| 释义 |
- 1
化学 区域选择性 The syntheses were finished within short periods (20-36 min) with good to excellent chemical yields and regioselectivity that avoided tedious work-up isolations. 该反应具有反应时间短(20-36min),产率和区域选择性高,操作简单方便等优点,避免繁琐的分离过程。 化学选择性 Judging from the diversity-oriented synthesis (DOS), this method is flexible, which includs the advantages of high chemo- and regioselectivity and high bond-forming efficiency. 从多样性导向合成来看,该方法灵活,富有变换,具有高化学选择性,能显著提高键形成的效率。 区位选择性 位置选择性 The enzymatic performances of the imprinted polymers were evaluated by catalyzing the nitration reaction of toluene. The effect of type of solvent and functional monomers, as well as degree of cross-linking on the regioselectivity of nitration reaction, has been studied. 将分子印迹聚合物作为甲苯硝化反应体系的催化剂,探讨功能单体种类、致孔剂的种类、交联度以及反应温度等对甲苯硝化反应位置选择性的影响。
- 2
- 3
|