The org. groups of pentaorganylphosphorus compds. were found to undergo nucleophilic exchange with organolithium reagents. If an ethereal soln. of pentaphenylphosphorus is treated at room temp. with, e.g., 5 equivs. p-tolyllithium, the tetraarylphosphonium salts obtained by subsequent action of acids shows the ir bands of a tolyl group. [on SciFinder (R)]
Alkynes are found in a multitude of natural or synthetic bioactive compounds. In addition to the capacity of these chemical motifs to impact the physicochemical properties of a molecule of interest, the well-established reactivity of alkynes makes them ...