Ammonium Acetate → Ethyl (5R)-2-amino-5-methyl-1-cyclopentene-1-carboxylate

HRID 80995ノート

反応式

HRID 80995 の反応式
C([O-])(=O)C.[NH4+:5].[CH3:6][CH:7]1[CH2:11][CH2:10][C:9](=O)[C@@H:8]1[C:13]([O:15][CH2:16][CH3:17])=[O:14]>CO>[NH2:5][C:9]1[CH2:10][CH2:11][C@@H:7]([CH3:6])[C:8]=1[C:13]([O:15][CH2:16][CH3:17])=[O:14]

参加物

4

反応物 2

HCID 517165Ammonium AcetateHCID 86618740(R)-ethyl 2-methyl-5-oxocyclopentanecarboxylate

生成物 1

HCID 59671147Ethyl (5R)-2-amino-5-methyl-1-cyclopentene-1-carboxylate収率 97%

試薬・触媒・溶媒 1

HCID 887Methanol溶媒

実験手順

Ammonium acetate (240.03 g, 3113.9 mmol) was added to a solution of (R)-ethyl 2-methyl-5-oxocyclopentanecarboxylate (106.0 g, 622.78 mmol) in MeOH (1.2 L). The reaction mixture was stirred at room temperature under nitrogen for 20 hours, after which it was complete as judged by TLC and HPLC. The reaction mixture was concentrated to remove MeOH. The resulting residue was dissolved in DCM, washed twice with H2O, once with brine, dried (Na2SO4), filtered, and concentrated to give (R)-ethyl 2-amino-5-methylcyclopent-1-enecarboxylate (102 g, 97% yield) as an oil. LC/MS (APCI+) m/z 170 [M+H]+.

後処理

  1. concentrationThe reaction mixture was concentrated
  2. customto remove MeOH
  3. dissolutionThe resulting residue was dissolved in DCM
  4. washwashed twice with H2O, once with brine
  5. dry with materialdried (Na2SO4)
  6. filtrationfiltered
  7. concentrationconcentrated

出典と根拠

ORDレコード
ord-8424087ad2964ac8b9f9c92003b78a61
出典データセット
uspto-grants-2014_09
特許番号
US08846683B2

反応ノート

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