Reaktion #88555

Reaktionsgleichung

(S)-tert-butyl 1-(6-cyano-9-((2-(trimethylsilyl)ethoxy)methyl)-9H-dipyrido[2,3-b;4′,3′-d]pyrrol-4-yl)pyrrolidin-3-yl(ethyl)carbamate

sodium acetate

bromine

→

title compound

(S)-tert-butyl 1-(3-bromo-6-cyano-9-((2-(trimethylsilyl)ethoxy)methyl)-9H-dipyrido[2,3-b;4′,3′-d]pyrrol-4-yl)pyrrolidin-3-yl(ethyl)carbamate

Lösungsmittel

acetic acid

ethyl acetate

Reaktionsbedingungen

Aufarbeitung

1. 1
   Waschenwashed with water (20 mL)
2. 2
   SonstigeThe organic layer was separated
3. 3
   Trocknendried over sodium sulfate
4. 4
   Filtrationfiltered
5. 5
   Einengenconcentrated in vacuo
6. 6
   Sonstigepurified by flash chromatography (silica, 4 g, ISCO, 0-50% ethyl acetate in heptane)

Vorschrift

A mixture of (S)-tert-butyl 1-(6-cyano-9-((2-(trimethylsilyl)ethoxy)methyl)-9H-dipyrido[2,3-b;4′,3′-d]pyrrol-4-yl)pyrrolidin-3-yl(ethyl)carbamate (125 mg, 0.23 mmol), sodium acetate (38 mg, 0.46 mmol), and bromine (36 μL, 0.7 mmol) in acetic acid (1 mL) was stirred at ambient temperature for 1 minute. The reaction mixture was diluted with ethyl acetate (50 mL), and washed with water (20 mL). The organic layer was separated, dried over sodium sulfate, filtered, concentrated in vacuo, and purified by flash chromatography (silica, 4 g, ISCO, 0-50% ethyl acetate in heptane) to afford the title compound as a pale yellow oil, which was used in the next step without any further purification (65 mg).

Quelle