chiral reagent造句

• At room temperature, most 1, 2-disubstituted cyclohexanes undergo rapid ring flipping ( exceptions being rings with bulky substituents ), and as a result, the two cis stereoisomers behave chemically identically with chiral reagents.
• An "'enantioselective "'reaction is one in which one enantiomer is formed in preference to the other, in a reaction that creates an optically active product from an achiral starting material, using either a chiral catalyst, an enzyme or a chiral reagent.
• An important variant is kinetic resolution, in which a pre-existing chiral center undergoes reaction with a chiral catalyst, an enzyme or a chiral reagent such that one enantiomer reacts faster than the other and leaves behind the less reactive enantiomer, or in which a pre-existing chiral center influences the reactivity of a reaction center elsewhere in the same molecule.