Kieslich, David published the artcileFormation of δ-Lactones by Cyanide Catalyzed Rearrangement of α-Hydroxy-β-oxoesters, Related Products of esters-buliding-blocks, the publication is Organic Letters (2021), 23(3), 953-957, database is CAplus and MEDLINE.
δ-Valerolactone derivatives such as I are formed by cyanide-catalyzed ring-transformation of cyclic α-hydroxy-β-oxoesters such as II (R = HO). This unprecedented reaction defines a new synthetic methodol., and the products are obtained in up to quant. yields. Several alkyl substitutions as well as different ester residues are tolerated. Furthermore, benzo- and heteroarene-annulated starting materials such as II (R = HO) are converted without difficulty. As an addnl. benefit, the starting materials are straightforwardly accessed by cerium-catalyzed aerobic α-hydroxylation of readily available β-oxoesters such as II (R = H).
Organic Letters published new progress about 517-23-7. 517-23-7 belongs to esters-buliding-blocks, auxiliary class Tetrahydrofuran,Ketone,Ester, name is 3-Acetyldihydrofuran-2(3H)-one, and the molecular formula is C6H8O3, Related Products of esters-buliding-blocks.
Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics