网页影响 1,2-和1,4-加成的因素 (1) 亲核试剂的碱性 Nucleophiles that are strong bases, such as RLi and LiAlH4, tend to form direct addition products,for the reaction is irrersible. Nucleophiles that are relatively weak bases, such as ¯CN, amines, thiols, and X¯, usually form conjugated addition products.