Triethylamine → 1,1-Dimethylethyl (2S,4R)-4-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-2-[[(methylsulfonyl)oxy]methyl]-1-pyrrolidinecarboxylate

HRID 406494

反応式

HRID 406494 の反応式
[Si:1]([O:8][C@H:9]1[CH2:13][N:12]([C:14]([O:16][C:17]([CH3:20])([CH3:19])[CH3:18])=[O:15])[C@H:11]([CH2:21][OH:22])[CH2:10]1)([C:4]([CH3:7])([CH3:6])[CH3:5])([CH3:3])[CH3:2].C(N(CC)CC)C.[CH3:30][S:31](Cl)(=[O:33])=[O:32]>C(Cl)Cl>[C:17]([O:16][C:14]([N:12]1[CH2:13][C@H:9]([O:8][Si:1]([C:4]([CH3:7])([CH3:6])[CH3:5])([CH3:3])[CH3:2])[CH2:10][C@H:11]1[CH2:21][O:22][S:31]([CH3:30])(=[O:33])=[O:32])=[O:15])([CH3:20])([CH3:19])[CH3:18]

参加物

5

反応物 3

HCID 8471TriethylamineHCID 31297Methanesulfonyl chlorideHCID 11078078tert-butyl (2S,4R)-4-((tert-butyldimethylsilyl)oxy)-2-(hydroxymethyl)pyrrolidine-1-carboxylate

生成物 1

HCID 141170081,1-Dimethylethyl (2S,4R)-4-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-2-[[(methylsulfonyl)oxy]methyl]-1-pyrrolidinecarboxylate収率 91.5%

試薬・触媒・溶媒 1

HCID 6344Dichloromethane溶媒

実験手順

To a solution of (2S,4R)-tert-butyl 4-(tert-butyldimethylsilyloxy)-2-(hydroxymethyl)pyrrolidine-1-carboxylate (4.72 g, 14.2 mmol) and triethylamine (3.97 mL, 28.5 mmol) in DCM (30 mL) cooled to 0° C. was added methanesulfonyl chloride (1.66 mL, 21.9 mmol). The reaction mixture was stirred overnight while the ice bath was allowed to warm to room temperature. The solvent was removed under reduced pressure and the residue partitioned between EtOAc and water. The organic phase was washed with 1N phosphoric acid (100 mL), water (100 mL), saturated sodium bicarbonate solution (100 mL) and brine (100 mL) and then was dried over magnesium sulfate and concentrated to yield (2S,4R)-tert-butyl-4-(tert-butyldimethylsilyloxy)-2-((methylsulfonyloxy)methyl)pyrrolidine-1-carboxylate (5.34 g, 13.0 mmol) as a colorless oil. RP-HPLC (Table 1, Method f) Rt 6.25 min; m/z: (M−H)− 468.

後処理

  1. customThe solvent was removed under reduced pressure
  2. customthe residue partitioned between EtOAc and water
  3. washThe organic phase was washed with 1N phosphoric acid (100 mL), water (100 mL), saturated sodium bicarbonate solution (100 mL) and brine (100 mL)
  4. dry with materialwas dried over magnesium sulfate
  5. concentrationconcentrated

出典と根拠

ORDレコード
ord-887e9fb82e894f80845ed863eb55015c
出典データセット
uspto-grants-2014_06
特許番号
US08754107B2

関連ノート

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