Reversed-Polarity Synthesis of N-Sulfonyl Ketimines with Imidoylsilanes and Diaryliodonium Salts via Palladium-Catalyzed Reactions

Imines are important building blocks in organic chemistry. Iminines, aldimines and ketimines, have been traditionally synthesized by the condensation reaction of the corresponding carbonyl compound with an amine moiety. More recently, palladium-catalyzed synthesis of ketimines using imidoyl chlorides has been reported. As an alternative, we report the reversed-polarity synthesis of N-sulfonyl ketimines using an anion equivalent imidoylsilane as a new nucleophilic coupling partner in the presence of a palladium catalyst. To the best of our knowledge, this is the first report of the use of imidoylsilanes in transition-metal-catalyzed coupling reactions. Diaryliodonium salt as an electrophile, various aryl-aryl or heteroaryl-aryl N-sulfonyl ketimines were successfully prepared in up to 99% isolated yields.

Redox-state dependent activation of silanes and ammonia with reverse polarity (PCcarbeneP)Ni complexes: electrophilic vs. nucleophilic carbenes

A rigidified PC_alkylP ligand allowed for the synthesis and characterization of cationic and radical PC_CarbeneP nickel complexes in which the carbene anchor of the pincer framework is electrophilic rather than nucleophilic.

Synthesis and crystal structure of a novel prochiral ketoimine: (E)-acetophenoneO-diphenylphosphoryl oxime

A novel activated prochiral ketoimine, (E)-acetophenoneO-diphenylphosphoryl oxime, C20H18NO2P, with an electron-withdrawing substituent on the imine N atom similar to other prochiral ketoimines, has been synthesized and the X-ray crystal stucture determined. The molecules pack together in the solid stateviaweak intermolecular C—H...O interactions and both face-to-face and edge-to-face π-stacking interactions.

Synthesis of N-Sulfonylimines Using CeCl3 Under Neutral Conditions

An efficient and environmentally benign method for the synthesis of N-sulfonylimines is reported. Condensation of aryl sulfonamides with different aromatic aldehydes and ketones gave N-sulfonylimines in good to excellent yields in the presence of 10 mol% CeCl3 as catalyst. This method can be used with both aldehydes and ketones.