enantioselective Negishi cross‐coupling reaction, and the first arylation of α‐halo esters with arylzinc halides, are disclosed. Employing a cobalt‐bisoxazoline catalyst, various α‐arylalkanoic esters were synthesized in excellent enantioselectivities and yields (up to 97 % ee and 98 % yield). A diverse range of functional groups, including ether, halide, thioether, silyl, amine, ester, acetal, amide, olefin
[EN] NOVEL SPIRO IMIDAZOLONES AS GLUCAGON RECEPTOR ANTAGONISTS, COMPOSITIONS, AND METHODS FOR THEIR USE<br/>[FR] NOUVELLES SPIRO-IMIDAZOLONES EN TANT QU'ANTAGONISTES DE RÉCEPTEUR DE GLUCAGON, COMPOSITIONS ET LEURS PROCÉDÉS D'UTILISATION
申请人:SCHERING CORP
公开号:WO2011119559A1
公开(公告)日:2011-09-29
The present invention relates to compounds of the general formula: wherein ring A, ring B, R1, R3, Z, L1, and L2 are selected independently of each other and are as defined herein, to compositions comprising the compounds, and to methods of using the compounds as glucagon receptor antagonists and for the treatment or prevention of type 2 diabetes and conditions related thereto.
Pyrazole derivatives, compositions containing such compounds and methods of use
申请人:Parmee R. Emma
公开号:US20070088070A1
公开(公告)日:2007-04-19
Pyrazoles having a naphthyl group attached are disclosed. The compounds are useful for treating type 2 diabetes and related conditions. Pharmaceutical compositions and methods of treatment are also included.
contributed equally to this work. Abstract The preparation of pyridylzinc compounds from the corresponding pyridyl halides using a cobalt catalyst is described. The complex employed features a polydentate N-heterocyclic ligand and allows the reaction to be carried out in the absence of pyridine as co-solvent and also in THF in place of acetonitrile. First cross-coupling attempts are also presented. Satisfactory
Room-temperature nickel-catalysed cross-couplings of aryl chlorides with arylzincs
作者:Ning Liu、Li Wang、Zhong-Xia Wang
DOI:10.1039/c0cc03064c
日期:——
P,N,O-chelate nickel complexes efficiently catalyse the cross-coupling reaction of arylchlorides with arylzinc reagents in a 1:1 THF-NMP mixture. The reactions proceed at room temperature with low catalyst loading.