Chemistry Letters
Online ISSN : 1348-0715
Print ISSN : 0366-7022
ISSN-L : 0366-7022
Volume 40 , Issue 1
Showing 1-41 articles out of 41 articles from the selected issue
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  • David Scheschkewitz
    2011 Volume 40 Issue 1 Pages 2-11
    Published: January 05, 2011
    Released: November 25, 2010
    JOURNALS FREE ACCESS
    Since the first isolation of a disila analog to vinyl anion synthons, namely lithium disilenide Tip2Si=Si(Tip)Li (Tip: 2,4,6-triisopropylphenyl), the number of available disilenides and their synthetic applications have rapidly expanded. Derivatives with aryl, silyl, alkyl, and hydrogen substituents have been reported and even one cyclic derivative is available. Disilenides can be used to introduce the Si=Si unit to a variety of organic and inorganic substrates. Depending on whether products feature sufficiently reactive residual functionality, the Si=Si bond is either retained or undergoes further (so far intramolecular) transformations. Heteroatom-substituted disilenes are easily accessible via disilenides. Using Tip2Si=Si(Tip)Li as a starting material, for instance, a variety of otherwise inaccessible compounds can be prepared: conjugated systems with more than one Si=Si unit, η1-transition-metal complexes, functional homo- and heteronuclear silacycles, and molecular silicon clusters with substituent-free vertices. In this review article, an account on the chemistry of disilenides is given.
    Disilenides can be used to introduce the Si=Si unit to a variety of organic and inorganic substrates, the Si=Si bond is either retained or undergoes further transformations. Heteroatom-substituted disilenes are easily accessible via disilenides. A variety of otherwise inaccessible compounds can be prepared: conjugated systems with more than one Si=Si unit, η1-transition-metal complexes, functional homo- and heteronuclear silacycles, and molecular silicon clusters with substituent-free vertices. Fullsize Image
  • Shinji Toyota
    2011 Volume 40 Issue 1 Pages 12-18
    Published: January 05, 2011
    Released: November 25, 2010
    JOURNALS FREE ACCESS
    We propose strategies to construct chiral macrocycles by modification of the fundamental compound, 1,8-anthrylene–ethynylene cyclic tetramer, which features a diamond-prism structure. The incorporation of other anthracene units or diacetylene linkers produces structures of various symmetries. The enantiomers of some chiral derivatives could be resolved by chiral HPLC. The structures, dynamic behavior, and chiroptical properties of these macrocycles are summarized.
    We propose strategies to construct chiral macrocycles by modification of the fundamental compound, 1,8-anthrylene–ethynylene cyclic tetramer. The enantiomers of some chiral derivatives could be resolved by chiral HPLC. The structures, dynamic behavior, and chiroptical properties of these macrocycles are summarized. Fullsize Image
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