Potassium Carbonate → Dibenzyl ether

HRID 1675909

反応式

HRID 1675909 の反応式
[CH3:1][C@@:2]12C(=O)CC[C@H:15]1[C@H:14]1[C@@H:5](C3C(CC1)=CC(O)=C(OC)C=3)[CH2:4][CH2:3]2.[C:23]([O-:26])([O-])=O.[K+].[K+]>CN(C=O)C.CCOC(C)=O>[CH2:1]([O:26][CH2:23][C:2]1[CH:15]=[CH:14][CH:5]=[CH:4][CH:3]=1)[C:2]1[CH:3]=[CH:4][CH:5]=[CH:14][CH:15]=1

参加物

5

反応物 2

HCID 11430Potassium CarbonateHCID 4406242-Methoxyestrone

生成物 1

HCID 7657Dibenzyl ether収率 379.6%

試薬・触媒・溶媒 2

HCID 6228Dimethylformamide溶媒HCID 8857Ethyl Acetate溶媒

実験手順

The 2-Methoxy estrone (0.521 g, 0.00173 mol) was dissolved in anhydrous DMF under nitrogen atmosphere, added K2CO3 (0.718 g, 0.00225 mol) and stirred at r.t. for approximately 40 h. The crude mixture was diluted with EtOAc, washed with water and brine. The organics were dried (MgSO4) and concentrated. The crude product was pre-absorbed onto silica gel, purified using Flash Master-2 system to give the benzylated compound 32 (0.651 g, 96%) as a chalky white solid: TLC (Rt, 0.4, EtOAc:Hexane, 3:7); 1H NMR (270 MHz, CDCl3) δ 0.90 (s, 3H, 18-CH3 diastereomeric methyl signals), 1.24-1.27 (t, J=3.4 Hz, 3H, CH2—CH3), 1.24-1.29 (t, J=7.1 Hz, 3H, CH2—CH3), 1.39-2.44 (broad m, 12H), 2.44-2.54 (dd, J=18.8 and 8.6 Hz, 1H), 2.77-2.83 (m, 2H), 3.84-3.87 (s, 3H, OMe), 5.0 (s, 2H, PhCH2), 6.6 (s, 1H, aromatic), 6.77 (s, 1H, aromatic), 3.87-3.84 (s, 3H, OMe), 4.10-4.16 (q, J=7.0 Hz, 2H, CH3—CH2—O), 5.09 (s, 2H, CH2-phenyl), 6.61 (s, 1H, 4-CH), 6.82 (s, 1H, aromatic 1-CH), 7.41-7.43 (m, 5H).

後処理

  1. washwashed with water and brine
  2. dry with materialThe organics were dried (MgSO4)
  3. concentrationconcentrated
  4. customThe crude product was pre-absorbed onto silica gel
  5. custompurified

出典と根拠

ORDレコード
ord-d034b72548964ff4a8717d1660d6065d
出典データセット
uspto-grants-2011_08
特許番号
US08003783B2

関連ノート

読み込み中…