Transition metal-catalysed cross-coupling reactions of P-activated enols

Transition metal catalysed cross-coupling reactions are ubiquitous in organic chemistry providing an impressive technique for C-C bond formation. Whilst many electrophilic partners have been described for these reactions, aryl and vinyl phosphates, phosphonates and phosphonites can offer advantages in terms of preparation, stability and reactivity profile. This critical review summarises the advances made to date utilising P-activated enols in metal-catalysed cross-coupling reactions (97 references).

Palladium-catalyzed Hiyama cross-coupling reactions of aryl mesylates

The combination of palladium acetate with XPhos shows high efficiency in the Hiyama cross-coupling reactions of aryl mesylates with arylsilanes. The reactions proceed smoothly to generate the corresponding biaryl compounds in good yields.

Facile synthesis of chromeno[4,3-b]quinolin-6-ones from unexpected reactions of aryl isocyanides with 4-chloro-2-oxo-2H-chromene-3-carbaldehyde

An unexpected reaction of aryl isocyanides with 4-chloro-2-oxo-2H-chromene-3-carbaldehyde leads to chromeno[4,3-b]quinolin-6-ones in good yields.

Molecular iodine: a highly efficient catalyst in the synthesis of quinolinesvia Friedländer annulation

A mild and efficient route for the synthesis of quinolines and polycyclic quinolines via Friedländer annulation, utilizing molecular iodine (1 mol%) as a new catalyst, is described.