Abstract
We report the first switchable acylation of H-phosphonate with chloroformate. The acylation site (P vs. O) in H-phosphonate was switched by changing the acyl pyridinium/ammonium ions. Unexpected phosphite formation was observed during the O-acylation of H-phosphonate. Twenty-six structurally diverse phosphotriesters and phosphonoformate esters were synthesized in microflow reactors.
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