Enantiodifferentiating Z-E photoisomerization of cyclooctene sensitized by DNA and RNA
نویسندگان
چکیده
منابع مشابه
Cyclodextrin nanosponge-sensitized enantiodifferentiating photoisomerization of cyclooctene and 1,3-cyclooctadiene
Enantiodifferentiating geometrical photoisomerizations of (Z)-cyclooctene and (Z,Z)-1,3-cyclooctadiene were performed by using the pyromellitate-linked cyclodextrin network polymer, termed "cyclodextrin nanosponge (CDNS)", as a supramolecular sensitizing host. The photochirogenic behavior of the nanosponges incorporating β- or γ-cyclodextrin was significantly different from that reported for th...
متن کاملEntropy-controlled supramolecular photochirogenesis: enantiodifferentiating Z-E photoisomerization of cyclooctene included and sensitized by permethylated 6-O-benzoyl-beta-cyclodextrin.
In contrast to the photosensitization with a non-methylated analogue, supramolecular photochirogenesis with a novel permethylated mono(6-O-benzoyl)-beta-cyclodextrin exhibited a critical dependence of the product's enantiomeric excess upon temperature, and possessed a large differential entropy of activation (-11 J K(-1) mol(-1)) for which the flexible host skeleton is likely to be responsible.
متن کاملFirst photosensitized enantiodifferentiating isomerization by optically active sensitizer immobilized in zeolite supercages.
Enantiodifferentiating photoisomerization of (Z)-cyclooctene sensitized by (R)- or (S)-1-methylheptyl benzoate immobilized in zeolite supercages afforded the respective enantiomer pair, (-)- and (+)-(E)-isomer (1E) in 5% enantiomeric excess, whilst racemic 1E was obtained upon homogeneous-phase photosensitization with the same antipodal sensitizer pair, thus demonstrating for the first time tha...
متن کاملStereoselective E/Z photoisomerization of oxazolidinone functionalized enecarbamates: direct and triplet sensitized irradiation.
Oxazolidinone-functionalized enecarbamates undergo diastereoselective E/Z photoisomerization upon direct and triplet sensitized irradiations with chiral/achiral sensitizers, showing that the enhanced product diastereoselectivity depends on the solvent and temperature.
متن کاملChiral Photochemistry in Sub- and Supercritical Carbon Dioxide. Sudden Jump of Optical Yield in Asymmetric Z-e Photoisomerization of Cyclooctene
Yoshihisa Inoue, ‡ Ryota Saito, Masayuki Kaneda, and Takehiko Wada † ICORP Entropy Control Project, JST, 4-6-3 Kamishinden, Toyonaka 560-0085, Japan ‡ Department of Molecular Chemistry, Osaka University, 2-1Yamada-oka, Suita 565-0871, Japan § Department of Applied Chemistry, Seikei University, 3-3-1 Kichijoji-Kitamachi, Musashino 180-8633, Japan (fax +81-6-6879-7923; e-mail: [email protected]...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Nucleic Acids Symposium Series
سال: 2000
ISSN: 0261-3166,1746-8272
DOI: 10.1093/nass/44.1.115