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Cesium carbonate → 5-Bromo-3-(5-ethyl-4,5,6,7-tetrahydropyrazolo[1,5-a]pyrazin-2-ylamino)-1-methylpyridin-2(1H)-one

HRID 1919088
ノート
印刷プレビュー

反応式

HRID 1919088 の反応式
[CH2:1]([N:3]1[CH2:8][CH2:7][N:6]2[N:9]=[C:10]([NH2:12])[CH:11]=[C:5]2[CH2:4]1)[CH3:2].Br[C:14]1[C:15](=[O:22])[N:16]([CH3:21])[CH:17]=[C:18]([Br:20])[CH:19]=1.C(=O)([O-])[O-].[Cs+].[Cs+].CC1(C)C2C(=C(P(C3C=CC=CC=3)C3C=CC=CC=3)C=CC=2)OC2C(P(C3C=CC=CC=3)C3C=CC=CC=3)=CC=CC1=2>O1CCOCC1.[Pd].[Pd].C(=CC(C=CC1C=CC=CC=1)=O)C1C=CC=CC=1.C(=CC(C=CC1C=CC=CC=1)=O)C1C=CC=CC=1.C(=CC(C=CC1C=CC=CC=1)=O)C1C=CC=CC=1.CO.C(OCC)C.C(OCC)(=O)C.O>[Br:20][C:18]1[CH:19]=[C:14]([NH:12][C:10]2[CH:11]=[C:5]3[CH2:4][N:3]([CH2:1][CH3:2])[CH2:8][CH2:7][N:6]3[N:9]=2)[C:15](=[O:22])[N:16]([CH3:21])[CH:17]=1
参加物反応条件実験手順後処理出典と根拠反応ノート

参加物

11

反応物 4

HCID 10796Cesium carbonateHCID 6360441,1'-(9,9-Dimethyl-9H-xanthene-4,5-diyl)bis(1,1-diphenylphosphine)HCID 36143503,5-Dibromo-1-methylpyridin-2(1H)-oneHCID 580439485-Ethyl-4,5,6,7-tetrahydropyrazolo[1,5-a]pyrazin-2-amine

生成物 1

HCID 580439185-Bromo-3-(5-ethyl-4,5,6,7-tetrahydropyrazolo[1,5-a]pyrazin-2-ylamino)-1-methylpyridin-2(1H)-one収率 28%

試薬・触媒・溶媒 6

HCID 9832798Tris(dibenzylideneacetone) dipalladium触媒HCID 887Methanol溶媒HCID 962Water溶媒HCID 3283Diethyl Ether溶媒HCID 8857Ethyl Acetate溶媒HCID 312751,4-Dioxane溶媒

反応条件

温度
100 °C

実験手順

A sealed tube was equipped with a magnetic stirrer and charged with 285b (1.1 g, 6.4 mmol), 3,5-dibromo-1-methylpyridin-2(1H)-one 5 (1.7 g, 6.4 mmol) and cesium carbonate (4.6 g, 14 mmol) in 1,4-dioxane (64 mL). After bubbling nitrogen through the solution for 30 min, Xantphos (440 mg, 0.8 mmol) and tris(dibenzylideneacetone) dipalladium(0) (400 mg, 0.5 mmol) were added, and the reaction mixture was heated to 100° C. for 16 h. After this time, water (50 mL) and ethyl acetate (50 mL) were added. The aqueous layer was separated and extracted with ethyl acetate (2×50 mL). The combined organic extracts were washed with brine (100 mL) and dried over sodium sulfate. The resulting residue was purified by column chromatography eluting with a gradient of methylene chloride-60:35:5 methylene chloride:diethyl ether:methanol to afford a 28% yield (620 mg) of 285c.

後処理

  1. customA sealed tube was equipped with a magnetic stirrer
  2. customAfter bubbling nitrogen through the solution for 30 min
  3. customThe aqueous layer was separated
  4. extractionextracted with ethyl acetate (2×50 mL)
  5. washThe combined organic extracts were washed with brine (100 mL)
  6. dry with materialdried over sodium sulfate
  7. customThe resulting residue was purified by column chromatography
  8. washeluting with a gradient of methylene chloride-60:35:5 methylene chloride

出典と根拠

ORDレコード
ord-e14f199a635a4761b22bc78307a0ba89
出典データセット
uspto-grants-2013_12
DOI
10.6084/m9.figshare.5104873.v1
特許番号
US08618107B2

反応ノート

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