Tetrahedron Letters p. 5123 - 5126 (1985)
Update date:2022-08-04
Topics:
Dorn, Helmut
Highly polar 1,3-dipoles like pyrazolid-3-one azomethinimines stereospecifically add polar dipolarophiles.A suggested "non cisoid" adduct of E-β-nitrostyrene is generated by epimerization at C-2, catalysed by Kieselgel 40 MERCK and small amounts of pyrazolid-3-one.
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