ullman reaction造句

例句與造句

1. Using an oxazoline auxiliary group provides steric effect which influences the high diastereoselectivity of asymmetric Ullman reaction.
2. Electronegative groups in the ortho position of the aryl halogen are known to be strongly activated toward Ullman reaction.
3. Modern variants of the Ullman reaction employing palladium and nickel have widened the substrate scope of the reaction and rendered reaction conditions more mild.
4. There are two types of Ullman reaction : Classic ( Copper catalyzed synthesis of symmetric biaryl compounds ) and Ullman type ( copper catalyzed nucleophilic aromatic substitution ).
5. It's difficult to find ullman reaction in a sentence. 用ullman reaction造句挺難的