1. Catalysts and Organic Synthesis Research Laboratory Department of Chemistry Iran University of Science and Technology Tehran 16846‐13114 Iran
2. Department of Nuclear Medicine West China Hospital Sichuan University No. 37, Guoxue Alley Chengdu Sichuan Province 610041 P. R. China
3. Department of Chemistry and Biochemistry Wilfrid Laurier University 75 University Ave. W. Waterloo Ontario N2L 3C5 Canada