《Direct Catalytic Asymmetric Synthesis of Oxindole-Derived δ-Hydroxy-β-ketoesters by Aldol Reactions》 was written by Zhang, Dongxin; Chen, Yan; Cai, Hu; Yin, Lei; Zhong, Junchao; Man, Jingjing; Zhang, Qian-Feng; Bethi, Venkati; Tanaka, Fujie. HPLC of Formula: 609-14-3 And the article was included in Organic Letters in 2020. The article conveys some information:
Direct asym. synthesis of δ-hydroxy-β-ketoesters was accomplished via regio- and enantioselective aldol reactions of β-ketoesters with isatins catalyzed by cinchona alkaloid thiourea derivatives The C-C bond formation of the reactions occurred only at the γ-position of the β-ketoesters. Reaction progress monitoring and product stability analyses under the conditions that included the catalyst indicated that the γ-position reaction products were formed kinetically. Various δ-hydroxy-β-ketoesters bearing 3-alkyl-3-hydroxyoxindole cores relevant to the development of bioactive mols. were synthesized. In the experimental materials used by the author, we found Ethyl 2-methyl-3-oxobutanoate(cas: 609-14-3HPLC of Formula: 609-14-3)
Ethyl 2-methyl-3-oxobutanoate(cas: 609-14-3) belongs to ketone compounds. They are most widely used as solvents, especially in industries manufacturing explosives, lacquers, paints, and textiles. Ketones are also used in tanning, as preservatives, and in hydraulic fluids.HPLC of Formula: 609-14-3
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics