A series of novel aromatic tritylamino heterocycles has been synthesized and the compounds have been tested in comparison with clotrimazole for their ability to inhibit the slow afterhyperpolarization current (sI(AHP)) in cultured rat hippocampal pyramidal neurones. Some analogues of the clotrimazole metabolite, 2-chlorophenyl-diphenyl methanol, having different chlorination substitution in the triphenyl group have also been examined. Two compounds in particular, 3-[(2-chlorophenyl)-diphenylmethylamino]pyridine (3a, UCL 1880) and 2-tritylaminothiazole (6, UCL 2027), are of special interest; they are effective blockers of the sI(AHP) (IC50 = 1.1-1.2 muM) and are much more selective than clotrimazole since they have less effect on the high voltage-activated Ca2+ current.
1-CARBOXY-1-VYNILOXYIMINOAMINOTHIAZOLE CEPHALOSPORING DERIVATIVES AND PROCESS FOR THEIR PREPARATION
申请人:BANYU PHARMACEUTICAL CO., LTD.
公开号:EP0346465B1
公开(公告)日:1993-08-11
US5084453A
申请人:——
公开号:US5084453A
公开(公告)日:1992-01-28
US5225406A
申请人:——
公开号:US5225406A
公开(公告)日:1993-07-06
Buttressing Effect as a Key Design Principle towards Highly Efficient Palladium/N-Heterocyclic Carbene Buchwald-Hartwig Amination Catalysts
作者:Yin Zhang、Guy Lavigne、Noël Lugan、Vincent César
DOI:10.1002/chem.201702859
日期:2017.10.4
The backbone substitution of the standard 1,3‐bis(2,6‐diisopropylphenyl)‐2H‐imidazol‐2‐ylidene (IPr) ligand by dimethylamino groups was previously shown to induce a dramatic improvement in the catalytic efficiency of the corresponding Pd–PEPPSI (pyridine‐enhanced pre‐catalyst preparation, stabilization, and initiation) pre‐catalysts in N‐arylation reactions. Herein, a thorough structure/activity study