One-Pot Allan-Robinson/Friedländer Route to Chromen-/Quinolin-4-ones through the Domino Acetylative Cyclisation of 2-Hydroxy-/2-Aminobenzaldehydes
作者:Vijai K. Rai、Fooleswar Verma、Ganeshwar P. Sahu、Manorama Singh、Ankita Rai
DOI:10.1002/ejoc.201701435
日期:2018.1.31
A domino reaction between 2‐hydroxy‐/2‐aminobenzaldehydes and α‐haloketones gives chromen‐4‐ones and quinolin‐4‐ones in good to excellent yields. This method represents a new extension of the Allan–Robinson and Friedländer reactions, and uses N‐heterocyclic‐carbene catalysis. This approach has the advantages of operational simplicity, ambient reaction conditions, and no by‐product formation.
Small molecule compounds and compositions containing said compounds useful for inhibiting signaling by certain Toll-like receptors (TLRs), particularly TLR9, are provided. The compounds and compositions can be used to inhibit immune responses, including unwanted immune responses in particular. Compounds, compositions, and methods are provided to treat a variety of conditions involving unwanted immune responses, including for example autoimmune disease, inflammation, transplant rejection, and sepsis.
The present invention relates to macrocyclic compounds of formula (I) that are useful as inhibitors of the hepatitis C virus (HCV) NS3 protease, their synthesis, and their use for treating or preventing HCV infections.
series of C-3 position perfluoroalkylated 4-quinolones were obtained smoothly via radical pathway in the presence of RfSO2Na and (NH4)2S2O8. The protocol features broad substrates scope, high regioselectivity, transition metal-free, and easily available fluorinating reagents, exhibiting potential application value for obtaining bioactive compounds.
在R f SO 2 Na 和(NH 4 ) 2 S 2 O 8存在下,通过自由基途径顺利获得了一系列C-3位全氟烷基化4-喹诺酮类化合物。该方案具有底物范围广、区域选择性高、不含过渡金属、易于获得的氟化试剂等特点,在获得生物活性化合物方面具有潜在的应用价值。