1,2-Dimethoxyethane → Di-tert-butyl{3-[3-(bromomethyl)isoxazol-5-yl]pyridin-2-yl}imidodicarbonate

HRID 1930772ノート

反応式

HRID 1930772 の反応式
[C:1]([O:5][C:6]([N:8]([C:16]1[C:21]([C:22]2[O:26][N:25]=[C:24]([CH2:27]O)[CH:23]=2)=[CH:20][CH:19]=[CH:18][N:17]=1)[C:9]([O:11][C:12]([CH3:15])([CH3:14])[CH3:13])=[O:10])=[O:7])([CH3:4])([CH3:3])[CH3:2].C(N(CC)CC)C.COCCOC.P(Br)(Br)[Br:43]>O>[C:1]([O:5][C:6]([N:8]([C:16]1[C:21]([C:22]2[O:26][N:25]=[C:24]([CH2:27][Br:43])[CH:23]=2)=[CH:20][CH:19]=[CH:18][N:17]=1)[C:9]([O:11][C:12]([CH3:15])([CH3:14])[CH3:13])=[O:10])=[O:7])([CH3:4])([CH3:3])[CH3:2]

参加物

6

反応物 4

HCID 80711,2-DimethoxyethaneHCID 8471TriethylamineHCID 24614Phosphorus tribromideHCID 57867426Di-tert-butyl{3-[3-(hydroxymethyl)isoxazol-5-yl]pyridin-2-yl}imidodicarbonate

生成物 1

HCID 57867418Di-tert-butyl{3-[3-(bromomethyl)isoxazol-5-yl]pyridin-2-yl}imidodicarbonate収率 15.4%

試薬・触媒・溶媒 1

HCID 962Water溶媒

実験手順

To a mixture of di-tert-butyl{3-[3-(hydroxymethyl)isoxazol-5-yl]pyridin-2-yl}imidodicarbonate (0.78 g, 2 mmol), triethylamine (1.95 mL, 14 mmol) and 1,2-dimethoxyethane (10 mL) was added phosphorus tribromide (0.37 mL, 4 mmol) dropwise at 0° C., which was stirred at room temperature for two hours, and then stirred at 50° C. for 30 minutes. The reaction mixture was cooled to 0° C., then water was added thereto and extracted with ethyl acetate, and the organic layer was washed with saturated sodium chloride water. After drying over anhydrous magnesium sulfate and filtering, the solvent was evaporated under a reduced pressure, the residue was purified by silica gel column chromatography to obtain the title compound (0.14 g).

後処理

  1. stirringstirred at 50° C. for 30 minutes
  2. temperatureThe reaction mixture was cooled to 0° C.
  3. extractionextracted with ethyl acetate
  4. washthe organic layer was washed with saturated sodium chloride water
  5. dry with materialAfter drying over anhydrous magnesium sulfate
  6. filtrationfiltering
  7. customthe solvent was evaporated under a reduced pressure
  8. customthe residue was purified by silica gel column chromatography

出典と根拠

ORDレコード
ord-05df349dbb894799866e23703ddffd95
出典データセット
uspto-grants-2012_05
特許番号
US08188119B2

反応ノート

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