Ethyl 3-amino-2-phenylpropyl(diethoxymethyl)phosphinate → 3-Amino-2-phenylpropylphosphonous acid

HRID 622897

反応式

HRID 622897 の反応式
[NH2:1][CH2:2][CH:3]([C:17]1[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=1)[CH2:4][P:5](C(OCC)OCC)(=[O:9])[O:6]CC>Cl>[NH2:1][CH2:2][CH:3]([C:17]1[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=1)[CH2:4][P:5]([OH:9])[OH:6]

参加物

3

反応物 1

HCID 14362832Ethyl 3-amino-2-phenylpropyl(diethoxymethyl)phosphinate

生成物 1

HCID 100356503-Amino-2-phenylpropylphosphonous acid

試薬・触媒・溶媒 1

HCID 313Hydrochloric Acid溶媒

実験手順

A solution of 4.0 g of ethyl 3-amino-2-phenylpropyl(diethoxymethyl)phosphinate in 40 ml of 36% aqueous hydrochloric acid is heated to reflux for a period of 2 h. The reaction mixture is then allowed to cool to room temperature, concentrated under reduced pressure and co-evaporated twice with 20 ml of water under reduced pressure. The crude product is dissolved in 20 ml of water, washed twice with 20 ml of diethyl ether and the aqueous layer is then separated and evaporated under reduced pressure. The crude product is dissolved in 50 ml ethanol and 5 ml of propylene oxide is added dropwise. The precipitated solid is collected by filtration and dried to give 3-amino-2-phenylpropylphosphonous acid m.p. 228°-235° C., 31P=+24.3 ppm (D2O).

後処理

  1. temperatureto reflux for a period of 2 h
  2. concentrationconcentrated under reduced pressure
  3. dissolutionThe crude product is dissolved in 20 ml of water
  4. washwashed twice with 20 ml of diethyl ether
  5. customthe aqueous layer is then separated
  6. customevaporated under reduced pressure
  7. dissolutionThe crude product is dissolved in 50 ml ethanol
  8. addition5 ml of propylene oxide is added dropwise
  9. filtrationThe precipitated solid is collected by filtration
  10. customdried

出典と根拠

ORDレコード
ord-a1936b106e85466e88263919d9623b2e
出典データセット
uspto-grants-1988_09
特許番号
US04772738

関連ノート

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