Journal
JOURNAL OF THE CHEMICAL SOCIETY-PERKIN TRANSACTIONS 2
Volume -, Issue 10, Pages 1728-1739Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/b111250n
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Treatment of N-acetoxy-N-alkoxyamides or N-alkoxy-N-chloroamides with sodium azide in aqueous acetonitrile results in S(N)2 displacement of chloride and the formation of reactive N-alkoxy-N-azidoamides. The reaction with N-acetoxy-N-benzyloxybenzamide has been studied kinetically (k(294=)2 L mol(-1) s(-1)) and azidation of N-formyloxy-N-methoxyformamide has been modeled computationally at the pBP/DN*//HF/6-31G* level of theory. The anomeric amides N-alkoxy-N-azidoamides decompose intramolecularly and spontaneously to esters and two equivalents of nitrogen. This extremely exothermic process facilitates the formation, in excellent yields, of highly hindered esters.
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