6-Heptynoic acid is an alkynoic acid with an acetylene bond.It undergoes condensation with various pyrroles to afford optical diverse fluorescent dyes with a terminal alkyne.6-Heptynoic acid may be used for the following syntheses: · alkyne functionalized Boradiazaindacenes (BODIPY)dyes · natural products epothilone B and D · hymenialdisine (HMD) and aldisine (AD) affinity resins · alkynyl esters 6-Heptynoic acid is an alkynoic acid with an acetylene bond.It undergoes condensation with various pyrroles to afford optical diverse fluorescent dyes with a terminal alkyne.