Primary Citation of Related Structures: 5ENK, 5ENM
PubMed Abstract:
By targeting the flap backbone of the BACE1 active site, we discovered 6-dimethylisoxazole-substituted biaryl aminothiazine 18 with 34-fold improved BACE1 inhibitory activity over the lead compound 1. The cocrystal structure of 18 bound to the active site indicated two hydrogen-bond interactions between the dimethylisoxazole and threonine 72 and glutamine 73 of the flap ...
By targeting the flap backbone of the BACE1 active site, we discovered 6-dimethylisoxazole-substituted biaryl aminothiazine 18 with 34-fold improved BACE1 inhibitory activity over the lead compound 1. The cocrystal structure of 18 bound to the active site indicated two hydrogen-bond interactions between the dimethylisoxazole and threonine 72 and glutamine 73 of the flap. Incorporation of the dimethylisoxazole substitution onto the related aminothiazine carboxamide series led to pyrazine-carboxamide 26 as a very potent BACE1 inhibitor (IC50 < 1 nM). This compound demonstrated robust brain Aβ reduction in rat dose-response studies. Thus, compound 26 may be useful in testing the amyloid hypothesis of Alzheimer's disease.
Organizational Affiliation:
Research and Development, Bristol-Myers Squibb Company , 5 Research Parkway, Wallingford, Connecticut 06492-7660, United States.
(2~{R},4~{S},6~{S})-4-[2,4-bis(fluoranyl)-5-pyrimidin-5-yl-phenyl]-6-(3,5-dimethyl-1,2-oxazol-4-yl)-1,3-thiazinan-2-amine C19 H19 F2 N5 O S QXXCXVMLHLDXDN-JENIJYKNSA-N
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