Pd/Cu-cocatalyzed reigoselective arylation of thiazole derivatives at 2-position under ligand-free conditions
作者:Jian Gu、Chun Cai
DOI:10.1039/c5ra08703a
日期:——
regioselective arylation of thiazole derivatives at the 2-position via palladium- and copper-catalyzed C–H bond activation underligand-freeconditions has been developed. The reaction proceeds smoothly with 1% palladium catalyst in the presence of 20% Cu(TFA)2 to furnish the desired products. The direct C–H arylation and no ligand made this method synthetically useful for the arylation of thiazoles
Strukturchemische Untersuchungen XII. Über Thiazolderivate aus dem Dithio-amid der Benzol-1, 4-dicarbonsäure
作者:H. Erlenmeyer、W. Büchler、H. Lehr
DOI:10.1002/hlca.194402701123
日期:——
No abstract is available for this article.
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Process for production of vinyl chloride polymer
申请人:Shin-Etsu Chemical Co., Ltd.
公开号:EP0172427A2
公开(公告)日:1986-02-26
This process is a process for production of a vinyl chloride polymer by suspension polymerization or emulsion polymerization of vinyl chloride monomer or a mixture of vinyl chloride monomer with a vinyl monomer copolymerizable with said vinyl chloride monomer in an aqueous medium, characterized in that the polymerization is carried out in a polymerizer, the inner wall surface and portions of the auxiliary equipment thereof which may come into contact with the monomer during polymerization being previously coated with a scaling preventive comprising at least one selected from dyes, pigments and aromatic or heterocyclic compounds having at least 5 conjugated π bonds, while controlling the chloride ion concentration in the reaction mixture to not higher than 100 ppm. According to said process, scaling onto the inner wall surface of a polymerizer, etc. during polymerization can be prevented effectively and surely.