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The trans isomer of the organogold(III) difluoride complex [PPh4][(CF3)2AuF2] has been obtained in a stereoselective way and in excellent yield by reaction of [PPh4][CF3AuCF3] with XeF2 under mild conditions. The compound is both thermally stable and reactive. Thus, the fluoride ligands are stereospecifically replaced by any heavier halide or by cyanide, the cyanide affording [PPh4][trans‐(CF3)2Au(CN)...
The synthesis of optically active interlocked and non‐interlocked 2‐azetidinones by intramolecular cyclization of N‐(α‐methyl)benzyl fumaramide [2]rotaxanes is described. Two different strategies of asymmetric induction were tested in which the chiral group was located either proximal or distal to the reacting center of the thread. During these experiments, an interesting equilibration process inside...
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