No abstract

Scheme 3. Scope of g-amino ketones 1. Reaction conditions: 1 (0.2 mmol), 2 (0.4 mmol), AgSbF 6 (15 mol %), and CH 2 Cl 2 (2 mL) at 50 8C under argon atmosphere for 24-48 h.Scheme 4. Proposed reaction mechanism. resulting residue was purified by column chromatography on silica gel (7:1 n-hexane/ethyl acetate) to afford the desired azepine product.

Oral squamous cell carcinoma (OSCC) is characterized by rapid local migration and invasion. This study was aimed at clarifying the effect of miR-654-5p on progression of OSCC. miR-654-5p promoted proliferation, metastasis, and chemoresistance of OSCC in vitro and in vivo. Consistently, miR-654-5p was upregulated in late-stage OSCC and was correlated with poor prognosis of OSCC patients. Furthermore, miR-654-5p was mechanistically verified to target Grb-2-related adaptor protein (GRAP), accompanied by the activation of Ras/MAPK signaling and the facilitation of epithelial-mesenchymal transition in OSCC cells. GRAP was downregulated in T1-2 stage versus T3-4 stage head and neck squamous cell carcinoma (HNSC) and was negatively correlated with tumor-node-metastases (TNM) stage in HNSC patients based on The Cancer Genome Atlas (TCGA) analysis. In addition, GRAP was positively correlated with good prognosis in HNSC patients. Our findings suggest that the miR-654-5p/GRAP/Ras/Erk signaling pathway in OSCC cells might contribute to the underlying mechanism through which miR-654-5p participates in the regulation of OSCC progression. miR-654-5p, as a potential biomarker for the clinical diagnosis and prognosis of OSCC, may be an effective anticancer target for the treatment of OSCC.

No abstract

The first iron-catalyzed 1,2-difunctionalization of styrenes and conjugated alkenes with silanes and either N or C, using an oxidative radical strategy, is described. Employing FeCl and di-tert-butyl peroxide allows divergent alkene 1,2-difunctionalizations, including 1,2-aminosilylation, 1,2-arylsilylation, and 1,2-alkylsilylation, which rely on a wide range of nucleophiles, namely, amines, amides, indoles, pyrroles, and 1,3-dicarbonyls, thus providing a powerful platform for producing diverse silicon-containing alkanes.

No abstract

In recent years, oil–water separation has been widely researched to reduce the influences of industrial wastewater and offshore oil spills. A filter membrane with special wettability can achieve the separation because of its opposite wettability for water phase and oil phase. In the field of filter membrane with special wettability, porous metal filter membranes have been much investigated because of the associated high efficiency, portability, high plasticity, high thermal stability, and low cost. This article provides an overview of the research progress of the porous metal filter membrane fabrication and discusses the future developments in this field.

DTBP (di-tert-butyl peroxide) is utilized to mediate oxidative 1,2-difunctionalization of activated alkenes with an aryl C(sp(2))-H bond and a benzylic C(sp(3))-H bond for the synthesis of functionalized oxindoles. This reaction is a new organomediated strategy for alkene difunctionalization facilitated by Lewis acids.