The Experts below are selected from a list of 267 Experts worldwide ranked by ideXlab platform
Takayuki Otsu - One of the best experts on this subject based on the ideXlab platform.
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Radical copolymerization of Citraconic Anhydride with styrene and terpolymerization of Citraconic Anhydride and maleic Anhydride with styrene
Macromolecules, 1992Co-Authors: Jian Zhong Yang, Takayuki OtsuAbstract:Existence of a 1:1 charge transfer complexe between Citraconic Anhydride (CAn) and styrene (St) in the copolymerization system was confirmed. The penultimate model was shown to be the relatively adequate description of the mechanism of the copolymerization of CAn with St. The relative reactivity of maleic Anhydride toward a poly(St) radical was found to be about 6.8 times higher than that of CAn. The alternating copolymer of dialkyl citraconate with St having a relatively high thermal stability was prepared by esterification of the St-CAn copolymer.
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Terpolymerization behaviour of Citraconic Anhydride, styrene, and isobutyl vinyl ether
Polymer Bulletin, 1991Co-Authors: Jian Zhong Yang, Takayuki OtsuAbstract:Radical terpolymerizations of Citraconic Anhydride (CAn), styrene (St), and isobutyl vinyl ether (IBVE) have been investigated in benzene at 60°C. St monomer shows higher reactivity toward a poly(CAn) radical compared with IBVE. The complex of St-CAn is observed to be also more reactive than the CAn- IBVE complex.
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Reactivities of Citraconic Anhydride, N-alkylcitraconimides, dialkyl citraconates and dialkyl mesaconates in radical copolymerization with vinyl acetate and characterization of the resulting copolymers
European Polymer Journal, 1991Co-Authors: Jian Zhong Yang, Takayuki OtsuAbstract:Abstract Radical copolymerizations of Citraconic acid (CA) derivatives including Citraconic Anhydride (CAn), N-alkylcitraconimides (RCIs), dialkylcitraconates (DRCs) and dialkyl mesaconates (DRMs) with vinyl acetate (VAc) were performed in bulk at 60° with 0.02 mol·dm−3 of 2,2′-azobisisobutyronitrile. Alternating copolymers having molecular weights > 10,000 were obtained from the systems of CAn and DRMs with VAc. On the other hand, no alternating tendency was observed in the copolymerizations of RCIs and DRCs with VAc. The relative reactivities of these CA derivatives towards a polyvinyl acetate radical were found to decrease in the order; CAn > RCIs ⋍ DRMs > DRCs . The relative reactivities of DRCs were little influenced by their ester alkyl substituents. Thermogravimetric analyses of the resulting copolymers were also carried out.
Jian Zhong Yang - One of the best experts on this subject based on the ideXlab platform.
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Radical copolymerization of Citraconic Anhydride with styrene and terpolymerization of Citraconic Anhydride and maleic Anhydride with styrene
Macromolecules, 1992Co-Authors: Jian Zhong Yang, Takayuki OtsuAbstract:Existence of a 1:1 charge transfer complexe between Citraconic Anhydride (CAn) and styrene (St) in the copolymerization system was confirmed. The penultimate model was shown to be the relatively adequate description of the mechanism of the copolymerization of CAn with St. The relative reactivity of maleic Anhydride toward a poly(St) radical was found to be about 6.8 times higher than that of CAn. The alternating copolymer of dialkyl citraconate with St having a relatively high thermal stability was prepared by esterification of the St-CAn copolymer.
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Terpolymerization behaviour of Citraconic Anhydride, styrene, and isobutyl vinyl ether
Polymer Bulletin, 1991Co-Authors: Jian Zhong Yang, Takayuki OtsuAbstract:Radical terpolymerizations of Citraconic Anhydride (CAn), styrene (St), and isobutyl vinyl ether (IBVE) have been investigated in benzene at 60°C. St monomer shows higher reactivity toward a poly(CAn) radical compared with IBVE. The complex of St-CAn is observed to be also more reactive than the CAn- IBVE complex.
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Reactivities of Citraconic Anhydride, N-alkylcitraconimides, dialkyl citraconates and dialkyl mesaconates in radical copolymerization with vinyl acetate and characterization of the resulting copolymers
European Polymer Journal, 1991Co-Authors: Jian Zhong Yang, Takayuki OtsuAbstract:Abstract Radical copolymerizations of Citraconic acid (CA) derivatives including Citraconic Anhydride (CAn), N-alkylcitraconimides (RCIs), dialkylcitraconates (DRCs) and dialkyl mesaconates (DRMs) with vinyl acetate (VAc) were performed in bulk at 60° with 0.02 mol·dm−3 of 2,2′-azobisisobutyronitrile. Alternating copolymers having molecular weights > 10,000 were obtained from the systems of CAn and DRMs with VAc. On the other hand, no alternating tendency was observed in the copolymerizations of RCIs and DRCs with VAc. The relative reactivities of these CA derivatives towards a polyvinyl acetate radical were found to decrease in the order; CAn > RCIs ⋍ DRMs > DRCs . The relative reactivities of DRCs were little influenced by their ester alkyl substituents. Thermogravimetric analyses of the resulting copolymers were also carried out.
Victoria Vinader - One of the best experts on this subject based on the ideXlab platform.
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A new route to tricyclane sesquiterpenoids: total synthesis of α-ekasantalic acid.
Organic & biomolecular chemistry, 2019Co-Authors: L Lomba, Kamyar Afarinkia, Victoria VinaderAbstract:Chemical manipulation of the cycloadduct of Citraconic Anhydride and cyclopentadiene enables a new synthetic route to tricyclane sesquiterpenoids. This methodology is applied to the first total synthesis of α-ekasantalic acid.
Moirangthem Dhaneshwar Singh - One of the best experts on this subject based on the ideXlab platform.
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Highly Regioselective Diels–Alder Reaction of 9-Substituted Anthracenes with Citraconic Anhydride
Synlett, 2014Co-Authors: Ruhima Khan, Thokchom Prasanta Singh, Moirangthem Dhaneshwar SinghAbstract:The regioselectivity in the Diels–Alder reaction of 9-substituted anthracenes having electron-releasing substituents with Citraconic Anhydride has been investigated. The ortho regioisomer is preferred in all the cases with good yield. The reaction proceeded best under conventional heating conditions in toluene.
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highly regioselective diels alder reaction of 9 substituted anthracenes with Citraconic Anhydride
Synlett, 2014Co-Authors: Ruhima Khan, Thokchom Prasanta Singh, Moirangthem Dhaneshwar SinghAbstract:The regioselectivity in the Diels–Alder reaction of 9-substituted anthracenes having electron-releasing substituents with Citraconic Anhydride has been investigated. The ortho regioisomer is preferred in all the cases with good yield. The reaction proceeded best under conventional heating conditions in toluene.
L Lomba - One of the best experts on this subject based on the ideXlab platform.
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A new route to tricyclane sesquiterpenoids: total synthesis of α-ekasantalic acid.
Organic & biomolecular chemistry, 2019Co-Authors: L Lomba, Kamyar Afarinkia, Victoria VinaderAbstract:Chemical manipulation of the cycloadduct of Citraconic Anhydride and cyclopentadiene enables a new synthetic route to tricyclane sesquiterpenoids. This methodology is applied to the first total synthesis of α-ekasantalic acid.