TITLE:
ZnO Nanobelts: An Efficient Catalyst for Synthesis of 5-Arylidine-2,4-Thiazolidinediones and 5-Arylidine-Rhodanines
AUTHORS:
Suresh, Jagir S. Sandhu
KEYWORDS:
ZnO Nanobelts; Knoevenagel Condensation; 2, 4-Thiazolidinedione; Rhodanine; Solvent-Free
JOURNAL NAME:
International Journal of Organic Chemistry,
Vol.2 No.3A,
November
30,
2012
ABSTRACT: A facile preparation of ZnO nanobelts by chemical precipitation technique and its utility as catalyst in Knoevenagel condensation of 2,4-thiazolidinedione/rhodanine has been described. X-ray diffraction and transmission electron microscopy techniques revealed the formation ZnO nanobelts. Scanning electron microscopic observations indicate that the lengths of nanobelts are ranging from a few hundreds of micrometers to a few millimeters. Its use for the condensation of aldehydes and active methylene compounds under solvent free reaction condition at 90℃ afforded the corresponding products in excellent yields in minute time.