Paal-Knorr Condensation for the Synthesis of Pyrrole Derivatives Under Ultrasound Irradiation
ZHANG Shu-wen,ZHANG Xing,WEI Bao-jun,HAO Peng-peng
Journal of Hebei University (Natural Science Edition) . 2009, (6): 618 -622 .  DOI: 10.3969/j.issn.1000-1565.2009.06.015