Nickel-catalyzed cross-coupling of unactivated alkyl halides using bis(pinacolato)diboron as reductant
作者:Hailiang Xu、Chenglong Zhao、Qun Qian、Wei Deng、Hegui Gong
DOI:10.1039/c3sc51098k
日期:——
The use of bis(pinacolato)diboron as the terminal reductant allows the efficient Ni-catalyzed coupling of unactivated secondary and primary alkyl halides, generating the C(sp3)–C(sp3) coupling products in good yields. The mild catalytic conditions display excellent functional group tolerance, and good chemoselectivities which require only 1.5 equiv. of primary bromides for the coupling with secondary bromides. Preliminary mechanistic studies suggest that an in situ organoborane/Suzuki process is not likely. It was identified that the base and ligand have more profound impact on selecting this reductive coupling pathway. The good chemoselectivity appears to be evoked by the formation of Ni–Bpin catalytic intermediates, which demands matched sizes and reactivities of the alkyl halide coupling partners for optimal coupling efficiency.
Pyridyl alkene and pyridyl alkine- acid amides as cytostatics and immuno-suppressives
申请人:Biedermann Elfi
公开号:US20070219197A1
公开(公告)日:2007-09-20
The present invention relates to new pyridine compounds, methods for their production, medicaments containing these compounds as well as their use, especially in the treatment of tumor conditions and/or as cytostatic agents or as immunosuppressive agents.
Pyridyl Alkene and Pyridyl Alkine-Acid Amides as Cytostatics and Immunosuppressives
申请人:Biedermann Elfi
公开号:US20070142377A1
公开(公告)日:2007-06-21
The invention relates to a new pyridyl alkene and pyridyl alkine acid amides according to the general formula (I)
as well as methods for their production, medicaments containing these compounds as well as their medical use, especially in the treatment of tumors or for immunosuppression.
NOVEL MALONIC ACID SULFONAMIDE DERIVATIVE AND PHARMACEUTICAL USE THEREOF
申请人:Yoshida Tomohiro
公开号:US20100228026A1
公开(公告)日:2010-09-09
The invention provides a sulfonyl malonamide derivative, or a pharmacologically acceptable salt thereof or a solvate thereof, that has therapeutic and/or preventive effect(s) on various diseases due to its agonist action at AT
2
receptor, and is useful as a pharmaceutical agent for the treatment and/or prevention of diseases involving the renin-angiotensin-aldosterone system (RAAS).
NEW METHOD FOR THE TREATMENT OF INFLAMMATORY DISEASES
申请人:Leo Oberdan
公开号:US20090325923A1
公开(公告)日:2009-12-31
The present invention relates to the use of an inhibitor of the formation of nicotinamide adenyl dinucleotide for the preparation of a medicament used in the treatment of inflammatory diseases such as rheumatoid arthritis and endotoxemia.