Wannenmacher, Nick published the artcileDiastereospecific Enantiodivergent Allylation of Pyrazolones as an Entry to β-Aminoamides, Category: esters-buliding-blocks, the publication is Advanced Synthesis & Catalysis, database is CAplus.
A diastereospecific enantiodivergent allylation of pyrazolones I (R1 = n-Pr, H2C:CHCH2, PhCH2, etc.; R2 = Me, i-Pr, Ph; R3 = Ph, PhCH2, 4-MeOC6H4) with allyl imidates R4CH:CHCH2OC(:NH)CCl3 (R4 = Me, n-Pr, PhCH2CH2, MeO2CCH2CH2, PhCH2OCH2CH2), catalyzed by a planar chiral pentaphenylferrocene-based palladacycle, is reported. With the same catalyst, both enantiomeric products II were selectively available from (E)- or (Z)-allyl imidates. The method is applicable to structurally diverse substrates and gave products II with 85-94% enantiomeric excesses. In addition, pyrazolone (S,E)-II (R1 = 4-FC6H4CH2; R2 = Me; R3 = Ph; R4 = PhCH2CH2) was transformed into acyclic β-aminoamide.
Advanced Synthesis & Catalysis 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 C13H18BNO3, Category: esters-buliding-blocks.
Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics