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Spiro orthocarbonate radical ring-opening

In contrast, radical polymerization of 2,3-benzo-7-methylene-l,4,6,9-tetraoxa-spiro[4.4]nona-2-ene (138) gave only a vinyl polymer (139) with no occurrence of ring-opening isomerization, even in the solution polymerization at 165 °C. [105] It appears that the propagating radical having a spiro orthocarbonate structure is too stable to liberate the corresponding carbonyl compound, phenylene carbonate. [Pg.43]

Figure 15. Radical ring-opening polymerization of spiro orthocarbonate derivatives bearing an exo-methylene group at a- (a) and P-position (b) of the... Figure 15. Radical ring-opening polymerization of spiro orthocarbonate derivatives bearing an exo-methylene group at a- (a) and P-position (b) of the...
Scheme 13 Photoinitiated radical ring-opening polymerization of spiro orthocarbonate 45. Scheme 13 Photoinitiated radical ring-opening polymerization of spiro orthocarbonate 45.
See other pages where Spiro orthocarbonate radical ring-opening is mentioned: [Pg.928]    [Pg.594]    [Pg.594]    [Pg.418]    [Pg.171]    [Pg.171]    [Pg.172]    [Pg.172]    [Pg.179]    [Pg.38]   
See also in sourсe #XX -- [ Pg.43 ]



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Orthocarbonate

Orthocarbonates

Radical ring-opening

Ring radical

Spiro orthocarbonate

Spiro orthocarbonates

Spiro rings

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