Dedicated to the memory of our colleague and friend Prof. Marcial Moreno-Mañas.
Abstract:The Suzuki biaryl coupling of a range of electronically dissimilar arylboronic acids and aryl bromides is performed in neat water with excellent to quantitative yields by means of a new CNCpincer palladium catalyst that is soluble in water due to its para-carboxy group. Extremely high turnover numbers and frequencies combined with a remarkable robustness allow an effective catalyst reuse in sustainable conditions.
Key points in the synthesis of (−)‐hygromycin A are the tethered aminohydroxylation reaction used to prepare the aminocyclitol unit and the choice of a bulky protecting group on the sugar unit to facilitate selective Mitsunobu glycosylation and also bestow kinetic stability upon an otherwise vulnerable proton.
The application of the Nazarov photocyclization as a mild and efficient method for access to the basic core of novel indoloditerpenoid derivatives is reported. The detailed synthesis of these new analogues of terpendole E, as well as their evaluation as potential inhibitors of KSP, is described.
The synthesis of a series of 2,3-diarylbenzo[b]furans starting from 1,2-diarylethanones and 1,2-dibromoarenes proceeds by means of both homogeneous and polymer-anchored palladium catalysts. This tandem process can be effectively halted at the C-arylation step, thus providing key o-bromoarylated deoxybenzoin intermediates in good yields. The ef-
[reaction: see text]. After a rigorous study on the effect of several catalytic systems, a simple, high yielding procedure for the preparation of 1,2,2-triarylethanones, skeletal analogues of tamoxifen, is presented. Apart from the economic and environmental advantages involved, this palladium-catalyzed arylation of deoxybenzoin enolates features a lack of ortho-arylation side reactions. In addition, an alternative approach from acetophenones to the target triarylethanone system is also announced.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.