An apparatus and its use for chemical synthesis is disclosed. In one embodiment, the apparatus comprises a solid support input and a plurality of reagent inputs, wherein each input is connectable to a main fluid pathway via a respective switchable valve. The apparatus further comprises a reaction chamber that is fluidly connectable to the main fluid pathway by a respective switchable valve downstream of the inputs, and that includes an outlet downstream of a barrier that prevents passage of solid support but allows passage of unbound molecules.
Apparatus and methods are described for split synthesis combinatorial chemistry that provides candidate libraries where an even distribution of theoretical products is obtainable through even mixing during the pooling step, followed by controlled redistribution of the mixed pooled products from the prior addition step into separate synthesis columns, one for each different specie of subunit to be added.
