Methyl 3-oxo pentanoate as the reactant,some β-keto esters can be prepared by gas chromatography.

The research pr ogress of asymmetric hydrogenation of β-keto ester by metal chiral catalyst in recent years are reviewed.

A new electron-donating diphosphine (R)-MeO-P-Phos [(R)-2,2 ,6,6 -tetramethoxy-4,4 -bis[di- (4-methoxylphenyl)phosphino]-3,3 -bipyridine] has been synthesized and its application to the asymmetric hydrogenation of β-keto esters catalyzed by ruthenium complex was explored.

Synthesis β-ketoesters with the Reaction of Dimethyl Carbonate to Ketones Over Solid Base;

An effcient transesterification of β-ketoesters with ethyl 4-2[2-(phthalimido)ethoxy]acetoacetate and S-(+)-β-methoxy-phenylethanol as raw materials and boric acid as catalyst is described.

A mild method for preparation of 1,4-diketone via the intermolecular coupling of substituted aryl β-ketoesters by use of cerium ambmonium nitrate in CH3CN/H2O has been reported.

In this work we decribed a totally new method for the constructing of this structural unit by employing indirect electrolysis,namely,using KI and NaI as the indirect electrolyte,water as solvent and reagent,the γ-alkylation products of β-Ketoesters as the starting material.

[AIM]To study an improved process for the preparation of a Key Intermediate β-Keto ester of Huperzine A (6).

Liquid-phase synthesis of methyl 6-amino-5-cyano-4-aryl-2-methyl-4H-pyran-3-carboxylates was achieved using ionic liquid boundβ-keto esters and arylmethylidenemalononitriles.