5 years ago

Chemical Synthesis of (RP)- and (SP)-[16O,17O,18O]Phosphoenol Pyruvate

Chemical Synthesis of (RP)- and (SP)-[16O,17O,18O]Phosphoenol Pyruvate
Friedrich Hammerschmidt, Alexander Roller, Petra Malová Križková, Susanne Prechelmacher
Enzymes and chirality are intimately associated. For their mechanisms to be studied, chiral substrates are needed as probes. Here, we report a concise synthesis of (RP)- and (SP)-[16O,17O,18O]phosphoenol pyruvate starting from enantiomerically pure (R)-2-chloro-1-phenylethanol, which was transformed into 18O-labeled 3-methyl-1-phenylbutane-1,3-diol. The diol was reacted with tris(dimethylamino)phosphane and consecutively with H217O to yield a mixture of cyclic H-phosphonates labeled with 17O and 18O. They were silylated and subjected to a Perkow reaction with ethyl 3-chloropyruvate. Two protected-[16O,17O,18O]phosphoenol pyruvates were formed and finally globally deprotected. Their configuration was reassessed by a known enzymatic test in combination with conversion of the formed d-glucose-6-phosphate into mixtures of labeled methyl d-glucose-4,6-phosphates, which were analyzed by 31P NMR spectroscopy. The enzymatic test supported the configuration assigned to labeled stereogenic phosphorus atoms on the basis of synthesis.

Publisher URL: http://dx.doi.org/10.1021/acs.joc.7b01783

DOI: 10.1021/acs.joc.7b01783

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