Four kinds of macrocyclic polyethers containing isobutenyl group and aromatic rings were synthesized. X-ray analyses of crystal structure revealed significant differences in conformation among the compounds studied, in spite of their similarity in chemical formula. One compound was found to capture
The synthesis and crystal structure analysis of novel macrocyclic peroxides
โ Scribed by Kevin J McCullough; Toyonari Ito; Takahiro Tokuyasu; Araki Masuyama; Masatomo Nojima
- Publisher
- Elsevier Science
- Year
- 2001
- Tongue
- French
- Weight
- 104 KB
- Volume
- 42
- Category
- Article
- ISSN
- 0040-4039
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โฆ Synopsis
Bis(syn-collidine)iodine(I) hexafluorophosphate-mediated cyclization of unsaturated hydroperoxides afforded the corresponding 11-to 16-membered macrocyclic peroxides having three peroxide units located within one ring. The crystal structures of three novel macrocyclic triperoxides were unambiguously determined by X-ray analysis.
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Enantiomerically pure and racemic forms of calixsalen-type macrocycles 1 and 2 were synthesized and their crystal structures were determined. The enantiomerically pure crystals of (S,S,S,S,S,S)-1 exhibited thermally reversible photochromism from yellow to orange-red upon photoirradiation in the soli
Condensation of 2,3-dihydroxybenzene-1,4-dicarbaldehyde and 1,2-phenylenediamine afforded a novel 30-membered macrocyclic hexaimine bearing six hydroxyl groups, in which a water molecule is trapped in the crystalline state.