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14-, 30-, and 56-Membered Azamacrocyclic Mannich Bases Built on Bispyrrolylphenylene Platforms: Isolation and Initial
Monalisa Giri1, Tapas Guchhait1
1Department of Chemistry, C. V. Raman Global University, Bhubaneswar, Odisha 752054, India.
None:
A hitherto unknown class of 14 (3)-, 30 (5)-, and 56-membered (4) azamacrocycles containing bispyrrolylphenylene moieties was synthesized via Mannich reactions and characterized by spectroscopic and crystallographic techniques. Among the observed [1 + 1 + 2], [2 + 2 + 4], [3 + 3 + 6], and [4 + 4 + 8] combinations of incorporated reactants in the crude product(s), three were isolated in pure forms. Acetate ions constrained in close proximity within the compartments of the di ([5H2]2+)- and tetraprotonated ([4H4]4+) macrocycles and one such complex existed in a dynamic equilibrium in solution.
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