Hydrochloric Acid → t-Butyl 4-[9-(benzoylamino)-6,10-dioxo-1,2,3,4,7,8,9,10-octahydro-6H-pyridazino-[1,2-a][1,2]diazepine-1-carboxamido]-5-oxopentanoate

HRID 2230454ノート

反応式

HRID 2230454 の反応式
[C:1]([NH:9][CH:10]1[C:16](=[O:17])[N:15]2[CH:18]([C:22]([NH:24][CH:25]([CH:39]=[O:40])[CH2:26][CH2:27][C:28](=NNC(N)=O)[O:29][C:30]([CH3:33])([CH3:32])[CH3:31])=[O:23])[CH2:19][CH2:20][CH2:21][N:14]2[C:13](=[O:41])[CH2:12][CH2:11]1)(=[O:8])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.C=[O:43].Cl>CO>[C:1]([NH:9][CH:10]1[C:16](=[O:17])[N:15]2[CH:18]([C:22]([NH:24][CH:25]([CH:39]=[O:40])[CH2:26][CH2:27][C:28]([O:29][C:30]([CH3:32])([CH3:33])[CH3:31])=[O:43])=[O:23])[CH2:19][CH2:20][CH2:21][N:14]2[C:13](=[O:41])[CH2:12][CH2:11]1)(=[O:8])[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

参加物

5

反応物 3

HCID 313Hydrochloric AcidHCID 712FormaldehydeHCID 53703560t-Butyl 4-[9-(benzoylamino)-6,10-dioxo-1,2,3,4,7,8,9,10-octahydro-6H-pyridazino-[1,2-a][1,2]diazepine-1-carboxamido]-5-oxopentanoate semicarbazone

生成物 1

HCID 54215480t-Butyl 4-[9-(benzoylamino)-6,10-dioxo-1,2,3,4,7,8,9,10-octahydro-6H-pyridazino-[1,2-a][1,2]diazepine-1-carboxamido]-5-oxopentanoate

試薬・触媒・溶媒 1

HCID 887Methanol溶媒

実験手順

A solution of semicarbazone 233e (390 mg, 0.68 mmol) in methanol (10 ml) was cooled at 0° C. and then treated with a 38% aq. solution of formaldehyde (2 ml) and 1M HCl (2 ml). The reaction mixture was then stirred overnight at room temperature. The solution was concentrated to remove the methanol. The aq. solution was extracted with EtOAc (30 ml). The organic solution was successively washed with 10% NaHCO3 (30 ml) and sat. aq. NaCl (30 ml), dried (MgSO4) and concentrated. Purification by flash chromatography or silica gel (2-5% methanol in CH2Cl2) afforded 234e (179 mg, 51% as a white foam: [α]D20 −101° (c 0.064, MeOH; IR (KBr)3346, 2976, 2934, 1730, 1657, 1535, 1456, 1425, 1278, 1255, 1156, 708; 1H NMR (CDCl3) δ9.56 (1H, s), 7.88-7.38 (5H, m), 7.01 and 6.92 (2H, 2d) 5.27-5.08 (2H, m), 4.69-4.46 (1H, m), 3.50-3.27 (2H, m), 3.15-2.73 (2H, m), 2.46-1.83 (10H, m), 1.43 (9H, s).

後処理

  1. concentrationThe solution was concentrated
  2. customto remove the methanol
  3. extractionThe aq. solution was extracted with EtOAc (30 ml)
  4. washThe organic solution was successively washed with 10% NaHCO3 (30 ml) and sat. aq. NaCl (30 ml)
  5. dry with materialdried (MgSO4)
  6. concentrationconcentrated
  7. customPurification by flash chromatography or silica gel (2-5% methanol in CH2Cl2)

出典と根拠

ORDレコード
ord-88715b85829046cd890d98cf09e37520
出典データセット
uspto-grants-2002_07
特許番号
US06423840B1

反応ノート

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