Potassium Fluoride → Methyl 4-amino-3-chloro-6-(4-chloro-2-fluoro-3-methoxyphenyl)-5-fluoropicolinate

HRID 2176821ノート

反応式

HRID 2176821 の反応式
[NH2:1][C:2]1[C:7]([F:8])=[C:6](Br)[N:5]=[C:4]([C:10]([O:12][CH3:13])=[O:11])[C:3]=1[Cl:14].[Cl:15][C:16]1[CH:21]=[CH:20][C:19](B2OCCCO2)=[C:18]([F:28])[C:17]=1[O:29][CH3:30].[F-].[K+]>C(#N)C.O>[NH2:1][C:2]1[C:7]([F:8])=[C:6]([C:19]2[CH:20]=[CH:21][C:16]([Cl:15])=[C:17]([O:29][CH3:30])[C:18]=2[F:28])[N:5]=[C:4]([C:10]([O:12][CH3:13])=[O:11])[C:3]=1[Cl:14]

参加物

6

反応物 3

HCID 522689Potassium FluorideHCID 577824192-(4-Chloro-2-fluoro-3-methoxyphenyl)-1,3,2-dioxaborinaneHCID 71551894Methyl 4-amino-6-bromo-3-chloro-5-fluoropicolinate

生成物 1

HCID 57412076Methyl 4-amino-3-chloro-6-(4-chloro-2-fluoro-3-methoxyphenyl)-5-fluoropicolinate収率 72%

試薬・触媒・溶媒 2

HCID 962Water溶媒HCID 6342Acetonitrile溶媒

反応条件

温度
50 °C

実験手順

A stream of nitrogen was passed through a colorless mixture of methyl 4-amino-6-bromo-3-chloro-5-fluoropicolinate (2.8 g, 10 mmol) and 2-(4-chloro-2-fluoro-3-methoxyphenyl)-1,3,2-dioxaborinane (3.2 g, 13 mmol) in acetonitrile (CH3CN; 40 mL) and KF (1.7 g, 30 mmol) in H2O (20 mL) while heating to 50° C. (20-30 min). Dichloro-bis(triphenylphosphine)palladium(II) (PdCl2(PPh3)2; 140 mg, 0.2 mmol) was added, and the mixture was heated to 65° C. The reaction was monitored by HPLC and was complete after 5 h. The reaction mixture was filtered hot through a short pad of Celite then was diluted with H2O (20 mL) and allowed to cool. The product was collected by filtration. The light tan solid was dried under vacuum to give methyl 4-amino-3-chloro-6-(4-chloro-2-fluoro-3-methoxyphenyl)-5-fluoropicolinate (2.6 g, 72%): mp 169-170.5° C.; 1H NMR (400 MHz, DMSO-d6) δ 7.48 (d, J=8.4 Hz, 1H), 7.32 (t, J=7.7 Hz, 1H), 7.15 (s, 2H), 3.96 (s, 3H), 3.90 (s, 3H); 13C{1H} NMR (101 MHz, DMSO-d6) δ 164.85 (s), 153.11 (d, J=252.5 Hz), 146.29 (s), 144.52 (d, J=4.3 Hz), 143.74 (s), 142.75 (dd, J=227.1, 14.0 Hz), 136.38 (d, J=13.4 Hz), 128.58 (d, J=3.2 Hz), 125.87 (s), 125.54 (d, J=3.5 Hz), 122.89 (dd, J=13.8, 4.0 Hz), 113.01 (d, J=3.0 Hz), 61.61 (d, J=4.2 Hz), 52.70 (s); ESIMS m/z 364 ([M+H]+). Anal. Calcd for C14H10Cl2F2N2O3: C, 46.30; H, 2.78; N, 7.71. Found: C, 46.60; H, 2.68; N, 7.51.

後処理

  1. temperaturethe mixture was heated to 65° C
  2. filtrationThe reaction mixture was filtered hot through a short pad of Celite
  3. additionthen was diluted with H2O (20 mL)
  4. temperatureto cool
  5. filtrationThe product was collected by filtration
  6. customThe light tan solid was dried under vacuum

出典と根拠

ORDレコード
ord-2c114cde3e1a49f685c9888abfe1b00f
出典データセット
uspto-grants-2015_06
特許番号
US09067890B2

反応ノート

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