Water → tert-Butyl (2S)-2-(((4-methylbenzene-1-sulfonyl)oxy)methyl)pyrrolidine-1-carboxylate

HRID 45582

反応式

HRID 45582 の反応式
[C:1]([N:8]1[CH2:14][CH2:13][CH2:12][C@H:9]1[CH2:10][OH:11])([O:3][C:4]([CH3:7])([CH3:6])[CH3:5])=[O:2].[C:15]1([CH3:25])[CH:20]=[CH:19][C:18]([S:21](Cl)(=[O:23])=[O:22])=[CH:17][CH:16]=1.C(N(CC)CC)C.O>ClCCl.CN(C)C1C=CN=CC=1>[S:21]([O:11][CH2:10][C@@H:9]1[CH2:12][CH2:13][CH2:14][N:8]1[C:1]([O:3][C:4]([CH3:7])([CH3:6])[CH3:5])=[O:2])([C:18]1[CH:19]=[CH:20][C:15]([CH3:25])=[CH:16][CH:17]=1)(=[O:23])=[O:22]

参加物

7

反応物 4

HCID 962WaterHCID 73974-Toluenesulfonyl chlorideHCID 8471TriethylamineHCID 643448(S)-(-)-N-Boc-prolinol

生成物 1

HCID 11783214tert-Butyl (2S)-2-(((4-methylbenzene-1-sulfonyl)oxy)methyl)pyrrolidine-1-carboxylate収率 99%

試薬・触媒・溶媒 2

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

実験手順

A solution of N-Boc-L-prolinol (51.2 g, 254 mmol) in dichloromethane (250 mL) was cooled to 0° C., and thereto were added p-toluenesulfonylchloride (53.4 g, 280 mmol), triethylamine (30.9 g, 42.6 mL, 305 mmol), and 4-dimethylaminopyridine (5.00 g, 40.9 mmol). After stirring overnight at room temperature, to the mixture was added water, and the aqueous layer was extracted with ethyl acetate. The organic layer was washed with water and brine, and then dried over sodium sulfate, and concentrated under reduced pressure. The obtained residue was purified with silica gel column (hexane/ethyl acetate=70/30 to 30/70) to give the title compound (89.7 g, 250 mmol, 99%).

後処理

  1. extractionthe aqueous layer was extracted with ethyl acetate
  2. washThe organic layer was washed with water and brine
  3. dry with materialdried over sodium sulfate
  4. concentrationconcentrated under reduced pressure
  5. customThe obtained residue was purified with silica gel column (hexane/ethyl acetate=70/30 to 30/70)

出典と根拠

ORDレコード
ord-b59673d570cf48c78b6d783fc4727013
出典データセット
uspto-grants-2013_09
特許番号
US08541585B2

関連ノート

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