The [3+2]-cycloaddition reaction of isoselenocyanates with oxiranes using BF3·Et2O is temperature dependent affording generally either substituted 2-imino-1,3-oxaselenolanes (−5 °C) or 1,3-oxazolidinones (40 °C) in short reaction times with high yields.
![Graphical abstract: Role of temperature in [3+2]-cycloaddition of isoselenocyanates with oxiranes using BF3·Et2O](/en/Image/Get?imageInfo.ImageType=GA&imageInfo.ImageIdentifier.ManuscriptID=C2RA00042C&imageInfo.ImageIdentifier.Year=2012)
M. Sengoden and T. Punniyamurthy, RSC Adv., 2012, 2, 2736 DOI: 10.1039/C2RA00042C
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