Abstract
A stable penta-coordinated serine-carboxylic-phosphoric anhydride may be synthesized at temperatures below −18°C. Above that temperature, the product was shown to isomerize to another penta-coordinated phosphorus compound, which was proven by the change in the magnitude of observed P–C coupling constants. The mechanism for the anhydride to ester isomerization might provide a clue to the proposal of high-energy supply for biochemistry. Organic bases were shown to exert little influence on the rate of isomerization.
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