Bromide ion → Ethyl 4-(4-(4-Chloro-2-fluorophenoxy)phenoxy)pentanoate

HRID 580103

反応式

HRID 580103 の反応式
[Cl:1][C:2]1[CH:15]=[CH:14][C:5]([O:6][C:7]2[CH:12]=[CH:11][C:10]([OH:13])=[CH:9][CH:8]=2)=[C:4]([F:16])[CH:3]=1.Br[CH:18]([CH3:26])[CH2:19][CH2:20][C:21]([O:23][CH2:24][CH3:25])=[O:22].C(=O)([O-])[O-].[K+].[K+].[Br-].C(=O)([O-])[O-].C1(O)C=CC=CC=1.Cl>CN(C=O)C>[Cl:1][C:2]1[CH:15]=[CH:14][C:5]([O:6][C:7]2[CH:8]=[CH:9][C:10]([O:13][CH:18]([CH3:26])[CH2:19][CH2:20][C:21]([O:23][CH2:24][CH3:25])=[O:22])=[CH:11][CH:12]=2)=[C:4]([F:16])[CH:3]=1

参加物

9

反応物 7

HCID 259Bromide ionHCID 313Hydrochloric AcidHCID 996PhenolHCID 11430Potassium CarbonateHCID 19660Carbonate IonHCID 316888Ethyl 4-bromopentanoateHCID 140726804-(4-Chloro-2-fluorophenoxy)phenol

生成物 1

HCID 13880907Ethyl 4-(4-(4-Chloro-2-fluorophenoxy)phenoxy)pentanoate

試薬・触媒・溶媒 1

HCID 6228Dimethylformamide溶媒

反応条件

温度
130 °C

実験手順

A stirred mixture of 4-(4-chloro-2-fluorophenoxy)phenol (2.3 g, 0.0103 mol), ethyl 4-bromopentanoate (2.01 g, 0.0103 mol), and potassium carbonate (1.46 g, 0.105 mol) in DMF (20 ml) was heated in an oil bath at 130° C. for one hour. Additional bromide (0.5 g) and carbonate (0.5 g) were added each hour for the next four hours. At the end of this period, gas chromatography indicated that most of the starting phenol had reacted. After cooling, the reaction mixture was poured into 4N HCl solution (200 ml), and the product extracted into a 1:1 mixture of ether-pentane (2×150 ml). The organic extracts were combined, washed with 10% NaOH solution (200 ml), dried (MgSO4), then the solvent evaporated. The resulting orange oil was purified via preparative HPLC (9:1 hexane/ethyl acetate) with the second peak being collected. Removal of the solvent gave the desired ester as a light yellow oil. RI=1.5344 @ 25° C. Calc: C, 62.21; H, 5.50. Found: C, 62.38; H, 5.33.

後処理

  1. customhad reacted
  2. temperatureAfter cooling
  3. extractionthe product extracted into a 1:1 mixture of ether-pentane (2×150 ml)
  4. washwashed with 10% NaOH solution (200 ml)
  5. dry with materialdried (MgSO4)
  6. customthe solvent evaporated
  7. customThe resulting orange oil was purified via preparative HPLC (9:1 hexane/ethyl acetate) with the second peak
  8. custombeing collected
  9. customRemoval of the solvent

出典と根拠

ORDレコード
ord-4bcb87630d9b4da0b9e3c848b074bb20
出典データセット
uspto-grants-1988_06
特許番号
US04751329

関連ノート

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