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1,3-DIPOLAR CYCLOADDITION REACTIONS OF SOME 1-ARYL-PYRIDINIUM-3-OLATES

1993-07-01
CELEBI, N
CETINER, O
GULEC, A
Türker, Burhan Lemi
In this study, the reactivities of 1-(2,4-dinitrophenyl)-, 1-(4,6-dimethylpyrimidin-2-yl)-, and 1-(5-nitro-2-pyridyl)-pyridinium-3-olates were tested upon various inductively and mesomerically electron rich dipolarophiles. N-substituted pyridinium-3-olates react across the 2,6-positions with 2pi-dipolarophiles whereas 4pi-dipolarophiles added across both 2,6 and 2,4 positions of the betaines.