Acetic Acid → (2S,5R)-1-benzyl-2,5-dimethyl-4-(3,3,3-trifluoropropyl)piperazine

HRID 1927009

反応式

HRID 1927009 の反応式
[CH2:1]([N:8]1[CH2:13][C@@H:12]([CH3:14])[NH:11][CH2:10][C@@H:9]1[CH3:15])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[F:16][C:17]([F:22])([F:21])[CH2:18][CH:19]=O.CC(O)=O.C([BH3-])#N.[Na+]>C1COCC1.CO>[CH2:1]([N:8]1[CH2:13][C@@H:12]([CH3:14])[N:11]([CH2:19][CH2:18][C:17]([F:22])([F:21])[F:16])[CH2:10][C@@H:9]1[CH3:15])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

参加物

7

反応物 4

HCID 176Acetic AcidHCID 680283,3,3-TrifluoropropanalHCID 5003444Sodium cyanoborohydrideHCID 23402345(2S,5R)-1-Benzyl-2,5-dimethylpiperazine

生成物 1

HCID 57519197(2S,5R)-1-benzyl-2,5-dimethyl-4-(3,3,3-trifluoropropyl)piperazine収率 92.4%

試薬・触媒・溶媒 2

HCID 887Methanol溶媒HCID 8028Tetrahydrofuran溶媒

実験手順

To a solution of (2S,5R)-1-benzyl-2,5-dimethylpiperazine (2.00 g, 7.21 mmol) in THF (10 mL), MeOH (10 mL), and TEA (1.0 mL) was added 3,3,3-trifluoropropionaldehyde (1.62 g, 14.4 mmol) and AcOH (0.826 mL, 14.4 mmol) followed by sodium cyanoborohydride (0.907 g, 14.4 mmol). The reaction was allowed to stir for 2 h, at which time the reaction was quenched with water (15 mL) then made basic with NaHCO3 and extracted with EtOAc. The organic layer was washed with brine, dried and concentrated in vacuo to yield a white powder (2.0 g, 90%). Mass Spectrum: Calcd for C16H24N2F3 (M+H): 301. Found: 301.

後処理

  1. customwas quenched with water (15 mL)
  2. extractionextracted with EtOAc
  3. washThe organic layer was washed with brine
  4. customdried
  5. concentrationconcentrated in vacuo

出典と根拠

ORDレコード
ord-09b71a23782244e28b75fcc653bd1c90
出典データセット
uspto-grants-2012_05
特許番号
US08183255B2

関連ノート

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