LAUSR

Deprotometalation is an efficient method to functionalize regioselectively aromatic compounds including heterocycles. This short review shows how it is possible to intercept aryllithiums (and other polar arylmetals) as soon as they are formed by in situ ‘trans-metal trapping’. The approach avoids long contact between aryllithiums and sensitive substrates. In addition, it allows less activated substrates to be deprotonated by non-nucleophilic lithium amides. While using chloro­silanes and borates still arouses the interest of chemists, more recently, methods based on zinc, aluminum and gallium have appeared, enabling this chemistry to grow dramatically. 1 Introduction 2 Silicon-Based In Situ Traps 3 Boron-Based In Situ Traps 4 Zinc-Based In Situ Traps 5 Aluminum- and Gallium-Based In Situ Traps 6 Other In Situ Traps 7 Continuous-Flow In Situ ‘Trans-Metal Trapping’ 8 Conclusion