Carbon tetrabromide → (3S)-3-(2-Bromoethyl)-4-methyl-5-oxo-1-[(1R)-1-phenylethyl]pyrrolidine-3-carboxylic acid tert-butyl ester

HRID 1917309노트

반응식

HRID 1917309 반응식
[C:1]([Br:5])(Br)(Br)Br.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.[C:25]([O:29][C:30]([C@@:32]1([CH2:47]CO)[CH:36]([CH3:37])[C:35](=[O:38])[N:34]([C@@H:39]([C:41]2[CH:46]=[CH:45][CH:44]=[CH:43][CH:42]=2)[CH3:40])[CH2:33]1)=[O:31])([CH3:28])([CH3:27])[CH3:26]>ClCCl>[C:25]([O:29][C:30]([C@@:32]1([CH2:47][CH2:1][Br:5])[CH:36]([CH3:37])[C:35](=[O:38])[N:34]([C@@H:39]([C:41]2[CH:42]=[CH:43][CH:44]=[CH:45][CH:46]=2)[CH3:40])[CH2:33]1)=[O:31])([CH3:26])([CH3:27])[CH3:28]

참가 물질

5

반응물 3

HCID 11205Carbon tetrabromideHCID 11776TriphenylphosphineHCID 67490980(3S)-3-(2-Hydroxyethyl)-4-methyl-5-oxo-1-[(1R)-1-phenylethyl]pyrrolidine-3-carboxylic acid tert-butyl ester

생성물 1

HCID 67491046(3S)-3-(2-Bromoethyl)-4-methyl-5-oxo-1-[(1R)-1-phenylethyl]pyrrolidine-3-carboxylic acid tert-butyl ester수율 70.4%

시약·촉매·용매 1

HCID 6344Dichloromethane용매

실험 절차

Carbon tetrabromide (1.64 g, 4.95 mmol) and triphenylphosphine (1.30 g, 4.95 mmol) were sequentially added to a solution of (3S)-3-(2-hydroxyethyl)-4-methyl-5-oxo-1-[(1R)-1-phenylethyl]pyrrolidine-3-carboxylic acid tert-butyl ester (1.56 g, 4.50 mmol) in dichloromethane (20 mL) in a nitrogen atmosphere at 0° C. After heating to room temperature, the reaction solution was stirred for 10 minutes and concentrated to about 5 mL. The residue was purified by silica gel column chromatography (dichloromethane→hexane:ethyl acetate=4:1→2:1→1.5:1) to give 1.30 g (70%) of the diastereomer mixture title compound as a white solid.

후처리

  1. concentrationconcentrated to about 5 mL
  2. customThe residue was purified by silica gel column chromatography (dichloromethane→hexane:ethyl acetate=4:1→2:1→1.5:1)

출처 및 근거

ORD 기록
ord-ee04842e138b431cb727a2b4fd0b403c
출처 데이터셋
uspto-grants-2013_12
특허 번호
US08618094B2

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