| abstract |
An asymmetric spiroorthocarbonate compound having one exomethylene group and represented by the following general formula (1) (* CHEMICAL STRUCTURE *) (1) wherein A represents a group selected from the group consisting of: (* CHEMICAL STRUCTURE *) (* CHEMICAL STRUCTURE *) wherein R1, R2, R3 and R4 each represents a hydrogen atom, a lower alkyl group having not more than 8 carbon atoms, an alkoxy group, a halogen group, a nitro group, a cyano group, an amino group, an amide group, a hydroxyl group or an alkyl ester group having not more than 20 carbon atoms; and R5, R6, R7 and R8, R9 through R14, R15 through R22, R23 through R28 and R29 through R36 each represents a hydrogen atom or a lower alkyl group having not more than 8 carbon atoms; and copolymers containing units therefrom. |