Cyanogen Bromide → HCID 13881444, compound

Participants

Reaction Steps

500 ml of xylene are introduced into 1 liter four-necked flask equipped with a stirrer, reflux condenser, thermometer and dropping funnel of 100 ml capacity. 72.5 g (0.27 moles) of 1,2-bis(2',6'-dimethylphenyl-amino)-ethane are dissolved in the xylene, and a solution of 33.9 g (0.32 moles) of cyanogen bromide in 200 ml of xylene is added dropwise, within about 1.5 hours, to the stirred solution at an internal temperature of 110° to 115° C. After the addition the mixture is stirred for a further hour at 110° to 115° C. and then it is allowed to cool. The separated precipitate is filtered off, washed with xylene and diethyl ether, and dried at room temperature. 100.5 g (99.4%) of 1,3-bis(2',6'-dimethylphenyl)-2-imino-imidazolidine hydrobromide are obtained as colourless crystals melting at 289°-290° C.

Provenance & Evidence