Hydrochloric Acid → Tert-butyl 4-[3-(propylamino)pyridin-2-yl]piperazine-1-carboxylate

HRID 1449705ノート

反応式

HRID 1449705 の反応式
C([BH3-])#N.[Na+].[CH3:5][C:6]([CH3:24])([O:8][C:9]([N:11]1[CH2:16][CH2:15][N:14]([C:17]2[C:22]([NH2:23])=[CH:21][CH:20]=[CH:19][N:18]=2)[CH2:13][CH2:12]1)=[O:10])[CH3:7].[CH3:25][CH2:26][CH:27]=O.Cl.[OH-].[NH4+]>ClCCl.CO>[CH3:7][C:6]([CH3:24])([O:8][C:9]([N:11]1[CH2:12][CH2:13][N:14]([C:17]2[C:22]([NH:23][CH2:25][CH2:26][CH3:27])=[CH:21][CH:20]=[CH:19][N:18]=2)[CH2:15][CH2:16]1)=[O:10])[CH3:5]

参加物

8

反応物 5

HCID 313Hydrochloric AcidHCID 527PropanalHCID 14923Ammonium HydroxideHCID 2756375tert-Butyl 4-(3-aminopyridin-2-yl)piperazine-1-carboxylateHCID 5003444Sodium cyanoborohydride

生成物 1

HCID 21477648Tert-butyl 4-[3-(propylamino)pyridin-2-yl]piperazine-1-carboxylate

試薬・触媒・溶媒 2

HCID 887Methanol溶媒HCID 6344Dichloromethane溶媒

実験手順

Sodium cyanoborohydride (0.31 g) is added to a cold solution of 1-[1,1dimethylethoxycarbonyl]-4-[3-amino-2-pyridinyl]piperazine (International Publication No. WO 88/08424, 2.8 g), propional (0.87 g), and methanol (15 ml). After the exotherm has subsided, the reaction is stirred at 20°-25° overnight. The reaction is acidified (pH 2) with aqueous hydrochloride and then diluted with dichloromethane. The pH is adjusted with aqueous ammonium hydroxide (pH 8), and the phases are separated. The organic phase is dried over sodium sulfate, and concentrated under reduced pressure to a crude product which is dissolved in diethyl ether and allowed to crystallize at -5°. The solid is identified as starting material. The mother liquor is concentrated in vacuo to give the title compound.

後処理

  1. customthe phases are separated
  2. dry with materialThe organic phase is dried over sodium sulfate
  3. concentrationconcentrated under reduced pressure to a crude product which
  4. dissolutionis dissolved in diethyl ether
  5. customto crystallize at -5°
  6. concentrationThe mother liquor is concentrated in vacuo

出典と根拠

ORDレコード
ord-d2688b79dc114d39b78fb6c840a195ea
出典データセット
uspto-grants-1997_02
特許番号
US05599930

反応ノート

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