Synthesis in mesoreactors: Ru(porphyrin)CO-catalyzed aziridination of olefins under continuous flow conditions
作者:S. Rossi、A. Puglisi、M. Benaglia、D. M. Carminati、D. Intrieri、E. Gallo
DOI:10.1039/c6cy00207b
日期:——
The Ru(porphyrin)CO-catalyzed addition of aryl azides to styrenes to afford N-aryl aziridines was successfully performed for the first time in mesoreactors under continuousflow conditions. Mesofluidic technology allowed for a rapid screening of different parameters and a quick identification of the optimized reaction conditions.
and cyclohexane) and the relative rate of O—H insertion into methanol to stereospecific cyclopropanation of the olefin to C—H insertion into cyclohexane are calculated from the ratios of products and substrates. It is found (i) that the reactivities of the substrates decrease in the order of methanol, olefin and cyclohexane and (ii) that electron-donating substituents generally lead to reaction with
Continuous Flow Synthesis and Purification of Aryldiazomethanes through Hydrazone Fragmentation
作者:Éric Lévesque、Simon T. Laporte、André B. Charette
DOI:10.1002/anie.201608444
日期:2017.1.16
often contaminated with other reagents and by‐products, making it incompatible with many applications, especially in catalysis. Herein is reported a metal‐free continuousflow method for the production of aryldiazomethane solutions in a non‐coordinating solvent from easily prepared, bench‐stable sulfonylhydrazones. All by‐products are removed by an in‐line aqueous wash, leaving a clean, base‐free diazo
Synthesis of Acyclic Ketones by Catalytic, Bidirectional Homologation of Formaldehyde with Nonstabilized Diazoalkanes. Application of a Chiral Diazomethyl(pyrrolidine) in Total Syntheses of Erythroxylon Alkaloids
作者:Andrew J. Wommack、Jason S. Kingsbury
DOI:10.1021/jo401377a
日期:2013.11.1
This work offers a catalytic approach to convergent ketone assembly based upon formal and tandem C–H insertion of diazoalkanes in the presence of limiting amounts of monomeric formaldehyde, which is easily generated as a gas by thermolysis of the inexpensive and abundant paraformaldehyde (∼30 USD/kg). The method forms di-, tri-, and even tetrasubstituted acetones with high efficiency, and it has streamlined