Reaktion #156108

Reaktionsgleichung

3-Amino-5-bromo pyridine

pyridine

isobutyryl chloride

→

N-(5-bromopyridin-3-yl)isobutyramide

Ausbeute 71.0%

Lösungsmittel

DCM

DCM

Reaktionsbedingungen

Aufarbeitung

1. 1
   Waschenwashed with water
2. 2
   ExtraktionThe organic extract
3. 3
   Sonstigewas dried
4. 4
   Einengenconcentrated
5. 5
   Sonstigepurified by column chromatography

Vorschrift

3-Amino-5-bromo pyridine (XVIII) (1 eq) was dissolved in DCM and cooled to 0° C. before adding pyridine (2.2 eq) and isobutyryl chloride (XIX) (1.1 eq). The reaction mixture was stirred at r.t. for 15 h until TLC showed the reaction was complete. The reaction mixture was diluted with DCM and washed with water. The organic extract was dried, concentrated and purified by column chromatography using silica gel (100-200 mesh) to afford N-(5-bromopyridin-3-yl)isobutyramide (XX) as a off white solid, (71% yield). 1H NMR (CDCl3) δ ppm 8.55-8.35 (m, 3H), 7.32 (s, 1H), 2.59-2.48 (m, 1H), 1.28-1.27 (d, 6H); ESIMS found C9H11BrN2O m/z 243.05 (M+H).

Quelle