[3 + 2]-Cycloaddition reactions of alkynyl(phenyl)iodonium triflates with ethyl diazoacetate, N-t-butyl-α-phenyl nitrone and t-butylnitrileoxide as 1,3-dipoles

Article abstract of DOI:10.1016/S0040-4039(97)10418-X

The [3+2]-cycloaddition of various β-substituted ethynyliodonium salts, RC≡CI(+)OTf, with ethyl diazoacetate, N-t-butyl-a-phenyl nitrone and t-butylnitrile oxide results in single regioisomeric pyrroles, dihydroisoxozoles, and isoxazoles respectively in moderate yields.