BETA-KETOESTERPROBLEM TO BE SOLVED: To obtain the subject new compound having excellent transportation/ preservation stability, useful as a precursor capable of simultaneously or continuously supplying various active compounds, especially a precursor for flavor and an antimicrobial compound, by introducing ...
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 ...
Cpds. of formula (I) are claimed R1 = H, 1-8C alkyl, 5-7C cycloalkyl or Ph; R2 = 1-8C alkyl, 5-7C cycloalkyl or Ph; R3 = 1-18C alkyl, O- or S-interrupted 2-18C alkyl, 5-7C cycloalkyl or Ph-(1-40C alkyl). (I) are produced by Claisen condensn. of esters of ...
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...
摘要: PURPOSE: To produce an aliphatic β-keto ester having the steric hindrance in a high yield by using an inexpensive metallic alcoholate as a condensing agent.收藏 引用 批量引用 报错 分享 文库来源 求助全文 PRODUCTION OF ALIPHATIC BETA-KETO ESTER 优质文献 ...
Kind Code: A1 Abstract: Cpds. of formula (I) are claimed R1 = H, 1-8C alkyl, 5-7C cycloalkyl or Ph; R2 = 1-8C alkyl, 5-7C cycloalkyl or Ph; R3 = 1-18C alkyl, O- or S-interrupted 2-18C alkyl, 5-7C cycloalkyl or Ph-(1-40C alkyl). (I) are produced by Claisen ...
cosmetic use of diorganopolysiloxanes beta keto ester functions, corresponding to the formula: in which: - the groups r, identical or different, denote, independently of one another, a c1-c4 alkyl group, a propyl 3 - 3,3,3 -, vinyl, phenyl, at least 80% in number of groups r are ...
ChemInform Abstract: A CONVENIENT METHOD FOR THE SYNTHESIS OF DELTA-ALKOXY-BETA-KETOESTER, THE TITANIUM TETRACHLORIDE-ACTIVATED REACTION OF DIKETENE WITH ACETALcarboxylic acid esters (benzene compoundscarboxylic acid esters (acyclic compoundsIn Gegenwart von TiCl 4 und Alkoholen reagieren die Acetale ...
摘要: PURPOSE: To obtain the subject compound useful as a synthetic intermediate for yellow couplers in good yield in a short process by reacting a specific heterocyclic ring-substituted acetic ester compound with a specified acyl halide compound....
In the method for producing the methylene beta-ketoesters of the invention, a beta-ketoester is reacted with a source of formaldehyde in a modified Knoevenagel reaction optionally in the presence of an acidic or basic catalyst, and optionally in the presence of an acidic or non-acidic solvent...