A facile and convenient method for the synthesis of cyclohexenone compounds was developed using an L-proline immobilizedsilicagelcatalyst combined with a continuous-flow approach. Because of the mild reaction conditions, ease of catalyst recyclability, and product isolation, this reaction approach can potentially be used in a facile scale-up reaction or in industrial applications.
Controlling Cyclic Dienamine Reactivity in Radical tert‐Alkylation for Molecular Diversity to Synthesize Multicyclic Compounds Possessing a Quaternary Carbon
作者:Shinjiro Kusano、Takashi Nishikata
DOI:10.1002/chem.202304215
日期:2024.3.20
Selective formation of the desired dienamines from β-methylcyclohexenone and their reaction with tertiary alkyl radicals generated from α-bromoesters led to the synthesis of γ-oxoalkyl substituted cyclohexenone derivatives (OAC) with a quaternary carbon have been successfully synthesized. This OAC can be used as a common synthetic intermediate for fused [5,6] rings and spirocycles.
Rhodium-catalyzed tandem aldol condensation–Robinson annulation between aldehydes and acetone: synthesis of 3-methylcyclohexenones
作者:Fen Wang、Yuchen Liu、Zisong Qi、Wei Dai、Xingwei Li
DOI:10.1016/j.tetlet.2014.09.093
日期:2014.11
A simple catalytic, redox-neutral access to 3-methylcyclohexenones has been developed via rhodium catalysis in the presence of an amine additive and Ag2CO3. This process utilized simple aldehydes and acetone as substrates and tolerates a variety of functional groups. Disubstituted phenols were isolated in moderate yields when Cu(OAc)(2) was employed as an oxidant. (C) 2014 Elsevier Ltd. All rights reserved.