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Efficient protocols for microwave‐assisted catalyzed amination of halogeno‐phenothiazines are described. Phenothiazine analogues of Tröger's base (PTB) were obtained by condensation of amino‐phenothiazines with formaldehyde in HCl/EtOH/H2O and structurally characterized by NMR and XRD analyses. The formation of PTB isomers was predicted by computational analysis based on theoretical methods (DFT and...
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