Enhancement of catalytic reactivity of zinc(II) complex by a cyclotriveratrylene-capped structure

Absolute Configuration and Enantiodifferentiation of a Hemicryptophane Incorporating an Azaphosphatrane Moiety

“…The hemicryptophane hosts combine a CTB unit together with a second binding site with C 3 symmetry, giving them a ditopic nature. [8][9][10] They were found to be a novel class of efficient supramolecular catalysts, 11,12 ion pair, 13 or zwitterions receptors 14,15 and led to the design of novel molecular mechanical components as propeller or gyroscope. 16,17 Enantiopure hemicryptophanes 18 have also been synthesized showing enantioselective recognition of carbohydrate derivatives with, in most cases, a specific complexation of the M-hosts compared with the P-hosts.…”

Oxidation of cycloalkanes by H2O2 using a copper–hemicryptophane complex as a catalyst

“…Among the catalysts based on cyclodextrin, calixarene or cucurbituril derivatives that can enhance the catalytic activity by guest encapsulation, 16 the hemicryptophane hosts, combining a recognition and a catalytic site in their inner molecular cavity, appear very promising. 17,18 Herein we report the first use of a hemicryptophane copper complex 1 (Chart 1) for the oxidation of CyH to CyOH and CyQO. Unlike most of the supramolecular metal catalysts, which frequently suffer from product inhibition and require relatively large catalyst loadings, we show that 1 is able to efficiently catalyze the alkane oxidation with H 2 O 2 as a clean oxidant under mild conditions.…”

Covalent Cages with Inwardly Directed Reactive Centers as Confined Metal and Organocatalysts

“…Makita et al have reported a zinc(II) complex trapped into the cavity of a hemicryptophane, and its use as a catalyst for the hydrolysis of methyl para ‐nitrophenyl carbonate (MPC) (Figure ) , . The supramolecular catalyst turned out to be more efficient than the model since a k ( 20 )/ k ( 21 ) ratio up to 2.2 was measured.…”