Amidoalkylation of Phosphorus Trichloride with Acetamide and Alkyl Oxocycloalkanecarboxylates
摘要:
The course of the reaction between phosphorus trichloride, acetamide, and ethyl oxoalkanecarboxylates was studied in terms of the production of side-products. When alkyl 2-oxocycloalkanecarboxylates were used as substrates, together with the expected products2-amino-2-phosphonocycloalkanecarboxylic acidsthree side-products, namely 1-aminocycloalkanephosphonic acids (decarboxylation products of the latter compounds), 1-aminoethane-1,1-diphosphonic acids, and 1-hydroxyethane-1,1-diphosphonic acids were identified. Ethyl 1-oxocycloalkanecarboxylate afforded 4-amino-4-phosphonocyclohexane carboxylic acid in good yield.