Functional Group Modification

Functional group modification systematically alters a specific chemical group within a lead compound — converting an ester to an amide, a ketone to an...

Functional group modification systematically alters a specific chemical group within a lead compound — converting an ester to an amide, a ketone to an alcohol, or introducing a halogen substituent at a defined ring position — to probe its contribution to biological activity and physicochemical properties. Each functional group modification is interpreted in light of its expected effect on hydrogen-bonding capacity, electronic character, metabolic lability, and overall polarity, and the systematic accumulation of such modifications across an analogue series constitutes the practical experimental basis from which the broader structure–activity relationship model described above is constructed.