2,4-Bis(trichloromethyl)-2H,4H-1,3-benzodioxine-6-carboxamide → 2,4-Bis(dichloromethylidene)-2H,4H-1,3-benzodioxine-6-carboxamide

Participants

Reaction Steps

A mixture of 2,4-bis(trichloromethyl)benzo[1,3]dioxin-6-carboxamide (3.14 g.) and potassium t-butoxide (2.5 g.) in 50% aqueous dimethylsulphoxide (50 ml.) was heated at 80°-90° C. for 2 hours. The solid product was filtered off, dried and crystallised from ethanol to give 2,4-bis(dichloromethylene)benzo[1,3]dioxin-6-carboxamide, m.p. 217°-218° C.

Provenance & Evidence