Cyanogen Bromide → (S)-1-(4-Bromo-2-butynyl)-3-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-2-pyrrolidinone

HRID 1079030Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1079030
C(N(CC)[CH2:4][C:5]#[C:6][CH2:7][N:8]1[CH2:12][CH2:11][C@H:10]([O:13][Si:14]([C:17]([CH3:20])([CH3:19])[CH3:18])([CH3:16])[CH3:15])[C:9]1=[O:21])C.N#C[Br:26]>C(OCC)C>[Br:26][CH2:4][C:5]#[C:6][CH2:7][N:8]1[CH2:12][CH2:11][C@H:10]([O:13][Si:14]([C:17]([CH3:20])([CH3:19])[CH3:18])([CH3:16])[CH3:15])[C:9]1=[O:21]

Komponenten

4

Edukt 2

HCID 10476Cyanogen BromideHCID 53818580(S)-1-[4-diethylamino-2-butynyl]-3-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-2-pyrrolidinone

Produkt 1

HCID 54240231(S)-1-(4-Bromo-2-butynyl)-3-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-2-pyrrolidinoneAusbeute 81,5 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 3283Diethyl EtherLösungsmittel

Versuchsvorschrift

A solution of 2.4 g of (S)-1-[4-diethylamino-2-butynyl]-3-[[(1,1-dimethylethyl)dimethylsilyl]oxy]-2-pyrrolidinone and 0.8 g of cyanogen bromide in 40 ml of diethyl ether is stirred at room temperature for 18 hours. The solution is washed with 30 ml of 1N hydrochloric acid and saturated sodium bicarbonate, dried and concentrated in vacuo. The residue is purified by chromatography (silica gel, methylene chloride) to give 2.0 g of the desired product as a colorless oil. [α]D26 =-31° (methylene chloride).

Aufarbeitung

  1. washThe solution is washed with 30 ml of 1N hydrochloric acid and saturated sodium bicarbonate
  2. customdried
  3. concentrationconcentrated in vacuo
  4. customThe residue is purified by chromatography (silica gel, methylene chloride)

Quellen und Nachweise

ORD-Eintrag
ord-c7ca2749abe546448987a90318b82987
Quelldatensatz
uspto-grants-1996_08
Patentnummer
US05550257

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