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Chemical Structure| 680208-82-6 Chemical Structure| 680208-82-6

Structure of 680208-82-6

Chemical Structure| 680208-82-6

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Product Details of [ 680208-82-6 ]

CAS No. :680208-82-6
Formula : C7H8N2O2
M.W : 152.15
SMILES Code : O=C(O)C1=C(C)N=C(N)C=C1
MDL No. :MFCD09258839

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Application In Synthesis of [ 680208-82-6 ]

* 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 [ 680208-82-6 ]

[ 680208-82-6 ] Synthesis Path-Downstream   1~2

  • 1
  • [ 67-56-1 ]
  • [ 680208-82-6 ]
  • [ 872355-52-7 ]
YieldReaction ConditionsOperation in experiment
0.82 g With sulfuric acid; for 18h;Reflux; [0246] Preparation Example 36: Preparation of methyl 6-amino-2-methylnicotinate[0247][0248] 6-Amino-2-methylnicotinic acid (1.00 g) was suspended in methanol (15 mL), concentrated sulfuric acid (0.5mL) was added, and the mixture was stirred with heating under reflux for 18 hr. The reaction mixture was cooled, aqueoussodium hydroxide solution was added, and the mixture was extracted with chloroform. The organic layer was washedwith saturated brine, and the solvent was evaporated to give the title compound (0.82 g).MS (ESI) m/z:167(M+H)+.
The 6-Amino-2-methyl-nicotinic acid (5.8 g) was dissolved in methyl alcohol (10OmL) and then cooled to 0 0C in an ice-water bath. Thionyl chloride (9 mL) was then added to the solution. The reaction mixture was refluxed for 8 h. After evaporating the methanol, the residue was neutralized with saturated solution of sodium bicarbonate and was extracted with ethyl acetate. The organic layer was washed with water, brine, dried over sodium sulfate and filtered. The filtrate was concentrated to give 4.46 g of the ester (Rf: 0.473 min, Condition B, M+H+: 167).
  • 2
  • [ 67-56-1 ]
  • [ 680208-82-6 ]
  • [ 64-17-5 ]
  • [ 872355-52-7 ]
  • [ 1094346-14-1 ]
YieldReaction ConditionsOperation in experiment
To a suspension of 6-amino-2-methylpyridine-3-carboxylic acid (1.0 g, 6.6 mmol) in ethanol (17 mL) at 0C was added thionyl chloride (1.55 mL, 21.2 mmol). The mixture was warmed to room temperature and then heated to 70C for 18 hours. The reaction mixture was then cooled to room temperature and methanol (6 mL) was added. The reaction mixture was heated to 70C for 16 hours. The reaction mixture was cooled to room temperature and concentrated under reduced pressure. The residue was diluted with ethyl acetate and aqueous saturated sodium bicarbonate. The organics were separated, dried over magnesium sulfate, filtered, and concentrated under reduced pressure. The residue was purified by chromatography on silica gel (0-12% methanol/DCM, linear gradient) to afford a 1 :1 mixture of ethyl 6-amino-2-methylpyridine-3-carboxylate and methyl 6-amino-2-methylpyridine-3- carboxylate. Characterization data for ethyl 6-amino-2-methyIpyridine-3-carboxylate: MS ESI calc'd. for C9Hi3N202 [M + H]+ 181, found 181. Characterization data for methyl 6-amino-2- methylpyridine-3-carboxylate: MS ESI calc'd. for C8HnN202 [M + H]+ 167, found 167. The mixture was used in the subsequent step without further purification.
 

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