Synthesis of 2-Aminobenzonitrile: 2-Aminobenzamide was dehydrated to 2-aminobenzonitrile without protection of the amino group in the presence of phenylphosphonyl dichloride and pyridine. The highest yield of 96% was obtained using reagent 2d, while reagents 2a-c yielded less than 60%.
The reagents used for the reaction included phosphoryl chloride (2a), phenyl phosphoryl dichloride (2b), 4-chlorophenyl phosphoryl dichloride (2c), and phenylphosphonic dichloride (2d) in pyridine.
synthesis of aminobenzonitrile by dehydration of aminobenzamide using phenylphosphonic dichloride in pyridine
