N. Devi, S. Sultana, Madhurjya Borah
Nov 21, 2018
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0
Influential Citations
7
Citations
Journal
The Journal of organic chemistry
Abstract
Bismuth trifluoromethanesulfonate can be efficiently used for the preparation of dihydropyrans from β-allenols and aldehydes by oxonium-ene reaction in good yields. The reaction is highly regioselective. On the other hand, the same reaction with trimethylsilyl trifluoromethanesulfonate at -45 °C affords the hexahydropyrano[4,3- b]pyran skeleton in moderate yields.