以两种方式研究了作为反应中间体的(η6-芳烃)铬配合物的生成。尽管早期针对从各种三羰基(苯基三氟甲磺酸酯)铬配合物中消除三氟甲磺酸酯的尝试失败了,但人们考虑了更多富含电子的苯基三氟甲磺酸酯配合物。这是通过用芳烃配体中的两个甲氧基取代或用三苯基膦取代三羰基铬配合物的三个羰基配体之一来实现的。然而,企图消除仍然没有发生;尽管芳族配体中的电子密度增加,但在 –78 °C 下仍以高产率观察到阴离子硫杂-弗里斯重排。作为替代,测试了氟化锂的消除。三羰基(2-锂硫氟苯)铬(0)是通过锡/锂交换产生的。水解后得到主要产物三羰基(氟苯)铬,表明锂化步骤成功。二聚副产物为(苄基)三羰基铬的中间体提供了证据。
[EN] TYK2 INHIBITORS AND USES THEREOF<br/>[FR] INHIBITEURS DE TYK2 ET LEURS UTILISATIONS
申请人:NIMBUS LAKSHMI INC
公开号:WO2015131080A1
公开(公告)日:2015-09-03
The present invention provides compounds, compositions thereof, and methods of using the same for the inhibition of TYK2, and the treatment of TYK2-mediated disorders.
本发明提供了化合物、其组合物以及使用这些化合物抑制TYK2并治疗TYK2介导的疾病的方法。
Copper-catalyzed arylstannylation of arynes in a sequence
作者:Hideya Tanaka、Hitoshi Kuriki、Teruhiko Kubo、Itaru Osaka、Hiroto Yoshida
DOI:10.1039/c9cc02738f
日期:——
Copper-catalyzed arylstannylation of arynes has been developed. This transformation enables variously substituted ortho-stannylbiaryls and teraryls to be constructed straightforwardly. An electron-deficient tin center is the key, and thus the single or dual insertion of arynes into arylstannanes is precisely controllable by simply changing the equivalence of aryne precursors.
Thiostannylation of arynes with stannyl sulfides: synthesis and reaction of 2-(arylthio)arylstannanesElectronic supplementary information (ESI) available: experimental section. See http://www.rsc.org/suppdata/cc/b4/b405883f/
Arynes were found to insert into a sulfur-tin sigma-bond of stannyl sulfides to give a variety of 2-(arylthio)arylstannanes, whose carbon-tin bonds were applicable to further transformations.
Synchronous ArF and ArSn Bond Formation through Fluorostannylation of Arynes
作者:Hiroto Yoshida、Ryuma Yoshida、Ken Takaki
DOI:10.1002/anie.201302783
日期:2013.8.12
An aryneinsertion into the FSn bond of tributyltin fluoride leads to the synchronous formation of ArF and ArSn bonds to afford diverse 2‐fluoroarylstannanes straightforwardly. The formal total synthesis of flurbiprofen by using a fluorostannylation product is also reported.
Catalytic C−H Bond Stannylation: A New Regioselective Pathway to C−Sn Bonds via C−H Bond Functionalization
作者:Meghan E. Doster、Jillian A. Hatnean、Tamara Jeftic、Sunjay Modi、Samuel A. Johnson
DOI:10.1021/ja105588v
日期:2010.9.1
ubiquitous Stille coupling reaction utilizes Sn-C bonds and is of great utility to organic chemists. Unlike the B-C bonds used in the Miyaura-Suzuki coupling reaction, which are readily obtained via direct borylation of C-H bonds, routes to organotin compounds via direct C-H bond functionalization are lacking. Here we report that the nickel-catalyzed reaction of fluorinatedarenes and pyridines with vinyl