| 摘要 |
There is provided a process for preparing a compound of the formula <IMAGE> wherein X1, X2, X3, and X4 are independently selected from the group consisting of fluorine, chlorine, bromine and iodine; n is an integer of from 1 to about 100; a, b, c, and d are each integers of from about 0 to about 4; Z1 and Z2 are independently selected from the group consisting of halogen and alkyl of from about 1 to about 15 carbon atoms; R1 and R2 are independently selected from the group consisting of alkylene containing from about 1 to about 12 carbon atoms, alkylenyl containing from about 2 to about 12 carbon atoms, cycloalkylene of the formula <IMAGE> wherein R3, R4 and R5 are independently selected from the group consisting of alkylene of from about 1 to about 5 carbon atoms, and cycloalkylenyl of the formula <IMAGE> and A is selected from the group consisting of R3CR4, <IMAGE> and O; comprising the steps of: (a) reacting a halogenated diphenoxy compound of the formula <IMAGE>
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