Generate a more complex version of this sentence Claisen rearrangement '' proceeds by heating allylic alcohols in the presence of'' N, N -'dimethylacetamide dimethyl acetal to form γ, δ - unsaturated amide.
Mesthi, versi sing luwih rumit saka ukara kasebut yaiku "pangaturan ulang Claisen '' diwiwiti saka alkohol alilik dadi γ, δ - amida sing ora jenuh, lan dikembangake dening Albert Eschenmoser ing taun 1964. "