The present invention relates to a process for preparing dithioesters in which a dithiocarboxylic acid and/or a dithiocarboxylic salt is reacted with a vinyl compound and/or an alkyl compound which includes a leaving group, the reaction being carried out in a biphasic system in which one of the phases comprises water and the weight ratio of the aqueous phase to the organic phase lies in the range from 95:5 to 5:95.
METHOD FOR PRODUCING A CARBOXYLIC ACID AMIDE FROM A CARBONYL COMPOUND AND HYDROCYANIC ACID
申请人:May Alexander
公开号:US20110306784A1
公开(公告)日:2011-12-15
The invention relates to a method for producing a carboxylic acid amide from a carbonyl compound and hydrocyanic acid, comprising the steps of A) reacting a carbonyl compound with hydrocyanic acid to produce a hydroxycarboxylic acid nitrile, B) hydrolysis of the hydroxycarboxylic acid nitrile obtained in step A) in the presence of a catalyst comprising manganese dioxide, wherein a molar excess of carbonyl compound is used in relation to the hydrocyanic acid to react the carbonyl compound with hydrocyanic acid according to step A), and the reaction mixture obtained in step A) is not purified by distillation before the hydrolysis according to step B) is carried out. The invention furthermore relates to a method for producing alkyl(meth)acrylates from polymers, moulding compounds and moulded bodies, wherein a method for producing a carboxylic acid amide from a carbonyl compound and hydrocyanic acid is carried out in accordance with the method described above.
Reactions of HDDA-Derived Benzynes with Sulfides: Mechanism, Modes, and Three-Component Reactions
作者:Junhua Chen、Vignesh Palani、Thomas R. Hoye
DOI:10.1021/jacs.6b01025
日期:2016.4.6
We report here reactions of alkyl sulfides with benzynes thermally generated by the hexadehydro-Diels-Alder (HDDA) cycloisomerization. The initially produced 1,3-betaine (o-sulfonium/aryl carbanion) undergoes intramolecular proton transfer to generate a more stable S-aryl sulfur ylide. This can react in various manners, including engaging weak acids (HA) in the reaction medium. This can produce transient
[EN] CH-ACIDIC METHACRYLIC ESTERS FOR THE PREPARATION OF AQUEOUS POLYMER DISPERSIONS<br/>[FR] ESTERS MÉTHACRYLIQUES CH-ACIDES POUR LA PRÉPARATION DE DISPERSIONS POLYMÈRES AQUEUSES
申请人:EVONIK OPERATIONS GMBH
公开号:WO2020016037A1
公开(公告)日:2020-01-23
The present invention relates to CH-acidic methacrylic esters and also copolymers obtainable from CH-acidic methacrylic esters. Furthermore, the present invention relates to coating compositions comprising these copolymers.
[EN] NOVEL 17ß LUPANE DERIVATIVES<br/>[FR] NOUVEAUX DÉRIVÉS DE 17SS-LUPANE
申请人:VIROCHEM PHARMA INC
公开号:WO2009100532A1
公开(公告)日:2009-08-20
The invention relates to 17ß lupane derivatives of formula (I): wherein R1 and X are as defined herein, and pharmaceutically acceptable salts and solvates thereof. These compounds exhibit significant anti-HIV activity. Thus, the invention also relates to methods for prevention or treatment of HIV infection by administering therapeutically effective amounts of a compound of formula (I), or a pharmaceutically acceptable salt or solvate thereof to a subject in need of such treatment.