Basavarajappa A, Wang X, Miljanić OŠ. Cycloglycolurils: Hybrid Glycoluril-Cyclobenzil Macrocycles.
Org Lett 2024. [PMID:
38626464 DOI:
10.1021/acs.orglett.4c00835]
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Abstract
Two novel glycoluril macrocycles have been synthesized from cyclotetrabenzil and cyclotribenzoin precursors using solvent-free condensations with urea. The crystal structure of the cyclotetra(p-phenylene)glycoluril macrocycle shows a twisted ring conformation, while that of the cyclotri(m-phenylene)glycoluril hybrid exhibits a distinct tubular supramolecular packing. These structures establish a potentially broad new class of macrocycles with intriguing guest binding properties owing to their available N-H motifs.
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