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Cesium carbonate → Methyl 6-chloro-4-(5-(methylsulfonyl)pyridin-2-ylamino)pyridazine-3-carboxylate

HRID 1396340
ノート
印刷プレビュー

反応式

HRID 1396340 の反応式
Cl[C:2]1[CH:7]=[C:6]([Cl:8])[N:5]=[N:4][C:3]=1[C:9]([O:11][CH3:12])=[O:10].[CH3:13][S:14]([C:17]1[CH:18]=[CH:19][C:20]([NH2:23])=[N:21][CH:22]=1)(=[O:16])=[O:15].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.C(=O)([O-])[O-].[Cs+].[Cs+]>C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.C1C=CC(/C=C/C(/C=C/C2C=CC=CC=2)=O)=CC=1.[Pd].[Pd].O1CCOCC1>[Cl:8][C:6]1[N:5]=[N:4][C:3]([C:9]([O:11][CH3:12])=[O:10])=[C:2]([NH:23][C:20]2[CH:19]=[CH:18][C:17]([S:14]([CH3:13])(=[O:16])=[O:15])=[CH:22][N:21]=2)[CH:7]=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

7

反応物 4

HCID 10796Cesium carbonateHCID 6360441,1'-(9,9-Dimethyl-9H-xanthene-4,5-diyl)bis(1,1-diphenylphosphine)HCID 17848322Methyl 4,6-dichloropyridazine-3-carboxylateHCID 178610085-Methanesulfonylpyridin-2-amine

生成物 1

HCID 86689711Methyl 6-chloro-4-(5-(methylsulfonyl)pyridin-2-ylamino)pyridazine-3-carboxylate収率 19%

試薬・触媒・溶媒

2
HCID 9811564Bis(dibenzylideneacetone)palladium触媒HCID 312751,4-Dioxane溶媒

反応条件

温度
100 °C

実験手順

A flask was charged with methyl 4,6-dichloropyridazine-3-carboxylate (200 mg, 0.966 mmol), 5-(methylsulfonyl)pyridin-2-amine (183 mg, 1.06 mmol), Pd2(dba)3 (88.5 mg, 0.097 mmol), xantphos (112 mg, 0.193 mmol) and cesium carbonate (944 mg, 2.9 mmol). 1,4-Dioxane (6.0 mL) was added and argon was bubbled through it while sonicating the flask for 5 min. The flask was sealed and heated at 100° C. for 1 h. After cooling the mixture was filtered through celite and the filter cake washed with CH2Cl2. The filtrates were concentrated in vacuo then purified by chromatography (spherical silica 20-45 μM, 23 g, Versaflash Supelco, 0 to 100% ethyl acetate in hexanes, 30 min) to give methyl 6-chloro-4-(5-(methylsulfonyl)pyridin-2-ylamino)pyridazine-3-carboxylate (62 mg, 19%) as a light yellow solid. 1H NMR (400 MHz, CHLOROFORM-d) δ ppm 11.18 (s, 1H) 9.31 (s, 1H) 8.98 (d, J=2.27 Hz, 1H) 8.19 (dd, J=8.59, 2.53 Hz, 1H) 7.09 (dd, J=8.84, 0.76 Hz, 1H) 4.15 (s, 3H) 3.15 (s, 3H). LCMS (EI/CI) m/z: 342.9 [M+H].

後処理

  1. customargon was bubbled through it
  2. customwhile sonicating the flask for 5 min
  3. customThe flask was sealed
  4. temperatureAfter cooling the mixture
  5. filtrationwas filtered through celite
  6. washthe filter cake washed with CH2Cl2
  7. concentrationThe filtrates were concentrated in vacuo
  8. customthen purified by chromatography (spherical silica 20-45 μM, 23 g, Versaflash Supelco, 0 to 100% ethyl acetate in hexanes, 30 min)

出典と根拠

ORDレコード
ord-abc9b81491254b3a9799a53293644aa5
出典データセット
uspto-grants-2014_12
DOI
10.6084/m9.figshare.5104873.v1
特許番号
US08901124B2

反応ノート

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