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Herein, we report a catalyst-free synthesis of C3-halo substituted bicyclo[1.1.1]pentylamines under mild conditions. The reaction involves the use of sodium hypohalites and sulfonamides to generate N-halosulfonamides in situ, which subsequently...

The friction characteristics of POM-40Cr are studied. The influence of each factor including the roughness, lubricant, pressure, contact area and speed on the friction force are determined by rotating motion pin-on-disc experiments in CETR-UTM friction testing machine. At the same time, the Stribeck curve of POM-40Cr is observed according to the change of velocity. Finally, the friction hysteresis phenomenon is studied by reciprocating pin-on-block experiments.