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Propanephosphonic acid anhydride (T3P ® ) is a prevailing coupling and dehydrating agent with many desirable properties which render it a reagent of choice for a plethora of reactions and, befittingly, its application in organic synthesis is rapidly increasing. Since its introduction as a peptide coupling agent in 1980, the realm of applications of T3P has expanded. Currently its use is found in a broad range of reactions, including condensation, functional group transformation, heterocyclesdoi:10.1055/s-0033-1338989 fatcat:pzvqkmsxkzdrren3qhmuk7qzse