N-benzyl indol-3-yl butanoic acid derivatives as cyclooxygenase
申请人:Merck Frosst Canada, Inc.
公开号:US05639780A1
公开(公告)日:1997-06-17
The invention encompasses the novel compound of Formula I useful in the treatment of cyclooxygenase-2 mediated diseases. ##STR1## The invention also encompasses certain pharmaceutical compositions for treatment of cyclooxygenase-2 mediated diseases comprising compounds of Formula I.
Regioselective C−H Alkylation via Carboxylate‐Directed Hydroarylation in Water
作者:Guodong Zhang、Fan Jia、Lukas J. Gooßen
DOI:10.1002/chem.201800757
日期:2018.3.26
afford the corresponding 2‐alkylbenzoic acids in moderate to excellent yields. This C−H alkylation process is generally applicable to diversely substituted electron‐rich and electron‐deficient benzoic acids, along with α,β‐unsaturated olefins including unprotected acrylic acid. The widely available carboxylate directing group can be removed or utilized for further derivatization. Mechanistic investigations
在催化性[RuCl 2(p- cym)] 2的存在下,以Li 3 PO 4为碱,苯甲酸与水中的烯烃反应,以中等至极好的收率得到相应的2-烷基苯甲酸。这种CH烷基化过程通常适用于各种取代的富电子和缺电子的苯甲酸,以及包括未保护丙烯酸的α,β-不饱和烯烃。广泛使用的羧酸酯导向基团可以被除去或用于进一步的衍生化。机理研究表明,转化是通过钌循环中间体进行的。
Oxidation of 2-Substituted Cycloalkanones with Cerium(IV) Sulfate Tetrahydrate in Alcohols and Acetic Acid
作者:Liangyou He、C. Akira Horiuchi
DOI:10.1246/bcsj.72.2515
日期:1999.11
The reaction of 2-substituted cycloalkanones with cerium(IV) sulfate tetrahydrate (CS) in alcohols and acetic acid gave the corresponding alkyl esters of oxo acids (80—96%) and oxo acids (78—96%), respectively, by oxidative cleavage of the C(R)–C=O bond. In the case of 2-iodocycloalkanones in methanol, the dimethyl ester was obtained in good yield. A treatment of 5α-cholestan-3-one with CS in methanol
Copper Catalyzed Defluoroarylation of <i>gem</i>-Difluoroallenes to Allenyl Monofluorides with Aryl Boronic Esters
作者:Yiming You、Jiawen Hu、Tao Wu
DOI:10.1021/acs.orglett.3c01583
日期:2023.6.23
studies have been performed on allenyl monofluorides, especially on aryl-substituted frames, due to concerns about their stability. Here we report a copper-catalyzed regioselective synthesis of such structures with inexpensive and accessible arylboronicesters under mild conditions. Arylated allenyl monofluorides were stable enough to be isolated and easily converted to various other fluorine-containing