Synthesis of Isotopically Labelled Oligoprenyl Diphosphates and Their Application in Mechanistic Investigations of Terpene Cyclases

A flexible, efficient and robust method for the synthesis of isotopically labelled oligoprenyl diphosphates was developed. The method makes use of just a few building blocks (acetone, triethyl phosphonoacetate, and ethyl acetoacetate) from which several isotopomers with deuterium or 13C-labelling are commercially available or can be easily obtained by synthesis. Besides these building blocks, a few deuterated reagents were used for the introduction of deuterium labelling. Furthermore, the synthesis of [14-2H]geranylgeranyl diphosphate is reported. The material was used for a stereochemical analysis of the cyclisation reaction catalysed by tuberculosinyl diphosphate synthase from Mycobacterium tuberculosis.

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