Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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2-(Multimethoxy)phenyl-4-methylene-1,3-dioxolane: Ⅱ. Preparation and Cationic Polymerization of 2-(x,y,z- Trimethoxyphenyl)-4-methylene-1,3-dioxolane Derivatives

  • Published : 1999.10.20
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Abstract

2-(2,4,5-Trimethoxyphenyl)-4-methylene-1,3-dioxolane (1b), 2-(2,4,6-trimethoxyphenyl)-4-methylene-1,3-di-oxolane (2b), and 2-(3,4,5-trimethoxyphenyl)-4-methylene-1,3-dioxolane (3b) were prepared and polymerized with boron trifluoride. Boron trifluoride catalyzed reaction proceeded via mainly ring-opening polymerization and cyclization reaction to yield poly(keto ether) and 3(2H)-dihydrofuranone. The yields of polymer and cyclized product exhibited a dependency on the position of the methoxy substituents in the benzene ring of 2-phenyl-4-methylene-1,3-dioxolane derivatives. Electrophilic attack of methylene or oxygen atom on 4-meth-ylene-1,3-dioxolane ring were suggested for the polymerization and cyclization.

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