62085-70-5Relevant academic research and scientific papers
Activation of anti-oxidant Nrf2 signaling by enone analogues of curcumin
Deck, Lorraine M.,Hunsaker, Lucy A.,Vander Jagt, Thomas A.,Whalen, Lisa J.,Royer, Robert E.,Vander Jagt, David L.
, p. 854 - 865 (2017/12/13)
Inflammation and oxidative stress are common in many chronic diseases. Targeting signaling pathways that contribute to these conditions may have therapeutic potential. The transcription factor Nrf2 is a major regulator of phase II detoxification and anti-oxidant genes as well as anti-inflammatory and neuroprotective genes. Nrf2 is widespread in the CNS and is recognized as an important regulator of brain inflammation. The natural product curcumin exhibits numerous biological activities including ability to induce the expression of Nrf2-dependent phase II and anti-oxidant enzymes. Curcumin has been examined in a number of clinical studies with limited success, mainly owing to limited bioavailability and rapid metabolism. Enone analogues of curcumin were examined with an Nrf2 reporter assay to identify Nrf2 activators. Analogues were separated into groups with a 7-carbon dienone spacer, as found in curcumin; a 5-carbon enone spacer with and without a ring; and a 3-carbon enone spacer. Activators of Nrf2 were found in all three groups, many of which were more active than curcumin. Dose-response studies demonstrated that a range of substituents on the aromatic rings of these enones influenced not only the sensitivity to activation, reflected in EC50 values, but also the extent of activation, which suggests that multiple mechanisms are involved in the activation of Nrf2 by these analogues.
Amberlyst-15 and Amberlite-200C: Efficient catalysts for aldol and cross-aldol condensation under ultrasound irradiation
Lahyani, Achraf,Chtourou, Manef,Frikha, Mohamed Hédi,Trabelsi, Mahmoud
, p. 1296 - 1301 (2013/06/27)
This paper presents an improved synthesis of trans-chalcones and α,α′-bis(arylmethylidene) cycloalkanones under ultrasound irradiation in the presence of commercial acid-resins as catalysts in solvent free conditions. Several trans-chalcones and α,α′- bis(arylmethylidene) cycloalkanones were synthesized in good yields and excellent selectivity in a short reaction time.
Catalytic asymmetric synthesis of aromatic spiroketals by spinphox/iridium(I)-catalyzed hydrogenation and spiroketalization of α,α′-Bis(2-hydroxyarylidene) ketones
Wang, Xiaoming,Han, Zhaobin,Wang, Zheng,Ding, Kuiling
supporting information; experimental part, p. 936 - 940 (2012/03/08)
From spiro to spiro: An iridium(I) complex with a spiral P,N ligand (SpinPhox) is highly efficient in the catalytic asymmetric hydrogenation of α,α′-bis(2-hydroxyarylidene) ketones to afford the corresponding aromatic spiroketals in high yields with excellent diastereo- and enantioselectivities (see scheme). The complex plays a dual role in the reaction, acting as catalyst for both the hydrogenation of C=C bonds and the subsequent spiroketalization of bisphenolic ketones. Copyright
