Triethylamine → 3-Chloro-2-(7-chloro-1,3-benzodioxol-5-yl)-4,4,4-trifluoro-but-2-enenitrile

Participants

Reaction Conditions

Reaction Steps

2-(7-chloro-1,3-benzodioxol-5-yl)-4,4,4-trifluoro-3-oxo-butanenitrile (23.9 g, 82 mmol) was treated with POCl3 (62.0 g, 0.41 mol) and then triethylamine (11.4 mL, 82 mmol) was added. The reaction mixture was heated for 3 h at 80-100° C. and then carefully poured into warm water. The product was then extracted ethyl acetate, washed with water and brine, dried, filtered and concentrated to give the title compound (20.2 g; 80%) and used for the next step directly.

Provenance & Evidence