Wiley Online Library : Advanced Synthesis & Catalysis
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Aldehyde‐Mediated Open‐Air Stereoselective β‐Glycosylation of Glycals: An Expeditious Route towards Glycosyl‐Ester Synthesis

The study introduces a method for achieving a selective synthesis of β-glycosyl esters through the reaction of glycals with carboxylic acids. This process is characterized by stereoselectivity, operating under mild reaction conditions and in an open-air environment mediated by an aldehyde. Detailed investigations and control experiments indicate the...

Fri Jul 26, 2024 11:27
C‐C Bond Formation by Dual Pyrrolidine and Nickel Catalysis: Allylation of Ketones by Allylic Alcohols.

Whilst catalytic ketone allylation using palladium(0) is well–precedented, nickel(0)-catalysed equivalents of such reactions remain scarce. We report here the first nickel-catalysed allylation of ketones which uses an easily handled and inexpensive bench-stable Ni(II) pre-catalyst. This method avoids generation of stoichiometric by-products via the...

Fri Jul 26, 2024 11:27
Domino Doyle‐Kirmse/Claisen‐Thioimidate Rearrangements: Access to 2‐Aminobuta‐1,3‐diene Derivatives of Benzazole‐2‐thiones

A domino sequence consisting of a rhodium-catalyzed Doyle-Kirmse rearrangement followed by a Claisen-thioimidate rearrangement has been developed. This type of thio-Claisen rearrangement represents the first example reported in the homoallenylsulfenyl series. The sequence involves 2-propargylsulfenyl benzazoles and diazoesters, affording N-butadienyl...

Fri Jul 26, 2024 11:27
Oxidative photochemical cyclisations to access spiroketals

The spiroketal moiety is an important substructure within many biological natural products. One method to access them is via the oxidative cyclisation of a pendant hydroxyl group on to a pre-formed pyran. However applications of this methodology have been severely limited by requiring the use of toxic and powerful oxidants, such as lead (IV) tetraacetate...

Thu Jul 25, 2024 11:21
Bunte Salts for Electrochemical Deuteroalkylthiolation of Heteroarenes

This study presents a strategy for the electrochemical deuteroalkylthiolation of heteroarenes, using Bunte salt as a deuterium-alkylthio source. This reaction occurs in an undivided cell without the need for catalysts, oxidants, or electrolytes, yielding a variety of deuteroalkylthiolated heteroarenes.

Wed Jul 24, 2024 13:05
A Catalytic Intramolecular Aldehyde–Alkyne Metathesis Approach to Azepino[1,2‐a]indoles

Reported herein is a method for the construction of azepino[1,2-a]indoles via an intramolecular aldehyde–alkyne metathesis of 1-(5-aryl-4-pentynyl)indole-2-carbaldehydes. This Sc(OTf)3-catalyzed reaction has several remarkable features, such as ready accessibility of the starting materials, broad substrate scope, operational simplicity, and high yields....

Wed Jul 24, 2024 13:05

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