Agm. Barrett et al., IMPURITY ANNIHILATION - A STRATEGY FOR SOLUTION-PHASE COMBINATORIAL CHEMISTRY WITH MINIMAL PURIFICATION, Chemical communications, (21), 1998, pp. 2317-2318
The selective annihilation of all contaminants in the solution phase f
ormation of amides or sulfonamides is accomplished by their incorporat
ion into a polyurea and removal by filtration.