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11: Reacciones de adición nucleofílica de carbonilo

  • Page ID
    2389
  • Carbonyl functional groups fall into two basic categories: carboxylic acid derivatives and ketones/aldehydes. In carboxylic acid derivatives - a group which includes amides, esters, thioesters, and acyl phosphates in addition to carboxylic acids - the carbonyl carbon is bonded on one side to a carbon and on the other side to a heteroatom (nitrogen, oxygen, or sulfur). When the neighboring atoms are both carbons or hydrogens, the group is referred to as a ketone (if both atoms are carbons) or an aldehyde (if one or both atoms is a hydrogen). In carboxylic acid derivatives, the heteroatom bonded to the carbonyl carbon on one side is a potential leaving group, whereas in aldehydes and ketones the hydrogen and/or carbon is definitely not a good leaving group, so the two categories of compounds react in fundamentally different ways. In this chapter we will learn about how aldehydes and ketones react, then in the following chapter we will focus on the chemistry of carboxylic acid derivatives.