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Dichloromethane → tert-butyl 4-(3-amino-6-(3,6-dihydro-2H-pyran-4-yl)pyrazin-2-yl)-2-fluorobenzoate

HRID 595960
ノート
印刷プレビュー

反応式

HRID 595960 の反応式
[NH2:1][C:2]1[C:3]([C:9]2[CH:21]=[CH:20][C:12]([C:13]([O:15][C:16]([CH3:19])([CH3:18])[CH3:17])=[O:14])=[C:11]([F:22])[CH:10]=2)=[N:4][C:5](Br)=[CH:6][N:7]=1.C(Cl)Cl.[C:26]1(B2OC(C)(C)C(C)(C)O2)[CH2:31][CH2:30][CH2:29][CH2:28]C=1.C(OCC)(=[O:43])C>COCCOC.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.Cl[Pd]Cl.[Fe+2]>[NH2:1][C:2]1[C:3]([C:9]2[CH:21]=[CH:20][C:12]([C:13]([O:15][C:16]([CH3:19])([CH3:18])[CH3:17])=[O:14])=[C:11]([F:22])[CH:10]=2)=[N:4][C:5]([C:30]2[CH2:31][CH2:26][O:43][CH2:28][CH:29]=2)=[CH:6][N: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 6344DichloromethaneHCID 8857Ethyl AcetateHCID 109326752-(Cyclohex-1-en-1-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolaneHCID 118045500tert-Butyl 4-(3-amino-6-bromopyrazin-2-yl)-2-fluorobenzoate

生成物 1

HCID 118045381tert-butyl 4-(3-amino-6-(3,6-dihydro-2H-pyran-4-yl)pyrazin-2-yl)-2-fluorobenzoate収率 85%

試薬・触媒・溶媒 2

HCID 44119782Bis(cyclopenta-1,4-dien-1-yl(diphenyl)phosphane);dichloropalladium;iron(2+)触媒
HCID 80711,2-Dimethoxyethane溶媒

反応条件

温度
110 °C

実験手順

To a solution of tert-butyl 4-(3-amino-6-bromopyrazin-2-yl)-2-fluorobenzoate (21 g, 57.0 mmol) in DME (127 mL) was added PdCl2(dppf).CH2Cl2 adduct (2.329 g, 2.85 mmol), 2-(cyclohex-1-en-1-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (13.18 g, 62.7 mmol), and 2 M Na2CO3aqueous solution (63.4 mL). The reaction was heated at 110° C. for 16 h. To the reaction mixture was added 200 mL of ethyl acetate, washed with water (2×100 mL), brine, dried over sodium sulfate, filtered and concentrated. The residue was purified by flash chromatography eluting with 0-100% of EtOAc/DCM to provide tert-butyl 4-(3-amino-6-(3,6-dihydro-2H-pyran-4-yl)pyrazin-2-yl)-2-fluorobenzoate (18 g, 48.5 mmol, 85%). LCMS (m/z): 372.3 (MH+), 0.95 min.

後処理

  1. washwashed with water (2×100 mL), brine
  2. dry with materialdried over sodium sulfate
  3. filtrationfiltered
  4. concentrationconcentrated
  5. customThe residue was purified by flash chromatography
  6. washeluting with 0-100% of EtOAc/DCM

出典と根拠

ORDレコード
ord-73336f647bac4e2b8ed8284c66731fb4
出典データセット
uspto-grants-2016_01
DOI
10.6084/m9.figshare.5104873.v1
特許番号
US09242996B2

反応ノート

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このページの内容参加物反応条件実験手順後処理出典と根拠反応ノート