METHOD OF PRODUCING α-CARBOXYLATED 5-MEMBERED LACTONESFive-membered lactones are α-carboxylated by reacting in solution the lactone with methyl methoxy-magnesium carbonate. The lactone reactants are restricted to those having an α-methylene group.Parker, William LJohnson, FrancisMartin, John...
METHOD OF PRODUCING {60 -CARBOXYLATED 5-MEMBERED LACTONESFive-membered lactones are alpha -carboxylated by reacting in solution the lactone with methyl methoxy-magnesium carbonate. The lactone reactants are restricted to those having an alpha -methylene group.WILLIAM L. PARKER...
Dyes having two 5-membered lactone rings fused to a central cyclohexa-1.4- diene nucleusA novel hetero-polycyclic compound of the following formula, a method for its preparation and its use in the coloration of textile materials: ##STR1## wherein, Z.sup.1 & Z.sup.2 are each ...
PURPOSE:To reaction between carbon monoxide, an acetylene and an olefin in the presence of a rhodium carbonyl and a specific organic phosphorus compound enables the selective formation of the titled compound which is used as a starting substance of medicines and agricultural chemicals, without ...
Dyes having two 5-membered lactone rings fused to a central cyclohexa-1.4- diene nucleusA novel hetero-polycyclic compound of the following formula, a method for its preparation and its use in the coloration of textile materials: ##STR1## wherein, Z.sup.1 & Z.sup.2 are each ...
Copolymerization of the functional 5-membered lactone monomer, α-bromo-γ-butyrolactone (αBrγBL), with TMC, AOMEC and εCL.Copolymers with low dispersities (M) were obtained when using diphenyl phosphate (DPP) as a catalyst.Grafting of MA via Cu(0)-mediated CRP on the copolymers ...
PURPOSE:To reaction between carbon monoxide, an acetylene and an olefin in the presence of a rhodium carbonyl and a specific organic phosphorus compound enables the selective formation of the titled compound which is used as a starting substance of medicines and agricultural chemicals, without ...
The present invention provides α-hydroxy benzeneacetic acid derivatives of the formula as defined in the specification which is a precursor indispensable for synthesis of compounds having two 5-membered lactone rings fused to central cyclohexa-1,4-diene nucleus, and a process of easily preparing the...
Stecko, SPasniczek, KJurczak, MUrbanczykLipkowska, ZChmielewski, M
It is a precursor essential for the synthesis of compounds having a five-membered ring lactone two rings fused to the central cyclohexa-1,4-diene core is represented by the formula as defined in the description of the invention, (伪 - It is intended to provide a method for preparing it ...