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

HRID 75394ノート

反応式

HRID 75394 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 g, 3114 mmol) was added to a solution of (R)-ethyl 2-methyl-5-oxocyclopentanecarboxylate (106.0 g, 622.8 mmol) in MeOH (1.2 L). The reaction mixture was stirred at room temperature under nitrogen for 20 hours, and the reaction was complete as determined by TLC and HPLC. The reaction mixture was concentrated to remove MeOH. The resulting residue was dissolved in DCM, washed with H2O (2×), brine (1×), 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 with H2O (2×), brine (1×)
  5. dry with materialdried (Na2SO4)
  6. filtrationfiltered
  7. concentrationconcentrated

出典と根拠

ORDレコード
ord-83ad34ccddcd4c8da3f944f7c164697d
出典データセット
uspto-grants-2014_09
特許番号
US08835434B2

反応ノート

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