Hydrochloric Acid → (+/-)-1-(3-Amino-4-cyano-benzyl)-4-(6-chloro-benzo[b]thiophene-2-sulfonyl)-6-oxo-piperazine-2-carboxylic acid methyl ester

HRID 1432943ノート

反応式

HRID 1432943 の反応式
[CH3:1][O:2][C:3]([CH:5]1[CH2:10][N:9]([S:11]([C:14]2[S:18][C:17]3[CH:19]=[C:20]([Cl:23])[CH:21]=[CH:22][C:16]=3[CH:15]=2)(=[O:13])=[O:12])[CH2:8][C:7](=[O:24])[N:6]1[CH2:25][C:26]1[CH:31]=[CH:30][C:29]([C:32]#[N:33])=[C:28]([N:34]=C(C2C=CC=CC=2)C2C=CC=CC=2)[CH:27]=1)=[O:4].C1COCC1.Cl>Cl.CO>[CH3:1][O:2][C:3]([CH:5]1[CH2:10][N:9]([S:11]([C:14]2[S:18][C:17]3[CH:19]=[C:20]([Cl:23])[CH:21]=[CH:22][C:16]=3[CH:15]=2)(=[O:12])=[O:13])[CH2:8][C:7](=[O:24])[N:6]1[CH2:25][C:26]1[CH:31]=[CH:30][C:29]([C:32]#[N:33])=[C:28]([NH2:34])[CH:27]=1)=[O:4]

参加物

6

反応物 3

HCID 313Hydrochloric AcidHCID 8028TetrahydrofuranHCID 54128933(+/-)-1-[3-(Benzhydrylidene-amino)-4-cyano-benzyl]-4-(6-chloro-benzo[b]thiophene-2-sulfonyl)-6-oxo-piperazine-2-carboxylic acid methyl ester

生成物 1

HCID 54383939(+/-)-1-(3-Amino-4-cyano-benzyl)-4-(6-chloro-benzo[b]thiophene-2-sulfonyl)-6-oxo-piperazine-2-carboxylic acid methyl ester収率 101.2%

試薬・触媒・溶媒 2

HCID 313Hydrochloric Acid触媒HCID 887Methanol溶媒

実験手順

Concentrated HCl (12M, one drop) is added at 0° C. to a mixture containing (±)-1-[3-(benzhydrylidene-amino)-4-cyano-benzyl]-4-(6-chloro-benzo[b]thiophene-2-sulfonyl)-6-oxo-piperazine-2-carboxylic acid methyl ester (60 mg, 0.08 mmol) in MeOH (5 mL). Added THF (2 mL) followed by a second drop of 12M HCl and warmed reaction mixture to ambient temperature. The reaction is quenched by pouring the reaction mixture onto a 1:1 mixture of CH2Cl2/aqueous NaHCO3 and the layers are separated. The aqueous phase is washed with CH2Cl2 and then the combined organic phase is washed with brine, dried over anhydrous MgSO4, filtered and concentrated. The crude residue is chromatographed on silica gel (CH2Cl2 to 4% MeOH/CH2Cl2) to provide 42 mg (93%) of the title compound. 1H NMR (300 MHz, CDCl3) δ2.98 (dd, J=12.5, 3.5 Hz, 1H), 3.60 (d, J=16.8 Hz, 1H), 3.69 (d, J=15.3 Hz, 1H), 3.79 (s, 3H), 3.98 (m, 1H), 4.21-4.31 (m, 2H), 4.44 (br s, 2H), 5.36 (d, J=15.3 Hz, 1H), 6.47 (dd, J=8.0, 1.4 Hz, 1H), 6.54 (s, 1H), 7.26 (d, J=8.0 Hz, 1H), 7.45 (dd, J=8.5, 1.8 Hz, 1H), 7.80-7.86 (m, 3H) ppm; MS (ISP loop): m/z 519 (M+H).

後処理

  1. temperaturewarmed
  2. customreaction mixture to ambient temperature
  3. customThe reaction is quenched
  4. additionby pouring the reaction mixture
  5. additiononto a 1:1 mixture of CH2Cl2/aqueous NaHCO3
  6. customthe layers are separated
  7. washThe aqueous phase is washed with CH2Cl2
  8. washthe combined organic phase is washed with brine
  9. dry with materialdried over anhydrous MgSO4
  10. filtrationfiltered
  11. concentrationconcentrated
  12. customThe crude residue is chromatographed on silica gel (CH2Cl2 to 4% MeOH/CH2Cl2)

出典と根拠

ORDレコード
ord-11d8ead035764227862f0ba3e950ad5d
出典データセット
uspto-grants-2009_11
特許番号
US07612075B2

反応ノート

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