Hydrochloric Acid → N-stearyl pyridone

HRID 1369129ノート

反応式

HRID 1369129 の反応式
[CH2:1]([NH2:19])[CH2:2][CH2:3][CH2:4][CH2:5][CH2:6][CH2:7][CH2:8][CH2:9][CH2:10][CH2:11][CH2:12][CH2:13][CH2:14][CH2:15][CH2:16][CH2:17][CH3:18].[C:20]([CH2:22][C:23]([O:25]CC)=O)#N.[C:28](OCC)(=O)[CH2:29]C(C)=O.N1CCCCC1.Cl>O.CO.COCCOC.C1(C)C=CC=CC=1>[CH2:1]([N:19]1[CH:29]=[CH:28][CH:20]=[CH:22][C:23]1=[O:25])[CH2:2][CH2:3][CH2:4][CH2:5][CH2:6][CH2:7][CH2:8][CH2:9][CH2:10][CH2:11][CH2:12][CH2:13][CH2:14][CH2:15][CH2:16][CH2:17][CH3:18]

参加物

10

反応物 5

HCID 313Hydrochloric AcidHCID 7764Ethyl cyanoacetateHCID 8082PiperidineHCID 8868Ethyl AcetoacetateHCID 15793Octadecylamine

生成物 1

HCID 21388044N-stearyl pyridone収率 87.1%

試薬・触媒・溶媒 4

HCID 887Methanol溶媒HCID 962Water溶媒HCID 1140Toluene溶媒HCID 80711,2-Dimethoxyethane溶媒

反応条件

温度
120 °C

実験手順

Into a 2 liter Erlenmeyer flask equipped with magnetic stir bar and temperature thermostat was charged octadecylamine (stearylamine, 18.9 grams, 0.07 mol; obtained from Sigma-Aldrich Co., Milwaukee, Wis.) followed with ethyl cyanoacetate (7.9 grams, 0.07 mol, density 1.06 grams per milliliter; obtained from Spectrum Chemicals, New Brunswick, N.J.). The resulting colorless mixture was stirred and heated to 120° C. internal temperature for 1 hour, during which time a byproduct was distilled away. To the hot reaction mixture was then sequentially added ethyl acetoacetate (10.08 grams, 0.0775 mol, density 1.02 grams per milliliter, obtained from Lonza Group, Germany), piperidine (11.0 grams, 0.13 mol, density 0.861 grams per milliliter; obtained from Sigma-Aldrich Co.), and a solvent mixture (60 milliliters) containing 5 parts by weight toluene and 1 part by weight 1,2-dimethoxyethane. The reaction proceeded with stirring at 120° C. for another 24 hours. The solvents were then distilled off in vacuo, and the remaining viscous brown solution was carefully poured into a stirring solution of methanol (80 milliliters), deionized water (20 milliliters), and concentrated hydrochloric acid (16 milliliters, 2.5 mol). A solid tan precipitate formed instantly and the slurry was vacuum filtered followed by rinsing the solid cake with 2×50 milliliter portions of 80 percent aqueous methanol. The cake thus obtained was air-dried for 24 hours to afford 24.5 grams (0.061 mol, 87 percent yield) of N-stearyl pyridone product as light tan powder.

後処理

  1. customInto a 2 liter Erlenmeyer flask equipped with magnetic stir bar
  2. distillationduring which time a byproduct was distilled away
  3. stirringwith stirring at 120° C. for another 24 hours
  4. distillationThe solvents were then distilled off in vacuo
  5. customA solid tan precipitate formed instantly
  6. filtrationfiltered
  7. washby rinsing the solid cake with 2×50 milliliter portions of 80 percent aqueous methanol
  8. customThe cake thus obtained
  9. customwas air-dried for 24 hours

出典と根拠

ORDレコード
ord-4865b638a9e04faeb68bfb49e31c1ebd
出典データセット
uspto-grants-2003_06
特許番号
US06576747B1

反応ノート

読み込み中…