  • [ 26421-44-3 ]
  • [ 26421-32-9 ]
YieldReaction ConditionsOperation in experiment
With Jones reagent; In acetone; at 0 - 20℃; for 6h; To a solution of 2,5-dimethylthiophene-3-carbaldehyde (1.0 g, 7.13 mmol) in acetone (4 ml) cooled to 0 C was added 6 M Jones reagent (1.18 ml, 7.13 mmol). The mixture was allowed to warm to rt and stirred for 6 h. The solution was acidified to pH 5 with 1 M hydrochloric acid, then the resulting mixture was extracted with EtOAc (3 x 10 ml). The combined organic phases were concentrated under reduced pressure to give 2,5-dimethylthiophene-3-carboxylic acid as a brown solid. This was used directly without purification. 1H NMR (400 MHz, chloroform-d) d 7.09 (s, 1H), 2.70 (s, 3H), 2.40 (s, 3H).
  • 2
  • [ 638-02-8 ]
  • [ 26421-44-3 ]
  • sodium dihydrogen phosphate [ No CAS ]
  • [ 26421-32-9 ]
YieldReaction ConditionsOperation in experiment
With dihydrogen peroxide; trichlorophosphate; In N-methyl-acetamide; water; acetonitrile; Reference Example 143 2,5-Dimethyl-3-thiophenecarboxylic Acid Phosphorus oxychloride (10 ml) was slowly added dropwise to dimethylformamide (30 g) under ice-cooling, and 2,5-dimethylthiophene (11.2 g) was added. The mixture was stirred at 100 C. for 15 hours, poured into water and extracted with ethyl acetate. The extract was dried over anhydrous magnesium sulfate and concentrated under reduced pressure. The residue was purified by silica gel column chromatography to give 2,5-dimethyl-3-thiophenecarbaldehyde (1.41 g). 2,5-Dimethyl-3-thiophenecarbaldehyde (3.89 g) synthesised in this manner was dissolved in acetonitrile (30 ml), and sodium dihydrogen phosphate (1.2 g) in water (15 ml) and 30% aqueous hydrogen peroxide (3.5 ml) were added dropwise. The mixture was stirred at room temperature for 2 hours, alkalified with 1N aqueous sodium hydroxide and washed with diethyl ether. The aqueous layer was acidified with 1N hydrochloric acid and extracted with ethyl acetate. The extract was dried over anhydrous magnesium sulfate and concentrated under reduced pressure to give 2,5-dimethyl-3-thiophenecarboxylic acid (4.09 g) as crystals. mp 113-114 C.
  • 3
  • [ 53051-97-1 ]
  • [ 26421-32-9 ]
  • [ 1334597-88-4 ]
 

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