Diethyl Ether → 1-(2,2,3,4,6,7-Hexamethyl-3-hydroxy-2,3-dihydro-1-benzofuran-5-yl)-4-(4-methoxyphenyl)piperazine

HRID 1272282ノート

反応式

HRID 1272282 の反応式
C[Li].[CH2:3](OCC)C.[CH3:8][O:9][C:10]1[CH:15]=[CH:14][C:13]([N:16]2[CH2:21][CH2:20][N:19]([C:22]3[C:23]([CH3:36])=[C:24]([CH3:35])[C:25]4[O:29][C:28]([CH3:31])([CH3:30])[C:27](=[O:32])[C:26]=4[C:33]=3[CH3:34])[CH2:18][CH2:17]2)=[CH:12][CH:11]=1>C1COCC1.O>[CH3:30][C:28]1([CH3:31])[C:27]([CH3:3])([OH:32])[C:26]2[C:33]([CH3:34])=[C:22]([N:19]3[CH2:18][CH2:17][N:16]([C:13]4[CH:12]=[CH:11][C:10]([O:9][CH3:8])=[CH:15][CH:14]=4)[CH2:21][CH2:20]3)[C:23]([CH3:36])=[C:24]([CH3:35])[C:25]=2[O:29]1

参加物

6

反応物 3

HCID 3283Diethyl EtherHCID 229355955-[4-(4-methoxyphenyl)piperazin-1-yl]-2,2,4,6,7-pentamethyl-1-benzofuran-3(2H)-oneHCID 178418348HCID 178418348、化合物

生成物 1

HCID 229356081-(2,2,3,4,6,7-Hexamethyl-3-hydroxy-2,3-dihydro-1-benzofuran-5-yl)-4-(4-methoxyphenyl)piperazine収率 96.3%

試薬・触媒・溶媒 2

HCID 962Water溶媒HCID 8028Tetrahydrofuran溶媒

実験手順

A solution of methyllithium in diethyl ether (1.14 M, 5.60 mL, 6.38 mmol) was added dropwise to a solution of 4-(4-methoxyphenyl)-1-(2,2,4,6,7-pentamethyl-2,3-dihydro-1-benzofuran-3-on-5-yl)piperazine (2.00 g, 5.06 mmol) obtained in Reference Example 13 in THF (20 ml) under ice cooling and the mixture was stirred for 10 minutes. The reaction mixture was diluted with water and extracted with ethyl acetate. The organic extract was washed with water and saturated aqueous sodium chloride, and dried over anhydrous sodium sulfate. The solvent was removed under reduced pressure, and the residue was crystallized from hexane to obtain 2.00 g (yield 96%) of the title compound. mp. 139–141° C.

後処理

  1. extractionextracted with ethyl acetate
  2. extractionThe organic extract
  3. washwas washed with water and saturated aqueous sodium chloride
  4. dry with materialdried over anhydrous sodium sulfate
  5. customThe solvent was removed under reduced pressure
  6. customthe residue was crystallized from hexane

出典と根拠

ORDレコード
ord-ef7193bc13b943a5a2c4daaa32965aa8
出典データセット
uspto-grants-2007_04
特許番号
US07208495B2

反応ノート

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