Hemant Sharma, Narinder Singh and Doo Ok Jang
Green Chem., 2014,16, 4922-4930
DOI:
10.1039/C4GC01142B,
Paper
A convenient solvent-free method for the synthesis of benzothiazole, benzimidazole, and benzoxazole derivatives has been developed using recyclable ZnO-NPs via a ball-milling strategy. The method affords environmentally friendly reaction conditions that score high on the ecoscale with the low E-factor. The process is also highly efficient even on a multi-gram scale and provides easy product isolation.