A process of the present invention produces a hydroxylactone by subjecting an unsaturated carboxylic acid having a double bond not conjugated to a carboxyl group or an ester thereof to (i) a reaction with hydrogen peroxide in the presence of a metallic compound containing a metallic element selected from W, Mo, V and Mn or (ii) a reaction with a peroxide containing the metallic element to thereby yield a corresponding hydroxylactone having a hydroxyl group combined with one of carbon atoms constituting the double bond and being cyclized at the other carbon atom position. The metallic compound may be one selected from oxides, oxoacids and salts thereof. The unsaturated carboxylic acid includes, for example, &bgr;,&ggr;-unsaturated carboxylic acids, &ggr;,&dgr;-unsaturated carboxylic acids, and &dgr;,&egr;-unsaturated carboxylic acids. The process can produce hydroxylactones in high yields at low cost.
COPOLYMER OF OLEFIN AND UNSATURATED CARBOXYLIC ACID OR UNSATURATED CARBOXYLIC ACID DERIVATIVE
申请人:China Petroleum & Chemical Corporation
公开号:EP3702381A1
公开(公告)日:2020-09-02
The present invention provides a copolymer of an olefin and an unsaturated carboxylic acid or an unsaturated carboxylic acid derivative, said copolymer being a spherical and/or spherical-like polymer. The copolymer provided by the invention exhibits a good morphology and has good prospects in industrial use.
Spiro-sulfonamide derivatives as inhibitors of myeloid cell leukemia-1 (MCL-1) protein
申请人:Prelude Therapeutics Incorporated
公开号:US11130769B2
公开(公告)日:2021-09-28
The disclosure is directed to compounds of Formula I
Pharmaceutical compositions comprising compounds of Formula I as well as methods of their use and preparation, are also described.
本公开涉及式 I 的化合物
还描述了包含式 I 化合物的药物组合物及其使用和制备方法。
[EN] METHOD FOR PREPARING OLEFIN-POLAR MONOMER COPOLYMER<br/>[FR] PROCÉDÉ DE PRÉPARATION D'UN COPOLYMÈRE DE MONOMÈRE POLAIRE D'OLÉFINE<br/>[ZH] 用于制备烯烃-极性单体共聚物的方法
申请人:[en]CHINA PETROLEUM & CHEMICAL CORPORATION;[zh]中国石油化工股份有限公司