Palladium‐Catalyzed Enantioselective Alkenylation of Enelactams Using a Relay Heck Strategy
作者:Qianjia Yuan、Matthew S. Sigman
DOI:10.1002/chem.201902813
日期:2019.8.14
In this report, a palladium-catalyzed redox-relay Heck process to access optically active alkenylated α,β-unsaturated lactams is described. Under mildreaction conditions, electron-deficient alkenyl triflates and electron-rich alkenyliodoniumsalts undergo enantioselective and site-selective coupling with enelactams to deliver the products in high yields and excellent enantioselectivities. Furthermore
2-(Aryl)Azacyclylmethyl Carboxylates, Sulfonates, Phosphonates, Phosphinates and Heterocycles as S1p Receptor Antagonists
申请人:Hale Jeffrey John
公开号:US20090042954A1
公开(公告)日:2009-02-12
The present invention encompasses compounds of Formula I:
as well as the pharmaceutically acceptable salts thereof. The compounds are S1P
1
/Edg1 receptor agonists and thus have immunosuppressive, anti-inflammatory and hemostatic activities by modulating leukocyte trafficking, sequestering lymphocytes in secondary lymphoid tissues, and enhancing vascular integrity. The invention is also directed to pharmaceutical compositions containing such compounds and methods of treatment or prevention.