Cao, Shi-Xuan published the artcileMagnetic nanoparticles supported cinchona alkaloids for asymmetric Michael addition reaction of 1,3-dicarbonyls and maleimides, Category: esters-buliding-blocks, the publication is Chinese Chemical Letters (2018), 29(1), 201-204, database is CAplus.
Magnetic nanoparticles Fe3O4@SiO2 supported cinchona alkaloids (quinine and quinidine) were successfully synthesized as magnetically recoverable organocatalysts and characterized by FT-IR, XPS, SEM measurements, and elemental anal. Their catalytic activity and stereoselectivity were preliminarily evaluated in the asym. Michael addition reaction of 1,3-dicarbonyl compounds and maleimides to afford 3-(2-oxocyclopentyl)pyrrolidine-2,5-dione derivatives I [R = H, Me, Bn, etc.; R1 = C(O)Me, CO2Et, CO2Me], 3-[3-acetyl-2-oxo-tetrahydrofuran-3-yl]-1-benzyl-pyrrolidine-2,5-dione and ethyl-2-[1-benzyl-2,5-dioxo-pyrrolidin-3-yl]-3-oxo-butanoate. The supported quinine catalyst exhibited good catalytic efficiency and modest to high enantioselectivity. The magnetic recoverability and recyclability of the catalyst were also examined
Chinese Chemical 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, Category: esters-buliding-blocks.
Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics