Nitrogen → {4-[2-(3,4,5-Trimethoxy-phenyl)-acetyl]-piperazin-1-yl}-acetic acid ethyl ester

HRID 1944258

反応式

HRID 1944258 の反応式
N#N.CCN=C=NCCCN(C)C.Cl.CCN(CC)CC.[CH3:22][O:23][C:24]1[CH:25]=[C:26]([CH2:34][C:35]([OH:37])=O)[CH:27]=[C:28]([O:32][CH3:33])[C:29]=1[O:30][CH3:31].[CH2:38]([O:40][C:41]([CH2:43][N:44]1[CH2:49][CH2:48][NH:47][CH2:46][CH2:45]1)=[O:42])[CH3:39]>C(Cl)Cl.CN(C1C=CN=CC=1)C>[CH2:38]([O:40][C:41](=[O:42])[CH2:43][N:44]1[CH2:49][CH2:48][N:47]([C:35](=[O:37])[CH2:34][C:26]2[CH:27]=[C:28]([O:32][CH3:33])[C:29]([O:30][CH3:31])=[C:24]([O:23][CH3:22])[CH:25]=2)[CH2:46][CH2:45]1)[CH3:39]

参加物

8

反応物 5

HCID 947NitrogenHCID 8471TriethylamineHCID 703723,4,5-Trimethoxyphenylacetic acidHCID 207112Ethyl piperazine-1-acetateHCID 27239391,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochloride

生成物 1

HCID 59785709{4-[2-(3,4,5-Trimethoxy-phenyl)-acetyl]-piperazin-1-yl}-acetic acid ethyl ester収率 40%

試薬・触媒・溶媒 2

HCID 142844-(Dimethylamino)pyridine触媒HCID 6344Dichloromethane溶媒

実験手順

(The following reaction is done in an anhydrous N2 atmosphere.) Suspend EDC HCl (188 mg, 0.98 mmol) and Et3N (137 μL, 0.98 mmol) in anhydrous DCM (1.0 mL) and stir the resulting solution for 5 min at rt. Add 2-(3,4,5-Trimethoxy-phenyl)-acetic acid (163 mg, 0.72 mmol) and DMAP (8 mg, 0.07 mmol) and stir the resulting solution for 10 min. Add 1-(Ethoxycarbonylmethyl)piperazine (43) (112 mg, 0.65 mmol) and stir the reaction solution overnight at rt. Quench reaction solution with sat. aqu. NH4Cl and water, separate layers and extract aqu. layer with DCM (3 times). Wash the combined organic layer with water and brine and dry with Na2SO4. Purify the crude product by preparative radial chromatography (silica gel, EtOAc/MeOH 10+1) to obtain {4-[2-(3,4,5-Trimethoxy-phenyl)-acetyl]-piperazin-1-yl}-acetic acid ethyl ester (44) (99 mg, 40%) as a colorless oil. 1H NMR (400 MHz, CDCl3): 1.25 (t, 3H, J=7.1 Hz); 2.48 (br.m, 2H); 2.58 (br.m, 2H); 3.21 (br.s, 2H); 3.53 (br.m, 2H); 3.65 (s, 2H); 3.71 (br.m, 2H); 3.81 (s, 3H); 3.82 (s, 6H); 4.16 (q, 2H, J=7.1 Hz); 6.42 (s, 2H).

後処理

  1. custom(The following reaction
  2. customQuench
  3. customreaction solution with sat. aqu
  4. customNH4Cl and water, separate layers
  5. extractionextract aqu
  6. washWash the combined organic layer with water and brine
  7. dry with materialdry with Na2SO4
  8. customPurify the crude product by preparative radial chromatography (silica gel, EtOAc/MeOH 10+1)

出典と根拠

ORDレコード
ord-94f14d83acd84f01b6d09c49460a1872
出典データセット
uspto-grants-2013_03
特許番号
US08394835B2

関連ノート

読み込み中…