2,2-Diphenyl-4-methylene-1,3-dioxolane

Of the 4-methylene-1,3-dioxolanes reported thus far (Table 4.6), only the 2,2-diphenyl derivative (50) is reported to give the polyketone quantitatively (Scheme 4.32). This requires temperatures in excess of 120 °C in bulk polymerization."... 

A very special type of template polymerization was presented by a group of Japanese scientists. The method used was based on the observation that during radical polymerization of 2,2-diphenyl-4-methylene-l,3-dioxolane, elimination of benzophe-none occurs according to reaction ... 

Bis[( + )-[(2,2-dimethyl-l,3-dioxolane-4,5-diyl)bis(methylene)]bis[diphenyl-phosphine]]hydridorhodium(l)... 

Sugiyama and co-workers (69,70) report a very interesting template process by the ring-opening polymerization induced by radicals. The polyethylene template was connected with 2,2-diphenyl-4-methylene-l,3-dioxolane groups by the covalent bonds. The process can be illustrated by the following reaction ... 

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