Sulfonated reduced graphene oxide as a highly efficient catalyst for direct amidation of carboxylic acids with amines using ultrasonic irradiation Maryam Mirza-Aghayan a,⇑, Mahdieh Molaee Tavana a, Rabah Boukherroub b

Sulfonated reduced graphene oxide as a highly efficient catalyst for direct amidation of carboxylic acids with amines using ultrasonic irradiation Maryam Mirza-Aghayan a,⇑, Mahdieh Molaee Tavana a, Rabah Boukherroub b

in Chemistry