Dimethylcarbamoyl Chloride → HCID 71512084、化合物

HRID 1914490ノート

反応式

HRID 1914490 の反応式
[CH3:1][O:2][C:3]1[CH:4]=[C:5]([CH:23]=[CH:24][C:25]=1[O:26][CH3:27])[CH2:6][C@H:7]1[CH2:11][O:10][C:9](=[O:12])[C@@H:8]1[CH2:13][C:14]1[CH:19]=[CH:18][C:17]([OH:20])=[C:16]([O:21][CH3:22])[CH:15]=1.[CH3:28][N:29]([CH3:33])[C:30](Cl)=[O:31].[NH4+].[Cl-]>C(Cl)Cl.CN(C1C=CN=CC=1)C>[CH3:28][N:29]([CH3:33])[C:30](=[O:31])[O:20][C:17]1[CH:18]=[CH:19][C:14]([CH2:13][C@@H:8]2[C@@H:7]([CH2:6][C:5]3[CH:23]=[CH:24][C:25]([O:26][CH3:27])=[C:3]([O:2][CH3:1])[CH:4]=3)[CH2:11][O:10][C:9]2=[O:12])=[CH:15][C:16]=1[O:21][CH3:22]

参加物

6

反応物 3

HCID 6598Dimethylcarbamoyl ChlorideHCID 25517Ammonium ChlorideHCID 64981(-)-Arctigenin

生成物 1

HCID 71512084HCID 71512084、化合物収率 62%

試薬・触媒・溶媒 2

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

実験手順

To a solution of (3R,4R)-4-(3,4-dimethoxybenzyl)-3-(4-hydroxy-3-methoxybenzyl)dihydrofuran-2(3H)-one (150 mg, 0.40 mmol, 1.0 eq) in DCM (15 mL) was added TEA (81 mg, 0.81 mmol, 2.0 eq) and DMAP (98 mg, 0.81 mmol, 2.0 eq), followed by N,N-dimethylcarbamoyl chloride (65 mg, 0.60 mmol, 1.5 eq). The mixture was stirred at rt for overnight, then sat. aq. NH4Cl (30 mL) was added. The reaction mixture was extracted with DCM (30 mL×3). The combined organic layers were dried over MgSO4, filtered and concentrated. The resulting residue was purified by flash column chromatography (PE/EA=1/1, v/v) to afford 4-(((3R,4R)-4-(3,4-dimethoxybenzyl)-2-oxotetrahydrofuran-3-yl)methyl)-2-methoxyphenyl dimethylcarbamate (110 mg, 61.6%). LRMS (M+H+) m/z calculated 444.2, found 443.9. 1H NMR (CDCl3, 400 MHz) δ 6.97 (d, 1H), 6.73-6.78 (m, 2H), 6.64-6.70 (m, 1H), 6.50-6.55 (m, 2H), 4.12-4.17 (m, 1H), 3.82-3.90 (m, 1H), 3.85 (s, 3H), 3.83 (s, 3H), 3.77 (s, 3H), 3.11 (s, 3H), 3.00 (s, 3H), 2.97 (d, 2H), 2.49-2.69 (m, 4H).

後処理

  1. extractionThe reaction mixture was extracted with DCM (30 mL×3)
  2. dry with materialThe combined organic layers were dried over MgSO4
  3. filtrationfiltered
  4. concentrationconcentrated
  5. customThe resulting residue was purified by flash column chromatography (PE/EA=1/1

出典と根拠

ORDレコード
ord-cd9b6adb8b85419d8e4a66fcf8d191e6
出典データセット
uspto-grants-2013_12
特許番号
US08614211B2

反応ノート

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