| 摘要 |
A process is provided for preparing homopolyanhydrides or regularly alternating copolyanhydrides by condensing a bis(trimethylsilyl) ester of a dicarboxylic acid, e.g., an alkylenedicarboxylic acid such as sebacic acid or a bis(p-carboxyphenoxy)alkane such as 1,3-bis(p-carboxyphenoxy)propane, with a dicarboxylic acid chloride, e.g., an alkylenedicarboxylic acid chloride such as sebacoyl chloride or a phenylenedicarboxylic acid chloride such as terephthaloyl chloride or isophthaloyl chloride, to yield the polyanhydride and chlorotrimethylsilane as a by-product. The process may be carried out in the presence of a condensation catalyst, e.g., a highly ionized organic or inorganic fluoride, such as tetrabutylammonium fluoride.
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