Silver-Catalyzed Decarboxylative Alkynylation of Aliphatic Carboxylic Acids in Aqueous Solution
作者:Xuesong Liu、Zhentao Wang、Xiaomin Cheng、Chaozhong Li
DOI:10.1021/ja306638s
日期:2012.9.5
C(sp(3))-C(sp) bondformations are of immense interest in chemistry and material sciences. We report herein a convenient, radical-mediated and catalytic method for C(sp(3))-C(sp) cross-coupling. Thus, with AgNO(3) as the catalyst and K(2)S(2)O(8) as the oxidant, various aliphatic carboxylic acids underwent decarboxylative alkynylation with commercially available ethynylbenziodoxolones in aqueous solution
[EN] PROCESS FOR THE PRODUCTION OF 4-ALKANOYLOXY-2-METHYLBUTANOIC ACID<br/>[FR] PROCÉDÉ POUR LA PRODUCTION D'ACIDE 4-ALCANOYLOXY-2-MÉTHYLBUTANOÏQUE
申请人:DSM IP ASSETS BV
公开号:WO2013182607A1
公开(公告)日:2013-12-12
The present invention relates to an improved process for the production of 4- alkanoyloxy-2-methylbutanoic acid, as well as to the use of such compounds in organic syntheses, especially in processes forming intermediates (building blocks) for the synthesis of organic compounds comprising isoprene (isoterpene) units, such as β-carotene or other carotenoids (e.g. canthaxanthin, zeaxanthin or astaxanthin) or as vitamin E or vitamin A as well as other structurally similar compounds.
In one aspect, the present invention provides a composition of a covalent conjugate of a GABA analog with a drug. In another aspect, the present invention provides methods for treating pain and neurological disorders using the conjugates of GABA analogs.