R. Mukhopadhyay et al., SYNTHESIS OF CHIRAL PYRAN DERIVATIVES FROM A 3-O-ALLYLFURANOSE-5-ALDEHYDE BY THE APPLICATION OF INTRAMOLECULAR 1,3-DIPOLAR NITRILE OXIDE CYCLOADDITION, Indian journal of chemistry. Sect. B: organic chemistry, including medical chemistry, 35(11), 1996, pp. 1190-1193
The chiral pyranoisoxazoline 5 is formed as the exclusive product in t
he intramolecular 1,3-dipolar nitrile oxide cycloaddition of 4 derived
from the oxime of 3-O-allylfuranose-5-aldehyde 2, and is converted to
the tetrasubstituted pyran 8.