Beilstein J. Org. Chem.2020,16, 1124–1134, doi:10.3762/bjoc.16.99
2,6-naphthalenedisulfonate (NDS, 2 equivalents) and the tetrahydrochloride salt of tetrakis(4-aminophenyl)methane (TAPM, 1 equivalent) in water gave a novel three-dimensional charge-assistedhydrogen-bondedframework (CAHOF, F-1). The framework F-1 was characterized by X-ray diffraction, TGA
, providing some dissolved F-1 as the real catalyst. In all cases, the catalyst could easily be recovered and recycled.
Keywords: Brønsted acid catalyst; charge-assistedhydrogen-bondedframework; Diels–Alder; epoxide ring opening; heterogeneous catalyst; Introduction
Tremendous successes in homogeneous
-assistedhydrogen-bondedframework (CAHOF), as was the case when multitopic guanidinium or amidinium cations were combined with polycarboxylates, polysulfonates, or polyphosphonates [30][31][32][33]. The synthesis of a HOF or CAHOF consists of simply mixing the two components together [29]. An additional