Shershnev, Ivan published the artcileThe use of α-diazo-γ-butyrolactone in the Buchner-Curtius-Schlotterbeck reaction of cyclic ketones: A facile entry into spirocyclic scaffolds, Related Products of esters-buliding-blocks, the publication is Tetrahedron Letters (2019), 60(27), 1800-1802, database is CAplus.
The first example of the Buchner-Curtius-Schlotterbeck reaction of cyclic ketones with a stabilized cyclic diazo compound partner is described. The approach towards spirocyclic scaffolds has been exemplified with readily available α-diazo-γ-butyrolactone. The reaction proved to be viable with BF3·OEt2 as the preferred catalyst and displayed substantial sensitivity to the size of the cyclic ketone.
Tetrahedron 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 C5H6BNO2, Related Products of esters-buliding-blocks.
Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics