An efficient one-pot route to symmetrically and unsymmetrically substituted 1, 4, 7-triazacyclononanes also results in the isolation of a stable macrocyclic aminal
S Pulacchini, M Watkinson
Index: Pulacchini, Sonia; Watkinson, Michael Tetrahedron Letters, 1999 , vol. 40, # 52 p. 9363 - 9365
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Abstract
A one-pot methodology has been developed for the direct synthesis of symmetrically and unsymmetrically N-substituted derivatives of 1, 4, 7-triazacyclononane. In the course of these studies the unexpected eight-membered cyclic aminal 7 has been isolated via an acid- catalysed rearrangement of enamine 5.
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