手性砌块 Chiral block： 指含有手性碳原子的一类结构简单的有机化合物。手性结构广泛存在于生物体内，在医药方面，不同立体手性分子在生物体内具有不同的生理和化学反应，从而导致不同的药理和毒理作用。因而，对手性药物砌块在设计、合成、纯化和结构鉴定等方面的系统研究，不仅对于手性产品合成新技术开发和应用具有很高的科学研究价值，而且对加快国内新药开发进程也具有很大的推动作用。
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