Readily functionalized AAA–DDD triply hydrogen-bonded motifs†
Feng Tong,Yi-Fei Han
Organic & Biomolecular Chemistry Pub Date : 03/27/2018 00:00:00 , DOI:10.1039/C8OB00479J
Abstract

Herein we present a new, readily functionalized AAA–DDD hydrogen bond array. A novel AAA monomeric unit (3a–b) was obtained from a two-step synthetic procedure starting with 2-aminonicotinaldehyde via microwave radiation (overall yield of 52–66%). 1H NMR and fluorescence spectroscopy confirmed the complexation event with a calculated association constant of 1.57 × 107 M−1. Likewise, the usefulness of this triple hydrogen bond motif in supramolecular polymerization was demonstrated through viscosity measurements in a crosslinked supramolecular alternating copolymer.

Graphical abstract: Readily functionalized AAA–DDD triply hydrogen-bonded motifs