Cesium carbonate → 2-Chloro-5-[(2,2,5-trimethyl-1,3-dioxan-5-yl)methoxy]pyrimidine

HRID 715908ノート

反応式

HRID 715908 の反応式
[Cl:1][C:2]1[N:7]=[CH:6][C:5]([OH:8])=[CH:4][N:3]=1.C(=O)([O-])[O-].[Cs+].[Cs+].CS(O[CH2:20][C:21]1([CH3:29])[CH2:26][O:25][C:24]([CH3:28])([CH3:27])[O:23][CH2:22]1)(=O)=O>CN(C)C=O>[Cl:1][C:2]1[N:7]=[CH:6][C:5]([O:8][CH2:20][C:21]2([CH3:29])[CH2:26][O:25][C:24]([CH3:28])([CH3:27])[O:23][CH2:22]2)=[CH:4][N:3]=1

参加物

5

反応物 3

HCID 10796Cesium carbonateHCID 145957002-Chloro-5-pyrimidinolHCID 866824725-(Methanesulfonyloxymethyl)-2,2,5-trimethyl-1,3-dioxane

生成物 1

HCID 866824712-Chloro-5-[(2,2,5-trimethyl-1,3-dioxan-5-yl)methoxy]pyrimidine収率 30.2%

試薬・触媒・溶媒 1

HCID 6228Dimethylformamide溶媒

反応条件

温度
90 °C

実験手順

To a solution of 9.50 g (72.8 mmol) of 2-chloro-5-hydroxypyrimidine in 100 ml of N,N-dimethylformamide, 26.1 g (80.1 mmol) of cesium carbonate and 24.3 g (102 mmol) of 5-(methanesulfonyloxymethyl)-2,2,5-trimethyl-1,3-dioxane, which was synthesized by the method described in V. W. Gash, Journal of Organic Chemistry, 1972, Vol. 37, pp. 2197-2201, were added, and the reaction solution was stirred at 90° C. for 24 hours. After completion of the reaction, the insoluble material was filtered off and washed with ethyl acetate, and then 0.5 N sodium hydroxide aqueous solution was added to the filtrate and separation was performed. The obtained aqueous layer was further extracted with ethyl acetate. The obtained organic layers were combined, washed with water and saturated sodium chloride aqueous solution in order and dried with anhydrous magnesium sulfate, and then the solvent was distilled off under reduced pressure. Toluene was added to the obtained residue, and the precipitate was obtained by filtration and washed with toluene and n-heptane to provide 6.00 g of the title compound as a white solid (yield: 30%).

後処理

  1. addition2197-2201, were added
  2. customAfter completion of the reaction
  3. filtrationthe insoluble material was filtered off
  4. washwashed with ethyl acetate
  5. addition0.5 N sodium hydroxide aqueous solution was added to the filtrate and separation
  6. extractionThe obtained aqueous layer was further extracted with ethyl acetate
  7. washwashed with water and saturated sodium chloride aqueous solution in order
  8. dry with materialdried with anhydrous magnesium sulfate
  9. distillationthe solvent was distilled off under reduced pressure
  10. additionToluene was added to the obtained residue
  11. customthe precipitate was obtained by filtration
  12. washwashed with toluene and n-heptane

出典と根拠

ORDレコード
ord-e8bf8ad385af4118aa08da84c7c8e0b6
出典データセット
uspto-grants-2015_11
特許番号
US09187450B2

反応ノート

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