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A palladium‐catalyzed (Pd(PPh3)4/Ag2O/PivOH) C2‐regioselective direct dehydrogenative alkynylation of unsubstituted selenophene was achieved. The selenophenes substituted with R1 groups at 2‐position can be C5‐alkynylated with a variety of 4‐substituted phenylacetylenes (R2 groups). The R1 and R2 can be either electron‐withdrawing or electron‐donating groups, demonstrating a wide range of substrate...
BackgroundInfiltrating macrophage count (IMC) is found to correlate with the progression and prognosis of many human cancers.
MethodsThis study used immunohistochemistry to measure the IMC (macrophages/high‐power field [HPF]) in 92 specimens of oral squamous cell carcinoma (OSCC).
ResultsA significantly increased IMC was found in OSCCs with larger tumor size, positive lymph node metastasis, more...
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