Acidic ionic liquid-catalyzed synthesis of 1,3-diphenyl urea from aniline and carbon dioxide
YAO Sujie,ZHAO Xinqiang,AN Hualiang,WANG Yanji
CIESC Journal . 2012, (3): 812 -818 .  DOI: 10.3969/j.issn.0438-1157.2012.03.020