umpolung

基本解释

• n.极反转

同根派生

英汉例句

• In this article, the fundamental concept of umpolung and its role in organic synthesis are briefly discussed.
  本文主要论述极性转换的基本概念和它在有机合成中的作用。
• The performances of different catalysts in a variety of reactions are analyzed.The possible umpolung mechanisms of these catalysts are discussed.
  通过对不同类别及同类不同活性中心的催化剂的比较分析，简要概括了各种催化剂的优劣势，并对极性反转的有机过程进行了机理上的阐述。
• The various methods for the umpolung of carbonyl compounds (aldehydes and ketones), secondary amines and the most frequently used umpolung reagents are introduced.
  先介绍了羰基化合物(醛、酮)的极性转换的各种方法,然后谈到胺的极性转换方法和最常用的极性转换试剂。
• Keywords umpolung;organic synthesis;polar functionality;application;
  极性转换;有机合成;极性官能度;应用;