Fig. 11

Catalytic performances synthesis of pyrimidine-5-carbonitrile catalyzed by bone char-nPrN-SO3H at different amounts of catalyst. Error bars indicate the range of data based on repeat experiments.

Catalytic performances synthesis of pyrimidine-5-carbonitrile catalyzed by bone char-nPrN-SO3H at different amounts of catalyst. Error bars indicate the range of data based on repeat experiments.