A novel organosilicon compound is provided as an organosilicon compound containing a 尾-ketoester structure that has minimal volatile components and generates a minimal amount of alcohol when used as a component within all manner of treatment agents. The organopolysiloxane is represented by an average...
A Beta-Ketoester is defined as an easily accessible compound that undergoes selenocyclization to form a mixture of cis-trans products, which can be further converted into selenium-free hydroxy furans. AI generated definition based on:Tetrahedron,2001 ...
Activated intermediate 21 was formed by keto–enol tautomerisation via intermediates 19 and 20. Final transesterification by the alcohol component gave the corresponding final β-amino acid ester and released the carbene catalyst (Scheme 17). Sign in to download full-size image Scheme 17. Three-...
PURPOSE: To obtain a new α,β-unsaturated ketoester derivative useful as an intermediate for producing, under mild conditions in a short process, a 2,4- dihydroxypyridine derivative as an inhibitor of an in vivo decomposing enzyme of 5-fluorouracyl which is an anti-malignant tumor...
Ruthenocene-Containing β-Diketones: Synthesis, pKa′ Values, Keto–Enol Isomerization Kinetics, and Electrochemical Aspects Claisen condensation of acetyl ruthenocene with the appropriate methyl ester, RCOOMe, under the influence of the hindered base lithium diisopropylamide gav... KC Kemp,E Fourie...
1. A process for the preparation of a beta -keto ester acetal by means of acetalization of a beta -keto ester with alkyl glycol, characterized in that the acetalization is carried out in the presence of an acid catalyst selected among the group comprised of acid forms of zeolites, zeotype...
The enones (I) are coupled with the ketene silyl acetals (II) in the presence of the trityl salts (III) to yield the δ-keto ester derivatives (V). T Mukaiyama,M Tamura,S Kobayashi - 《Cheminform》 被引量: 19发表: 1987年 “β-cis-SAr effect” on decarbonylation from α,β-unsatur...
3alpha-Hydroxy-7-oxo-5beta-cholanic Acid structure CAS No. 4651-67-6 Chemical Name: 3alpha-Hydroxy-7-oxo-5beta-cholanic Acid Synonyms 7-KETOLITHOCHOLIC ACID;Nutriacholic acid;7-Oxolithocholic acid;3α-Hydroxy-7-oxo-5β-cholan-24-oic acid;3α-Hydroxy-7-ketocholanic acid;Chenodeoxycholic...
A Beta-Lactone Ring is a strained ring structure found in natural products and biologically active compounds, known for its antibacterial and pharmacological properties, including covalent modification of enzymes and applications in treating obesity, diabetes, and cancer. ...
Allyl-Grignard addition, using an appropriate allyl-Grignard reagent, such as allyl-magnesium bromide at low temperature, such as 0° C., in a suitable ethereal solvent, such as THF, to the aforementioned coumarin 2, from scheme J, in a 1,4 sense provides the β-keto ester 19. ...