Reduction of CYP450 inhibition in the 4-[(1H-imidazol-4-yl)methyl]piperidine series of histamine H3 receptor antagonists
作者:Michael Berlin、Pauline C. Ting、Wayne D. Vaccaro、Robert Aslanian、Kevin D. McCormick、Joe F. Lee、Margaret M. Albanese、Mwangi W. Mutahi、John J. Piwinski、Neng-Yang Shih、Luli Duguma、Daniel M. Solomon、Wei Zhou、Rosy Sher、Leonard Favreau、Matthew Bryant、Walter A. Korfmacher、Cymbelene Nardo、Robert E. West、John C. Anthes、Shirley M. Williams、Ren-Long Wu、H. Susan She、Maria A. Rivelli、Michel R. Corboz、John A. Hey
DOI:10.1016/j.bmcl.2005.10.087
日期:2006.2
A novel series of histamine H3 receptor antagonists based on the 4-[(1H-imidazol-4-yl)methyl]piperidine template displaying low CYP2D6 and CYP3A4 inhibitory profiles has been identified. Structural features responsible for the reduction of P450 activity, a typical liability of 4-substituted imidazoles, have been established.
Synthesis of l-azatyrosine using pseudoephedrine as a chiral auxiliary
申请人:California Institute of Technology
公开号:US05760237A1
公开(公告)日:1998-06-02
A practical synthesis of the potential chemotherapeutic agent L-azatyrosine is described. The key step involved the alkylation of (R,R)-(-)-pseudoephedrine glycinamide with 5-benzenesulfonyloxy-2-iodomethylpyridine and proceeded in 70-95% yield and 89-95% de. Simultaneous hydrolysis of the auxiliary and the benzenesulfonate protecting group afforded L-azatyrosine of .gtoreq.99% ee in 73% yield on multigram scale (recovery yield of (R,R)-(-)-pseudoephedrine: 90%).