Acetic acid, 2-(triphenylphosphoranylidene)-, ethyl ester → (E)-Ethyl 3-(6-chloro-4-(methylamino)pyridin-3-yl)acrylate

Beteiligte Stoffe

Reaktionsschritte

To a solution of 6-chloro-4-(methylamino)pyridine-3-carboxaldehyde (3.41 g, 20 mmol) in THF (120 mL) was added (carbethoxymethylene)triphenylphosphorane (8.35 g, 24 mmol). The mixture was heated at reflux for 16 h, and was then cooled and concentrated. The residue was chromatographed on silica gel (12% ethyl acetate in hexanes eluant) to provide the title compound. MS (m/z) 241.0 (M+1).

Herkunft & Nachweise