Synthesis of Sulfones by Iron‐Catalyzed Decomposition of Sulfonylhydrazones

Abstract

The Fe-catalyzed decomposition of sulfonylhydrazones gives rise to sulfones. The reaction is quite general and allows the preparation of sulfones from a variety of aryl, alkyl, and α,β-unsaturated aldehydes and ketones. Crossover experiments

Tosylhydrazone – neue Anwendungen klassischer Reagentien in palladiumkatalysierten Kreuzkupplungen und metallfreien Umsetzungen

“…[41][42][43] Der postulierte Mechanismus dieser Reaktion (Schema 38) ähnelt den Mechanismen der klassischen Hooz- [45] und Brown-Reaktionen [46] stabilisierter Diazoverbindungen mit Alkylboranen sowie der kürzlich von Wang et al [47] …”

Luxury of N‐Tosylhydrazones in Transition‐Metal‐Free Transformations

“…[12] The use of stable,r eadilya vailable boronic acids as potential carbon nucleophiles,o perational simplicity, and avoidance of inert atmospheres as wella sd ry solvents,m ake this novelm ethodology more general. [12] The use of stable,r eadilya vailable boronic acids as potential carbon nucleophiles,o perational simplicity, and avoidance of inert atmospheres as wella sd ry solvents,m ake this novelm ethodology more general.…”

“…[107] Inspired by the Barluengasw orko nt he reductive coupling of tosylhydrazones with boronic acids, [12] Wangsr esearch group in 2011 conceptualized aC À B Scheme 95. This efficient two-step deoxygenative dihalogenation reaction readily affordedt he gem-dichlorooxindoles from various 5-and N-substituted isatin tosylhydrazones.…”

Palladium‐Catalyzed Indole Ring Synthesis

“…Microwave heating facilitated the Mori-Ban-Heck indole synthesis [34][35][36]; the latter example provided a new route to 3-nitroindoles. However, Barluenga and coworkers effected a novel one-pot indole synthesis from o-haloanilines and alkenyl halides (Scheme 3, equation 1) [37]. However, Barluenga and coworkers effected a novel one-pot indole synthesis from o-haloanilines and alkenyl halides (Scheme 3, equation 1) [37].…”