Photochemical Cyclisation of Phthalimide Mannich Bases
Ultraviolet irradiation of Mannich bases derived from phthalimide, formaldehyde, and a secondary amine leads to cyclised products containing a new imidazolidine ring.The reaction is much less efficient when the secondary amine has an aromatic group adjacent to the nitrogen atom.Exceptionally, the Mannich base derived from 3-pyrroline does not cyclise but undergoes an internal oxidation-reduction reaction to give a substituted pyrrole.
Coyle, John D.,Newport, Graham L.
p. 93 - 96
(2007/10/02)
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