I have a question about the definition of lactones. I am trying to classify a group of compounds based on their lactones.
In my dataset I have found the following lactones.
- α-methyl-γ-lactone (α,β-unsaturated lactone)
- and other types I am not sure about.
Going through literature, I also find the term “simple lactone” and I wonder what this is referring to? Everything without a methylene group, so just a methyl group or nothing else? Irrespective if it is unsaturated or not?
And my second question would be: what are natural derivatives of α-methylene-γ-lactones? If additional side chains are present on the lactone ring or the methylene groups is functionalized?