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

HRID 82395ノート

反応式

HRID 82395 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 orange 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-a9ab158095a24dbebb5d3ae8f558f169
出典データセット
uspto-grants-2014_09
特許番号
US08846681B2

反応ノート

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