Abstract N-and O-Triorganosilylated compounds related to various anticancer agents were synthesized for evaluation as potential anticancer prodrugs. 1 H-NMR and UV kinetic measurements of hydrolytic desilylation were used to correlate relative rates of structural unmasking with steric bulk about the silicon reaction center. The tert-butyldimethylsilyl ester of chlorambucil and a number of O-triorganosilylated carbamate derivatives of nor- ...