A single step synthetic protocol to access a small family of renewable diacetals was established. The resultant chiral diacetals are valuable building blocks in pharmaceuticals and materials science. To demonstrate their synthetic competence, isohexide-diacetals (2a–c) were subjected to acetal metathesis polymerization and the corresponding polymers (poly2a–c) were isolated as white solids with molecular weights in the range 3200–27 600 (g mol−1). The semi-crystalline polymers displayed glass transition temperatures between 38–65 °C and melting temperatures in the range 103–156 °C. The isohexide derived polyacetals are stable under practical washing and rinsing conditions but degrade in slightly acidic media.
建立了获取一小类可再生二
缩醛的一步合成方案。所得的手性二
缩醛是药物和材料科学中有价值的基础材料。为了证明其合成能力,对异己
缩醛-二
缩醛 (2a–c) 进行
缩醛复分解聚合,并分离出相应的聚合物 (poly2a–c),为
白色固体,分子量范围为 3200–27 600 (g mol−1) 。半结晶聚合物的
玻璃化转变温度为 38-65 °C,熔化温度为 103-156 °C。异己糖醇衍生的聚
缩醛在实际洗涤和漂洗条件下是稳定的,但在微酸性介质中会降解。