Palladium-Catalyzed Intermolecular Allylic Dearomatization Reaction of α-Substituted β-Naphthol Derivatives: Scope and Mechanistic Investigation
作者:Chun-Xiang Zhuo、Shu-Li You
DOI:10.1002/adsc.201400154
日期:2014.6.16
A highly efficient dearomatizationreaction of α‐substituted β‐naphthols with excellent chemoselectivity and regioselectivity has been developed. Mechanistic studies demonstrated that the dearomatized alkylation product is the thermodynamically more stable compound. The etherification product could be further transformed to the dearomatization product.
Oxidative cyclization of alkenoic acids promoted by AgOAc
作者:Ulises A. Carrillo-Arcos、Jonathan Rojas-Ocampo、Susana Porcel
DOI:10.1039/c5dt03808a
日期:——
Alkenoic acids derived from salicylic acid analogues undergo an unexpected oxidative cyclization process triggered by AgOAc leading to 4H-benzo[d][1,3]dioxin-4-ones.
2-(3-Aryl-2-propenyloxy)benzaldehyde (or 1-naphthaldehyde) arylhydrazones undergo an intramolecular cycloaddition reaction via their 1,3-dipolar tautomers, azomethine imines, to the alkenyl group. Initial cycloadducts were converted to dehydrogenated compounds under the reaction conditions. On the other hand, introduction of cyano or ethoxycarbonyl groups instead of the aryl group into 3-position of