An electrochemical deborylative selenylation of arylboronic acids has been developed to produce aryl selenoethers in good yields, whose practicability has been highlighted through the synthesis of bioactive molecules and gram-scale preparation.
Electrochemical N-cyanation of secondary amines and α C-cyanation of tertiary amines have been established under transition metal-free conditions, which provide cyanamides and nitriles with good functional group tolerance from simple systems.
Recently, He et al. [On quasi-weakly almost periodic points. Sci. China Math., 56, 597-606 (2013)] constructed two binary sub-shifts to solve an open problem posed by Zhou and Feng in [Twelve open problems on the exact value of the Hausdorff measure and on topological entropy: A brief survey of recent results. Nonlinearity, 17, 493-502 (2004)]. In this paper, we study more dynamical properties of those two binary sub-shifts. We show that the first one has zero topological entropy and is transitive but not weakly mixing, while the second one has positive topological entropy and is strongly mixing.
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