Effect of heat on amino acids
α-Amino acids on heating → diketopiperazine
β-Amino acids on heating → α,β-unsaturated acids
γ-Amino acids on heating → lactam
δ-Amino acids on heating → lactam
(α-Amino acids on heating give diketopiperazine (cyclic diamide
![](https://ask-chemistry.com/?qa=blob&qa_blobid=8258755657116438080)
β-Amino acids on heating give α,β-unsaturated acids
![](https://ask-chemistry.com/?qa=blob&qa_blobid=17016843069936264780)
(γ-Amino acids on heating give lactam (five-membered cyclic ester
![](https://ask-chemistry.com/?qa=blob&qa_blobid=9863570062491364229)
(δ-Amino acids on heating give lactam (six-membered cyclic ester
![](https://ask-chemistry.com/?qa=blob&qa_blobid=5309866796369593052)