2-Fluoro-6-hydroxyphenylboronic Acid is a synthetic reagent used in the preparation of alkylene-bridged [(3,4-dihydro-2H-benzo[b][1,4]oxazinyl) or (piperidinyl)(biphenyl-3-yl)pyrazolo[1,5-a]pyrimidinyl](tert-butoxy)acetic acid derivatives as HIV integrase inhibitors for treating HIV infection.