Abstract
Investigation of the cycloaddition of C,N-diarylnitrones to methyl cinnamate under different reaction conditions were carried out. Two diastereoisomeric and one regioisomeric cycloadducts were isolated and characterized by spectroscopic and x-ray data. Remarkable change in selectivity was noticed in solvent-free condition and in the presence of ytterbium triflate as catalyst.
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ACKNOWLEDGMENT
The authors thank the Indian Council for Cultural Relations (ICCR) for financial assistance to P. K. Biswas (present address: BCSIR Laboratory, Dhanmondi, Dhaka-1205, Bangladesh).
Notes
Present affiliation for Debasish Bandyopadhyay: Department of Chemistry, University of Texas–Pan American, Edinburg, Texas, USA.