ALUMINA SUPPORTED POTASSIUM FLUORIDE PROMOTED REACTION OF NITROALKANES WITH ELECTROPHILIC ALKENES: SYNTHESIS OF 4,5-DIHYDRO FURANS AND ISOXAZOLINE N-OXIDES.

Article abstract of DOI:10.1016/S0040-4020(01)81729-4

The reaction of secondary nitro alkanes 1 with α,β-unsaturated ketones 2 in the presence of alumina-supported potassium fluoride in acetonitrile gave 4,5-dihydrofurans 3 in high yields; 1-nitropropane reacted with 2 to give a mixture of 4,5-dihydrofurans and furans.Nitroalkenes 17 reacted with nitroalkanes to give isoxazoline N-oxides 18 and 19 in good overall yields.