Wang, Mengdan published the artcileSequential C-C σ-Bond Cleavage/(sp2) C-O Bond Formation via C-H Functionalization toward Pyranoindolones Fused with Medium-Sized Rings, Recommanded Product: 3-Acetyldihydrofuran-2(3H)-one, the publication is Organic Letters (2018), 20(19), 6130-6134, database is CAplus and MEDLINE.
An atom-economical procedure for the synthesis of pyranoindolones fused with 7- or 8-membered rings has been developed. This process is realized through the sequential Cs2CO3-promoted C-C σ-bond cleavage of cyclic ketoesters and a ZnI2-mediated selective C-H/O-H coupling reaction. Two of the C-C σ-bonds are cleaved and one of the sp2 C-H bonds is functionalized during the reaction process. Easily accessible starting materials and broad substrate scope make this protocol attractive in synthetic organic chem.
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 C10H9NO4S, Recommanded Product: 3-Acetyldihydrofuran-2(3H)-one.
Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics