457 research outputs found
Application of Δ- and Λ-Isomerism of Octahedral Metal Complexes for Inducing Chiral Nematic Phases
Get PDFThe Δ- and Λ-isomerism of octahedral metal complexes is employed as a source of chirality for inducing chiral nematic phases. By applying a wide range of chiral metal complexes as a dopant, it has been found that tris(β-diketonato)metal(III) complexes exhibit an extremely high value of helical twisting power. The mechanism of induction of the chiral nematic phase is postulated on the basis of a surface chirality model. The strategy for designing an efficient dopant is described, together with the results using a number of examples of Co(III), Cr(III) and Ru(III) complexes with C2 symmetry. The development of photo-responsive dopants to achieve the photo-induced structural change of liquid crystal by use of photo-isomerization of chiral metal complexes is also described
Gas-phase Meerwein reaction of epoxides with protonated acetonitrile generated by atmospheric pressure ionizations
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ChemInform Abstract: Reduction of Chiral β-Hydroxy Sulfoxides: Application to the Synthesis of Both Enantiomers of 4-Substituted Butenolides.
No full textChemInform Abstract: Optically Active α-Sulfinyl Epoxides: Precursors of Chiral Functionalized Homoallylic Alcohols.
No full textChemInform Abstract: Asymmetric Synthesis of Natural Products Monitored by Chiral Sulfoxides.
No full textChemInform Abstract: Stereoselective Synthesis of all-trans Methyl Substituted Polyenes by Reductive Elimination and Application to the Synthesis of all-trans 3-Methyl-nona-2,4,6-trienol.
No full textChemInform Abstract: Aromatic Ring Synthesis by 1,3-Michael-Claisen Annulation: Application to a Trolox Analogue and to Precocene II.
No full textChemInform Abstract: Asymmetric Synthesis of Polyhydroxylated Natural Products. Part 2. The C-1/C-12 Unit (I) of Amphotericin B.
No full textChemInform Abstract: Optically Active β-Keto Sulfoxides and Analogues in Asymmetric Synthesis
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