102561-43-3Relevant articles and documents
A Divergent Nickel-Catalyzed Synthesis of Quinazolinediones and Benzoxazinone Imines
Wertjes, William,Ayers, Sloan,Gao, Qi,Simmons, Eric M.,Beutner, Gregory L.
supporting information, p. 4453 - 4461 (2018/05/25)
During exploration of the nickel(0)-catalyzed reaction of isocyanates and isatoic anhydrides, it was found that changes in the substitution pattern of the isocyanate led to constitutionally isomeric quinazolinediones [quinazoline-2,4(1 H,3 H)-diones] or benzoxazinone imines [2-imino-1,2-dihydro-4 H -3,1-benzoxazin-4-ones]. Ligand and solvent screening experiments allowed for identification of conditions that could lead to each constitutional isomer in good to excellent levels of selectivity and yield. Comprehensive characterization of the previously poorly characterized benzoxazinone imines is also provided.
Structural optimization of a CXCR2-directed antagonist that indirectly inhibits γ-secretase and reduces Aβ
Bakshi, Pancham,Jin, Chao,Broutin, Pierre,Berhane, Beniam,Reed, Jon,Mullan, Michael
experimental part, p. 8102 - 8112 (2010/03/24)
Amyloid β (Aβ), a key molecule in the pathogenesis of Alzheimer's disease (AD), is derived from the amyloid precursor protein (APP) by sequential proteolysis via β- and γ-secretases. Because of their role in generation of Aβ, these enzymes have emerged as important therapeutic targets for AD. In the case of γ-secretase, progress has been made towards designing potent inhibitors with suitable pharmacological profiles. Direct γ-secretase inhibitors are being evaluated in clinical trials and new strategies are being explored to block γ-secretase activity indirectly as well. In this regard, we have previously reported an indirect regulation of γ-secretase through antagonism of CXCR2, a G-protein coupled receptor (GPCR). We demonstrated that N-(2-hydroxy-4-nitrophenyl)-N′-(2-bromophenyl)urea (SB225002), a selective inhibitor of CXCR2 also plays a role in an indirect inhibition of γ-secretase. Furthermore, we reported a ~5-fold difference in the selective inhibition of APP versus Notch processing via γ-secretase following treatment with SB225002. Herein we describe the synthesis and optimization of SB225002. By determination of the structure-activity relationship (SAR), we derived small molecules that inhibit Aβ40 production with IC50 values in the sub-micromolar range in a cell-based assay and also validated the potential of CXCR2 as a new target for therapeutic intervention in AD.