Biarylphosphonite Gold(I) Complexes as Superior Catalysts for Oxidative Cyclization of Propynyl Arenes into Indan-2-ones
作者:Guilhem Henrion、Thomas E. J. Chavas、Xavier Le Goff、Fabien Gagosz
DOI:10.1002/anie.201301015
日期:2013.6.10
Striking gold: A series of variously functionalized propynyl arenes was smoothly converted into indan‐2‐ones by a new gold(I)‐catalyzed oxidative cyclization process. [LAu]NTf2 (Tf=trifluoromethanesulfonyl) is a superior catalyst both in terms of yield and kinetics for the present transformation.
打击金:通过新的金(I)催化的氧化环化工艺,一系列功能化的丙炔基芳烃被顺利转化为茚满-2-酮。就本转化而言,就收率和动力学而言,[ L Au] NTf 2(Tf =三氟甲磺酰基)是优良的催化剂。
Enantioselective Rhodium-Catalyzed [4+2+2] Cycloaddition of Dienyl Isocyanates for the Synthesis of Bicyclic Azocine Rings
作者:Robert T. Yu、Rebecca Keller Friedman、Tomislav Rovis
DOI:10.1021/ja906641d
日期:2009.9.23
A highly enantioselectiverhodium-catalyzed [4+2+2] cycloaddition of terminal alkynes and dienyl isocyanates has been developed. The cycloaddition provides a rapid entry to highly functionalized and enantioenriched bicyclic azocines. This reaction represents the first [4+2+2] cycloaddition strategy to construct nitrogen-containing eight-membered rings.
Preparation of Substituted Enol Derivatives From Terminal Alkynes and Their Synthetic Utility
作者:John R. DeBergh、Kathleen M. Spivey、Joseph M. Ready
DOI:10.1021/ja803480b
日期:2008.6.1
trapping with carboxylic anydrides or silyl triflates yields trisubstituted enol esters or silanes, respectively. The tandem carbometalation/oxygenation tolerates free and protected alcohols, heterocycles, olefins, and nitriles. Stereodefined enol esters can undergo asymmetric dihydroxylation to yield optically active alpha-hydroxy aldehydes. Reduction with NaBH4 provides the diols of 1,1-disubstituted olefins
醛的立体定义的烯醇衍生物由末端炔烃制备。具体而言,已知末端炔烃会经历 Cp2ZrCl2 催化的甲基铝化。在这里,我们表明所得的乙烯丙烷可以用过氧锌物质氧化以生成三取代的烯醇化物。用羧酸酐或甲硅烷基三氟甲磺酸酯进行亲电捕获分别产生三取代的烯醇酯或硅烷。串联碳金属化/氧化耐受游离和受保护的醇、杂环、烯烃和腈。立体定义的烯醇酯可以进行不对称二羟基化以产生光学活性的 α-羟基醛。用 NaBH4 还原以优异的 ee 提供 1,1-二取代烯烃的二醇。介绍了这种方法在昆虫信息素额蛋白的对映选择性合成中的应用。最后,显示 α-羟基醛经过同系化到末端炔、还原胺化、氧化和烯化。初步结果表明串联碳金属化/胺化可以用偶氮二羧酸盐完成。以这种方式,以极好的收率形成烯-肼。
Tricyclic pyrazole kinase inhibitors
申请人:Arnold D. Lee
公开号:US20060014816A1
公开(公告)日:2006-01-19
Compounds of the present invention are useful for inhibiting protein tyrosine kinases. Also disclosed are methods of making the compounds, compositions containing the compounds, and methods of treatment using the compounds.
The present invention relates to a method of combating pest, which method comprises contacting said pest or their food supply, habitat, breeding ground or their locus with a 3-pyridyl compound of the formula (I). In formula (I) n is 1 or 2, y is 0 or 1 and X, R
1
, R
2
, R
3
, R
4
, R
5
and R
6
are as defined in the claims and in the specification. The invention also relates to novel 3-pyridyl compounds which are useful for combating animal pests, in particular insects and to pesticidal composition, which comprises at least one 3-pyridyl compound and an agriculturally acceptable carrier.