Methanol → 2-Methoxycarbonylaminohexanoic acid methyl ester

HRID 224952ノート

反応式

HRID 224952 の反応式
[CH3:1][O:2][C:3](=[O:10])[CH:4](Br)[CH2:5][CH2:6][CH2:7][CH3:8].[O-:11][C:12]#[N:13].[K+].[CH3:15][OH:16]>CN(C)C=O>[CH3:1][O:2][C:3](=[O:10])[CH:4]([NH:13][C:12]([O:16][CH3:15])=[O:11])[CH2:5][CH2:6][CH2:7][CH3:8]

参加物

5

反応物 3

HCID 887MethanolHCID 95578Hexanoic acid, 2-bromo-, methyl esterHCID 11378442Potassium cyanate

生成物 1

HCID 536557612-Methoxycarbonylaminohexanoic acid methyl ester収率 75.6%

試薬・触媒・溶媒 1

HCID 6228Dimethylformamide溶媒

実験手順

14.63 grams of 2-bromohexanoic acid methyl ester, 8.52 grams of potassium cyanate and 7.85 grams of methanol were heated in 70 ml of dimethylformamide (DMF) at 100° C. for 45 minutes under vigorous stirring. After the cooling off of the reaction mixture the salts were filtered off and the filtrate concentrated in a vacuum. The viscous residue was taken up with 50 ml of acetone and the undissolved material filtered off. Subsequently the acetone was distilled off and the residue fractionated in the high vacuum. There resulted 10.75 grams (75.5%) of 2-methoxycarbonylaminohexanoic acid methyl ester having a boiling point of 78° C./0.007 mbar.

後処理

  1. filtrationAfter the cooling off of the reaction mixture the salts were filtered off
  2. concentrationthe filtrate concentrated in a vacuum
  3. filtrationthe undissolved material filtered off
  4. distillationSubsequently the acetone was distilled off

出典と根拠

ORDレコード
ord-e24802aca7804039894ced150709acc9
出典データセット
uspto-grants-1980_11
特許番号
US04234744

反応ノート

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