N-Heterocyclic carbene-catalyzed deaminative cross-coupling of aldehydes with Katritzky pyridinium salts
作者:Inwon Kim、Honggu Im、Hyeonyeong Lee、Sungwoo Hong
DOI:10.1039/d0sc00225a
日期:——
By employing an N-heterocycliccarbene (NHC) catalyst, we developed a versatile catalyticsystem that enables deaminative cross-coupling reactions of aldehydes with redox-active pyridinium salts. Katritzky pyridinium salts behave as single-electron oxidants capable of generating alkyl radicals enabled by the redox properties of the enolate form of Breslowintermediates. The resultant alkyl radical
Spirohexadienone is a structural moiety present in several biologically active natural products isolated both from terrestrial and marine natural sources. This structural moiety is commonly and strictly related to the biological properties exhibited by the natural products. We show herein that the combination of intermolecular Heck reactions with a phenolic oxidation induced by hypervalent iodine form these structural moieties from Morita-Baylis-Hillman adducts in moderate to good overall yields.
An easy access to halogenated and non-halogenated spiro-hexadienones
作者:Lucimara J. Martins、Bruno R.V. Ferreira、Wanda P. Almeida、Marcelo Lancellotti、Fernando Coelho
DOI:10.1016/j.tetlet.2014.07.114
日期:2014.9
Spirocyclohexadienones as an Uncommon Scaffold for Acetylcholinesterase Inhibitory Activity
作者:Ralph C. Gomes、Renata P. Sakata、Wanda P. Almeida、Fernando Coelho
DOI:10.2174/1573406414666181109114214
日期:2019.5.20
elderly people is the Alzheimer’s disease (AD). Patients affected by this progressive and neurodegenerative disease have severe memory and cognitive function impairments. Some medicines used for treating this disease in the early stages are based on inhibition of acetylcholinesterase. Population aging should contribute to increase the cases of patients suffering from Alzheimer'sdisease, thus requiring the