The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform
Sadahito Aoshima - One of the best experts on this subject based on the ideXlab platform.
-
Quantitative synthesis of star shaped poly vinyl ether s with a narrow molecular weight distribution by living cationic polymerization
Journal of the American Chemical Society, 2006Co-Authors: Takaho Shibata, Shokyoku Kanaoka, Sadahito AoshimaAbstract:Star-shaped poly(vinyl ether)s with narrow molecular weight distributions were obtained from polymer-linking reactions of living polymers with a divinyl compound based on living cationic polymerization. For example, living polymers (DPn = 50−300) of isobutyl vinyl ether (IBVE), prepared with a cationogen/EtAlCl2 at 0 °C in hexane in the presence of ethyl acetate, were allowed to react with a small amount of 1,4-cyclohexanedimethanol divinyl ether (DVE-1) to give a star-shaped poly(IBVE) in Quantitative Yield (100%). In addition, a notable feature of this star-shaped polymer was extremely narrow molecular weight distribution (Mw/Mn = 1.1−1.2). The structure of divinyl compounds and reaction conditions for the linking reaction are key factors for achieving Quantitative Yield of star-shaped polymers. To our best knowledge, this is the first example of selective preparation of star-shaped polymers with narrow molecular weight distribution via one-pot polymer-linking reactions, which has never been achieved in...
-
Quantitative synthesis of star shaped poly vinyl ether s with a narrow molecular weight distribution by living cationic polymerization
Journal of the American Chemical Society, 2006Co-Authors: Takaho Shibata, Shokyoku Kanaoka, Sadahito AoshimaAbstract:Star-shaped poly(vinyl ether)s with narrow molecular weight distributions were obtained from polymer-linking reactions of living polymers with a divinyl compound based on living cationic polymerization. For example, living polymers (DPn = 50−300) of isobutyl vinyl ether (IBVE), prepared with a cationogen/EtAlCl2 at 0 °C in hexane in the presence of ethyl acetate, were allowed to react with a small amount of 1,4-cyclohexanedimethanol divinyl ether (DVE-1) to give a star-shaped poly(IBVE) in Quantitative Yield (100%). In addition, a notable feature of this star-shaped polymer was extremely narrow molecular weight distribution (Mw/Mn = 1.1−1.2). The structure of divinyl compounds and reaction conditions for the linking reaction are key factors for achieving Quantitative Yield of star-shaped polymers. To our best knowledge, this is the first example of selective preparation of star-shaped polymers with narrow molecular weight distribution via one-pot polymer-linking reactions, which has never been achieved in...
Takaho Shibata - One of the best experts on this subject based on the ideXlab platform.
-
Quantitative synthesis of star shaped poly vinyl ether s with a narrow molecular weight distribution by living cationic polymerization
Journal of the American Chemical Society, 2006Co-Authors: Takaho Shibata, Shokyoku Kanaoka, Sadahito AoshimaAbstract:Star-shaped poly(vinyl ether)s with narrow molecular weight distributions were obtained from polymer-linking reactions of living polymers with a divinyl compound based on living cationic polymerization. For example, living polymers (DPn = 50−300) of isobutyl vinyl ether (IBVE), prepared with a cationogen/EtAlCl2 at 0 °C in hexane in the presence of ethyl acetate, were allowed to react with a small amount of 1,4-cyclohexanedimethanol divinyl ether (DVE-1) to give a star-shaped poly(IBVE) in Quantitative Yield (100%). In addition, a notable feature of this star-shaped polymer was extremely narrow molecular weight distribution (Mw/Mn = 1.1−1.2). The structure of divinyl compounds and reaction conditions for the linking reaction are key factors for achieving Quantitative Yield of star-shaped polymers. To our best knowledge, this is the first example of selective preparation of star-shaped polymers with narrow molecular weight distribution via one-pot polymer-linking reactions, which has never been achieved in...
