Acetic Anhydride → trans-3-(3-Cyclopentoxy-4-methoxyphenyl)-4-methoxycarbonyl-1-(methylcarbonyl)pyrrolidine

HRID 1377766ノート

反応式

HRID 1377766 の反応式
[CH:1]1([O:6][C:7]2[CH:8]=[C:9]([C@H:15]3[C@H:19]([C:20]([O:22][CH3:23])=[O:21])[CH2:18][NH:17][CH2:16]3)[CH:10]=[CH:11][C:12]=2[O:13][CH3:14])[CH2:5][CH2:4][CH2:3][CH2:2]1.[C:24](OC(=O)C)(=[O:26])[CH3:25]>C(Cl)Cl.CN(C)C1C=CN=CC=1>[CH:1]1([O:6][C:7]2[CH:8]=[C:9]([C@H:15]3[C@H:19]([C:20]([O:22][CH3:23])=[O:21])[CH2:18][N:17]([C:24]([CH3:25])=[O:26])[CH2:16]3)[CH:10]=[CH:11][C:12]=2[O:13][CH3:14])[CH2:2][CH2:3][CH2:4][CH2:5]1

参加物

5

反応物 2

HCID 7918Acetic AnhydrideHCID 70093357trans-3-(3-Cyclopentoxy-4-methoxyphenyl)-4-(methoxycarbonyl)pyrrolidine

生成物 1

HCID 67015228trans-3-(3-Cyclopentoxy-4-methoxyphenyl)-4-methoxycarbonyl-1-(methylcarbonyl)pyrrolidine収率 54%

試薬・触媒・溶媒 2

HCID 142844-(Dimethylamino)pyridine触媒HCID 6344Dichloromethane溶媒2 回

実験手順

To a solution of trans-3-(3-cyclopentoxy-4-methoxyphenyl)-4-(methoxycarbonyl)pyrrolidine (605 mg, 1.89 mmol) in 5 mL of CH2Cl2 was added 4-dimethylaminopyridine (347 mg, 2.84 mmol), followed by 1 mL of acetic anhydride After 12 hr the reaction was diluted with CH2Cl2 and washed with 1M H3PO4. The organic layer was dried over MgSO4, filtered, and concentrated under reduced pressure. Silica gel chromatography (2:1, hexanes:ethyl acetate) provided trans-3-(3-cyclopentoxy-4-methoxyphenyl)-4-methoxycarbonyl-1-(methylcarbonyl)pyrrolidine as a viscous oil (370 mg, 54%). 1H-NMR (300 MHz) analysis indicates a 1:1 mixture of amide rotamers (δ 2.07 and 2.09 singlets). Anal. Calcd for C20H27NO5 : C, 66.46; H, 7.53; N, 3.88. Found: C, 66.19; H, 7.58; N, 3.82.

後処理

  1. washwashed with 1M H3PO4
  2. dry with materialThe organic layer was dried over MgSO4
  3. filtrationfiltered
  4. concentrationconcentrated under reduced pressure

出典と根拠

ORDレコード
ord-eafbcf093f8340f2b19fcd86ac8da52b
出典データセット
uspto-grants-1997_09
特許番号
US05665754

反応ノート

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