Ammonia → N-(4-Chlorobenzhydryl)thiourea

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

A solution of 4-chlorobenzhydryl isothiocyanate [5.2g (0.02M)] in 50 mls of dry ether at 0° C is treated with NH3 (anhyd.) for 1/2 hour while maintaining a temperature of 0° C with stirring. Stirring is continued an additional 1.5 hours at 9° to 10° C. during which time a white solid appears. The crude thiourea is filtered and washed thoroughly with ether; mp 173°-5° C. The filtrate is concentrated in vacuo to yield additional product. The combined crops of N-(4-chlorobenzhydryl) thiourea are used in the next step without further purification.

Herkunft & Nachweise