The reaction of unstabilised 1,3,4-oxadiazolium-N-methanide 1,3-dipoles with alkenes: N-substituted Δ-2-pyrrolines: contrast with the 1,3,4-thiadiazolium analogue - Butler, Richard N.; Cloonan, Martin O.; Smyth, Georgina M.; McArdle, Patrick; Cunningham, Desmond (ARKIVOC, 2003)
doi: 10.3998/ark.5550190.0004.721