Expeditious synthesis of bis-β-cyclodextrinyl-diazacrown-[2]cryptorotaxanes

Singular supramolecular self-assembling of bis-cyclodextrinyl-bis-lariat hosts with metal bis-aryl-sulfonates as guests

Interlocked [2]rotaxanes were built from bis-cyclodextrinyl-bis lariats (CD-Ls) and bis-aryl sulfonates by a spontaneous dual cation/anion self-assembling process. Original CD-L's have been synthesized in high yield by a one step “click” or Staudinger–Aza-Wittig (SAW) coupling reaction.

New ureas containing glycosyl and diphenylphosphinyl scaffolds: synthesis and the first attempts to use them in asymmetric synthesis

Chiral ureas containing glycosyl and diphenylphosphinyl scaffolds were found to be an effective organocatalyst. They were synthesised in high yields by a one-pot tandem Staudinger/aza-Wittig coupling reaction. The first attempts of using them in asymmetric synthesis are presented. Yields of the Morita-Baylis-Hillman reaction were moderate with an enantiomeric excess of up to 80%.