-
Quantitative synthesis of star shaped poly vinyl ether s with a narrow molecular weight distribution by living cationic polymerization
Journal of the American Chemical Society, 2006Co-Authors: Takaho Shibata, Shokyoku Kanaoka, Sadahito AoshimaAbstract:Star-shaped poly(vinyl ether)s with narrow molecular weight distributions were obtained from polymer-linking reactions of living polymers with a divinyl compound based on living cationic polymerization. For example, living polymers (DPn = 50−300) of isobutyl vinyl ether (IBVE), prepared with a cationogen/EtAlCl2 at 0 °C in hexane in the presence of ethyl acetate, were allowed to react with a small amount of 1,4-cyclohexanedimethanol divinyl ether (DVE-1) to give a star-shaped poly(IBVE) in Quantitative Yield (100%). In addition, a notable feature of this star-shaped polymer was extremely narrow molecular weight distribution (Mw/Mn = 1.1−1.2). The structure of divinyl compounds and reaction conditions for the linking reaction are key factors for achieving Quantitative Yield of star-shaped polymers. To our best knowledge, this is the first example of selective preparation of star-shaped polymers with narrow molecular weight distribution via one-pot polymer-linking reactions, which has never been achieved in...
Shokyoku Kanaoka - One of the best experts on this subject based on the ideXlab platform.
-
Quantitative synthesis of star shaped poly vinyl ether s with a narrow molecular weight distribution by living cationic polymerization
Journal of the American Chemical Society, 2006Co-Authors: Takaho Shibata, Shokyoku Kanaoka, Sadahito AoshimaAbstract:Star-shaped poly(vinyl ether)s with narrow molecular weight distributions were obtained from polymer-linking reactions of living polymers with a divinyl compound based on living cationic polymerization. For example, living polymers (DPn = 50−300) of isobutyl vinyl ether (IBVE), prepared with a cationogen/EtAlCl2 at 0 °C in hexane in the presence of ethyl acetate, were allowed to react with a small amount of 1,4-cyclohexanedimethanol divinyl ether (DVE-1) to give a star-shaped poly(IBVE) in Quantitative Yield (100%). In addition, a notable feature of this star-shaped polymer was extremely narrow molecular weight distribution (Mw/Mn = 1.1−1.2). The structure of divinyl compounds and reaction conditions for the linking reaction are key factors for achieving Quantitative Yield of star-shaped polymers. To our best knowledge, this is the first example of selective preparation of star-shaped polymers with narrow molecular weight distribution via one-pot polymer-linking reactions, which has never been achieved in...
-
Quantitative synthesis of star shaped poly vinyl ether s with a narrow molecular weight distribution by living cationic polymerization
Journal of the American Chemical Society, 2006Co-Authors: Takaho Shibata, Shokyoku Kanaoka, Sadahito AoshimaAbstract:Star-shaped poly(vinyl ether)s with narrow molecular weight distributions were obtained from polymer-linking reactions of living polymers with a divinyl compound based on living cationic polymerization. For example, living polymers (DPn = 50−300) of isobutyl vinyl ether (IBVE), prepared with a cationogen/EtAlCl2 at 0 °C in hexane in the presence of ethyl acetate, were allowed to react with a small amount of 1,4-cyclohexanedimethanol divinyl ether (DVE-1) to give a star-shaped poly(IBVE) in Quantitative Yield (100%). In addition, a notable feature of this star-shaped polymer was extremely narrow molecular weight distribution (Mw/Mn = 1.1−1.2). The structure of divinyl compounds and reaction conditions for the linking reaction are key factors for achieving Quantitative Yield of star-shaped polymers. To our best knowledge, this is the first example of selective preparation of star-shaped polymers with narrow molecular weight distribution via one-pot polymer-linking reactions, which has never been achieved in...
Sukbok Chang - One of the best experts on this subject based on the ideXlab platform.
-
a highly efficient synthesis of s n boc coniine using ring closing olefin metathesis rcm
Tetrahedron Letters, 1999Co-Authors: Sukbok ChangAbstract:Optically active (S)-(+)-coniine as an N-Boc protected form was concisely prepared starting from an amino acid, l-norvaline. The key step involved a ring-closing olefin metathesis (RCM) of the dialkenyl compound 6 to give the corresponding cyclic olefin 8 in an essentially Quantitative Yield.
Davide Fabbri - One of the best experts on this subject based on the ideXlab platform.
-
ring closing olefin metathesis of 2 2 divinylbiphenyls a novel and general approach to phenanthrenes
Organic Letters, 2004Co-Authors: Anna Iuliano, Paolo Piccioli, Davide FabbriAbstract:The ring-closing olefin metathesis (RCM) of 2,2‘-divinylbiphenyls, using a second-generation RCM ruthenium-based catalyst, leads to differently substituted phenanthrenes in Quantitative Yield under very mild reaction conditions, independent of both nature and position of the groups present on the biphenyl moiety.