Ethanol → (2'-Amino-biphenyl-3-yl)-acetic acid methyl ester

HRID 2075932

反応式

HRID 2075932 の反応式
N#N.C(O)C.[NH2:6][C:7]1[CH:12]=[CH:11][CH:10]=[CH:9][C:8]=1B(O)O.[CH3:16][O:17][C:18](=[O:27])[CH2:19][C:20]1[CH:25]=[CH:24][CH:23]=[C:22](Br)[CH:21]=1>C1(C)C=CC=CC=1.[Pd].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1>[CH3:16][O:17][C:18](=[O:27])[CH2:19][C:20]1[CH:25]=[C:24]([C:8]2[CH:9]=[CH:10][CH:11]=[CH:12][C:7]=2[NH2:6])[CH:23]=[CH:22][CH:21]=1

参加物

7

反応物 4

HCID 702EthanolHCID 947NitrogenHCID 2773216(2-Aminophenyl)boronic acidHCID 11746402Methyl 2-(3-bromophenyl)acetate

生成物 1

HCID 16116037(2'-Amino-biphenyl-3-yl)-acetic acid methyl ester収率 106.8%

試薬・触媒・溶媒 2

HCID 11979704Tetrakis(triphenylphosphine)palladium触媒HCID 1140Toluene溶媒2 回

反応条件

温度
100 °C

実験手順

(The following reaction is done in an oxygenfree N2 atmosphere.) Add ethanol (0.8 mL), Tetrakis-(triphenylphosphine)-palladium(0) (30 mg, 2.2 mol %) and Na2CO3 decahydrate (944 mg, 3.30 mmol; presolved in 1.2 mL H2O) subsequently to dissolved 2-Amino-benzeneboronic acid (48) (201 mg, 1.30 mmol) in toluene (6.0 mL). Degas the reaction mixture for 5 times and flood with N2 again. Add (3-Bromo-phenyl)-acetic acid methyl ester (47) (270 mg, 1.18 mmol) in toluene (6.0 mL), degas again (5 times) and stir the reaction solution overnight at 100° C. Partition the reaction solution between EtOAc and brine (1+1) and extract the separated aqueous layer 3 times with EtOAc. Wash combined organic layer with brine and dry with Na2SO4. Remove solvent under reduced pressure and purify the crude product by preparative radial chromatography (silica gel 60 PF, CyH/EtOAc 3+1) to obtain (2′-Amino-biphenyl-3-yl)-acetic acid methyl ester (49) as an orange oil (304 mg, 81%). 1H NMR (400 MHz, CDCl3): 3.66 (s, 2H); 3.69 (s, 3H); 3.62-3.86 (br.s, 2H); 6.75 (d, 1H, J=8.1 Hz); 6.80 (t, 1H, J=7.3 Hz); 7.11 (d, 1H, J=7.3 Hz); 7.15 (d, 1H, J=8.1 Hz); 7.22-7.26 (br.m, 1H); 7.32-7.42 (m, 3H).

後処理

  1. custom(The following reaction
  2. customDegas the reaction mixture for 5 times and flood with N2 again
  3. customPartition the reaction solution between EtOAc and brine (1+1)
  4. extractionextract the separated aqueous layer 3 times with EtOAc
  5. washWash
  6. dry with materialdry with Na2SO4
  7. customRemove solvent under reduced pressure and purify the crude product by preparative radial chromatography (silica gel 60 PF, CyH/EtOAc 3+1)

出典と根拠

ORDレコード
ord-e90176a0fb4d401fb431eba9f345b83d
出典データセット
uspto-grants-2011_04
特許番号
US07923473B2

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