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Isophthalic and terephthalic acid monoesters of cyclic nigerosyl‐(1→6)‐nigerose (CNN), a cyclic tetrasaccharide composed of four d‐glucopyranosyl residues connected by alternating α‐1,3‐ and α‐1,6‐linkages, were synthesized as novel chiral supramolecular sensitizers for enantiodifferentiating photoisomerization of (Z)‐cyclooctene (1Z) to planar chiral (E)‐isomer (1E). Despite the saucer‐shaped shallow...
The generation of [PhSeF] and its use for fluoro-selenation of alkenes and alkynes were achieved by the electrochemical oxidation of diphenyl diselenide in Et 3 N 3HF-CH 2 Cl 2 -(Pt) system at 0°C. On continuing the oxidation, the initially formed fluoroselenides could be transformed to fluoroolefins via selenoxides and the selenenylating reagent could be recycled for fluorination...
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