2-Aminopyridine → 6-Aminopyridine-3-sulfonyl chloride

HRID 1838053ノート

反応式

HRID 1838053 の反応式
[Cl:1][S:2]([OH:5])(=O)=[O:3].[NH2:6][C:7]1[CH:12]=[CH:11][CH:10]=[CH:9][N:8]=1.S(Cl)(Cl)=O.C(=O)(O)[O-].[Na+]>>[NH2:6][C:7]1[N:8]=[CH:9][C:10]([S:2]([Cl:1])(=[O:5])=[O:3])=[CH:11][CH:12]=1

参加物

5

反応物 4

HCID 104392-AminopyridineHCID 24386Thionyl ChlorideHCID 24638Chlorosulfonic acidHCID 516892Sodium Bicarbonate

生成物 1

HCID 121090746-Aminopyridine-3-sulfonyl chloride収率 32.2%

反応条件

温度
150 °C

実験手順

To 123.8 g (1.06 mol) of chlorosulfonic acid was added 10.00 g (0.106 mol) of 2-aminopyridine by portions under ice-cooling. Thionyl chloride (50.56 g, 0.425 mol) was added thereto, followed by heating under reflux for 2.5 hours and further stirring at 150° C. for 7 hours. The reaction solution was poured onto ice water, neutralized by adding sodium bicarbonate thereto and extracted with ethyl acetate. The organic layer was washed with a saturated sodium bicarbonate solution, water and brine successively, dried over magnesium sulfate and then concentrated to dryness. The resulting residue was suspended in ethyl ether and the insoluble matters were filtered off. The filtrate was concentrated to dryness and the resulting residue was recrystallized from ethyl ether-hexane to give 6.58 g of the title compound.

後処理

  1. temperaturecooling
  2. temperatureby heating
  3. temperatureunder reflux for 2.5 hours
  4. additionThe reaction solution was poured onto ice water
  5. extractionextracted with ethyl acetate
  6. washThe organic layer was washed with a saturated sodium bicarbonate solution, water and brine successively
  7. dry with materialdried over magnesium sulfate
  8. concentrationconcentrated to dryness
  9. filtrationthe insoluble matters were filtered off
  10. concentrationThe filtrate was concentrated to dryness
  11. customthe resulting residue was recrystallized from ethyl ether-hexane

出典と根拠

ORDレコード
ord-52391d3dc36c47c1b76a25521b0e5e31
出典データセット
uspto-grants-2004_01
特許番号
US06673787B2

反応ノート

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